Ford Escape Quiz
Powertrain

Diagnosis and Testing - Electronic Engine Controls

In this manual: Powertrain
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~79min read

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Module Trouble Code Description Action
PCM P0602:00 Powertrain Control Module Programming Error: no subtype information GO to Pinpoint Test QA
PCM P0604:00 Internal Control Module Random Access Memory (RAM) Error: No Sub Type Information GO to Pinpoint Test QA
PCM P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub-type Information GO to Pinpoint Test QA
PCM P0606:00 Control Module Processor: No Sub-type Information GO to Pinpoint Test QA
PCM P0607:00 Control Module Performance: No Sub-type Information GO to Pinpoint Test QA
PCM P0610:00 Control Module Vehicle Options Error: No Sub Type Information GO to Pinpoint Test QA
PCM P061E:00 Internal Control Module Brake Signal Characteristics: No Sub Type Information GO to Pinpoint Test QA
PCM P062F:00 Internal Control Module EEPROM Error: No Sub Type Information GO to Pinpoint Test QA
PCM P0630:00 VIN Not Programmed or Mismatched - ECM/PCM: No Sub Type Information GO to Pinpoint Test QA
PCM P064F:00 Unauthorized Software/Calibration Detected: No Sub Type Information GO to Pinpoint Test QA
PCM P1001:00 KOER Cannot Complete, KOER Aborted: No Sub Type Information GO TO Pinpoint Test R
PCM P160A:00 Control Module Vehicle Configuration Options Reconfiguration Error: No Sub Type Information GO to Pinpoint Test QA
PCM P161C:00 Engine Auto Shutdown Mismatch with Vehicle Configuration: No Sub Type Information GO to Pinpoint Test QA
PCM P1635:00 Bus/Axle Out of Range: No Sub Type Information GO to Pinpoint Test QA
PCM P1639:00 Vehicle Identifier Block Corrupt, Not Programmed: No Sub Type Information GO to Pinpoint Test QA
PCM P166A:00 Restraint Deployment Communication Circuit: No Sub Type Information GO to Pinpoint Test S
PCM P1935:00 Brake switch/sensor signal: no sub-type information GO to Pinpoint Test QA
PCM P1A0C:00 Hybrid Transmission Control Module Engine Disabled: No Sub Type Information GO TO Pinpoint Test T
PCM P264F:00 Engine Serial Number Not Programmed or Mismatched: No Sub Type Information GO to Pinpoint Test QA
PCM U0103:00 Lost Communication with Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test A
PCM U0104:00 Lost Communication with Cruise Control Module: No Sub Type Information GO to Pinpoint Test B
PCM U0111:00 Communication lost with Battery Energy Control Module "A": no subtype information GO to Pinpoint Test C
PCM U0121:00 Lost Communication with Anti-Lock Brake System (ABS) Control Module 'A': No Sub-type Information GO to Pinpoint Test D
PCM U0126:00 Lost Communication with Steering Wheel Angle Sensor Module: No Sub Type Information GO to Pinpoint Test E
PCM U0131:00 Lost Communication with Power Steering Control Module 'A': No Sub Type Information GO to Pinpoint Test F
PCM U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test G
PCM U0151:00 Lost Communication with Restraints Control Module: No Sub Type Information GO to Pinpoint Test H
PCM U0155:00 Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test I
PCM U0164:00 Lost Communication with HVAC Control Module: No Sub Type Information GO to Pinpoint Test J
PCM U0199:00 Lost Communication with Door A Control Module: No Sub Type Information GO to Pinpoint Test K
PCM U0200:00 Lost Communication with Door B Control Module: No Sub Type Information GO to Pinpoint Test L
PCM U0212:00 Lost Communication with Steering Column Control Module: No Sub Type Information GO to Pinpoint Test E
PCM U0230:00 Lost Communication with Liftgate Module: No Sub Type Information GO to Pinpoint Test M
PCM U023A:00 Lost Communication with Image Processing Module A: No Sub Type Information GO to Pinpoint Test N
PCM U0253:00 Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information GO TO Pinpoint Test O
PCM U0298:00 Communication Error with DC/DC Converter Control Module A: No Sub-type Information GO to Pinpoint Test P
PCM U0405:00 Invalid Data Received from Cruise Control Module: No Sub Type Information GO to Pinpoint Test Q
PCM U0412:00 Invalid Data Received from Battery Energy Control Module A: No Sub-type Information GO to Pinpoint Test Q
PCM U0415:00 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module A: No Sub Type Information GO to Pinpoint Test Q
PCM U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information GO to Pinpoint Test Q
PCM U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information GO to Pinpoint Test Q
PCM U0554:00 Invalid Data Received from Auxiliary Protocol Interface Module: No Sub Type Information GO to Pinpoint Test Q
PCM U0594:00 Incorrect Data Received from Hybrid/EV Powertrain Control Module 'A': No Sub Type Information GO to Pinpoint Test Q
PCM U1011:00 Incorrect Internal Control Module Monitor Data Received from ECM/PCM: No Sub-type Information GO to Pinpoint Test Q
PCM U1012:00 Invalid Internal Control Module Monitor Data Received from Anti-Lock Brake System (ABS) Control Module: No Sub Type Information GO to Pinpoint Test Q
PCM U101E:00 Invalid Internal Control Module Monitor Data Received from Gear Shift Module: No Sub Type Information GO to Pinpoint Test Q
PCM U101F:00 Invalid Internal Control Module Monitor Data Received from Transmission Range Control Module: No Sub-type Information GO to Pinpoint Test Q
PCM U102F:00 Invalid Internal Control Module Monitor Data Received from Four-Wheel Drive Control Module: No Sub Type Information GO to Pinpoint Test Q
PCM U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test QA
PCM U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test QA
PCM U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information GO to Pinpoint Test QA

Pinpoint Tests

The diagnosis described in this manual assumes a certain level of skill and knowledge of Ford diagnostic methods...
Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).


PINPOINT TEST A: U0103

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0103:00 Lost Communication with Gear Shift Control Module A: No Sub Type Information The PCM sets this DTC if data messages from the GSM via the GWM are not present.

Possible Sources

  • Communication network concern
  • GSM
  • GWM
  • PCM
A1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to A2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
A2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the GSM pass the network test?
Yes GO to A3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
A3 PERFORM GSM (GEAR SHIFT MODULE) CONTROL MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the GSM control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
Refer to: External Controls (307-05B Automatic Transmission External Controls - Automatic Transmission - HF45, Diagnosis and Testing).
No GO to A4
A4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to A5
A5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to A6
A6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0103 still present?
Yes GO to A7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
A7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the GSM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to A8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
A8 CHECK THE GSM (GEAR SHIFT MODULE) MODULE FOR PROPER OPERATION
  • Ignition OFF.
  • Disconnect and inspect the GSM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the GSM connector(s). Make sure it is properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM.
Refer to: Gear Shift Module (GSM) (307-05B Automatic Transmission External Controls - Automatic Transmission - HF45, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST B: U0104

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0104:00 Lost Communication with Cruise Control Module: No Sub Type Information The PCM sets this DTC if data messages from the CCM via the GWM are not present.

Possible Sources

  • Communication network concern
  • CCM
  • GWM
  • PCM
B1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to B2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
B2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the CCM pass the network test?
Yes GO to B3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
B3 PERFORM CCM (CRUISE CONTROL MODULE) CONTROL MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the CCM control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
Refer to: Cruise Control (419-03B Cruise Control - Vehicles With Adaptive Cruise Control, Diagnosis and Testing).
No GO to B4
B4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to B5
B5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to B6
B6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0104 still present?
Yes GO to B7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
B7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the CCM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to B8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
B8 CHECK THE CCM (CRUISE CONTROL MODULE) MODULE FOR PROPER OPERATION
  • Ignition OFF.
  • Disconnect and inspect the CCM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the CCM connector(s). Make sure it is properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service information exists to resolve this concern, INSTALL a new CCM.
REFER TO: Cruise Control Module (CCM) (419-03B Cruise Control - Vehicles With: Adaptive Cruise Control, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST C: U0111

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0111:00 Communication lost with Battery Energy Control Module "A": no subtype information The PCM sets this DTC if data messages from the BECM via the GWM are not present.

Possible Sources

  • Communication network concern
  • BECM
  • GWM
  • PCM
C1 CHECK THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to C2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
C2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the BECM pass the network test?
Yes GO to C3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
C3 PERFORM BECM (BATTERY ENERGY CONTROL MODULE) CONTROL MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the BECM control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
Refer to: High Voltage Battery, Mounting and Cables - Hybrid Electric Vehicle (HEV) (414-03A High Voltage Battery, Mounting and Cables, Diagnosis and Testing).
No GO TO C4
C4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to C5
C5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to C6
C6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0103 still present?
Yes GO TO C7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
C7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the BECM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO TO C8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
C8 CHECK BECM (BATTERY ENERGY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the BECM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the CCM connector(s). Make sure it is properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this symptom, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new BECM.
REFER TO: Battery Energy Control Module (BECM) - Hybrid Electric Vehicle (HEV) (414-03A High Voltage Battery, Installation and Cables, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST D: U0121

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0121:00 Lost Communication with Anti-Lock Brake System (ABS) Control Module 'A': No Sub-type Information The PCM sets this DTC if data messages from the ABS module through the GWM are not present.

Possible Sources

  • Communication network concern
  • ABS Module
  • GWM
  • PCM
D1 VERIFY CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to D2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
D2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the ABS module pass the network test?
Yes GO to D3
No
REFER TO: Anti-Lock Brake System (ABS) and Stability Control System (206-09 Anti-Lock Brake System (ABS) and Stability Control System, Diagnosis and Testing).
D3 PERFORM ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the ABS control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Anti-Lock Brake System (ABS) and Stability Control System (206-09 Anti-Lock Brake System (ABS) and Stability Control System, Diagnosis and Testing).
No GO to D4
D4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to D5
D5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to D6
D6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0121 still present?
Yes GO to D7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
D7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the ABS, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to D8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
D8 CHECK ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the ABS control module connector.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the ABS control module connector. Make sure that it is installed and locked correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles exist to resolve this concern, INSTALL a new ABS module.
REFER TO: Hydraulic Control Unit (HCU) - Vehicles With: Vacuum Brake Booster (206-09 Anti-Lock Brake System (ABS) and Stability Control System, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST E: U0126, U0212

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0126:00 Lost Communication with Steering Wheel Angle Sensor Module: No Sub Type Information The PCM sets this DTC if data messages from the SCCM through the GWM are not present.
DTC U0212:00 Lost Communication with Steering Column Control Module: No Sub Type Information The PCM sets this DTC if data messages from the SCCM through the GWM are not present.

Possible Sources

  • Communication network concern
  • SCCM
  • GWM
  • PCM
E1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to E2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
E2 CHECK COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the SCCM module pass the network test?
Yes GO to E3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
E3 PERFORM SCCM (STEERING COLUMN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the SCCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).
No GO to E4
E4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to E5
E5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to E6
E6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0126 or U0212 still present?
Yes GO to E7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
E7 CHECK OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the SCCM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to E8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
E8 CHECK SCCM (STEERING COLUMN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the SCCM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the SCCM connector(s). Make sure that they are installed and locked correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new SCCM.
REFER to: Steering Column Control Module (SCCM) (211-05 Steering Wheel and Column Electrical Components, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST F: U0131

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0131:00 Lost Communication with Power Steering Control Module 'A': No Sub Type Information A continuous memory DTC that is set in the PCM if messages from the PSCM through the GWM are not present.

Possible Sources

  • Communication network concern
  • Battery Voltage Concern
  • GWM
  • PSCM
  • PCM
F1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to F2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault. CLEAR the DTC.
F2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Does the PSCM pass the network test?
Yes GO to F3
No DIAGNOSE the lack of communication with the PSCM.
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
F3 PERFORM PSCM (POWER STEERING CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the PSCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Power Steering (211-02 Power Steering, Diagnosis and Testing).
No GO to F4
F4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to F5
F5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to F6
F6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0131 still present?
Yes GO to F7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
F7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the PSCM module, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to F8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
F8 CHECK PSCM (POWER STEERING CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PSCM module connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the PSCM module connector(s). Make sure that they are installed and locked correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If there are no service articles to resolve this concern,
VIN is required to access the Guided Routine (EPAS)
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST G: U0140

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0140:00 Lost Communication With Body Control Module: No Sub Type Information The PCM sets this DTC if data messages from the BCM module through the GWM are not present.

Possible Sources

  • Communication network concern
  • BCM
  • GWM
  • PCM
G1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to G2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
G2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Does the BCM pass the network test?
Yes GO to G3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
G3 PERFORM BCM (BODY CONTROL MODULE) SELF-TEST
  • Using a scan tool, perform the BCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to G4
G4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to G5
G5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to G6
G6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0136 still present?
Yes GO to G7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
G7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the four-wheel drive module, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to G8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
G8 CHECK 4WD (FOUR-WHEEL DRIVE) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the four-wheel drive module connector.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the all-wheel drive (AWD) module connector(s). Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article applies to this condition, STOP this test and FOLLOW the service article instructions. If no service articles address this condition, INSTALL a new BCM module.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST H: U0151

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0151:00 Lost Communication with Restraints Control Module: No Sub Type Information The PCM sets this DTC when data messages from the RCM through the GWM are not present.

Possible Sources

  • Communication network concern
  • RCM
  • GWM
  • PCM
H1 VERIFY CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to H2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
H2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the RCM pass the network test?
Yes GO to H3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
H3 PERFORM RCM (RESTRAINTS CONTROL MODULE) SELF-TEST
  • Using the diagnostic scanner, perform the RCM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
No GO to H4
H4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, retrieve any BCM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to H5
H5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to H6
H6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0151 still present?
Yes GO to H7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
H7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the RCM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to H8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
H8 CHECK THE RCM (RESTRAINTS CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RCM module connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the RCM module connector(s). Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new RCM.
REFER TO: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST I: U0155

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0155:00 Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information The PCM sets this DTC when data messages from the IPC module through the GWM are not present.

Possible Sources

  • Communication network concern
  • IPC module
  • GWM
  • PCM
I1 VERIFY CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to I2.
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
I2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the IPC module pass the network test?
Yes GO to I3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
I3 PERFORM IPC (INSTRUMENT PANEL CLUSTER) MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the IPC module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to I4
I4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to I5
I5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to I6
I6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0136 still present?
Yes GO to I7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
I7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the four-wheel drive module, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to I8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
I8 CHECK THE AWD (ALL-WHEEL DRIVE) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the four-wheel drive module connector.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the all-wheel drive (AWD) module connector(s). Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article applies to this condition, STOP this test and FOLLOW the service article instructions. If no service articles address this condition, INSTALL a new IPC module.
REFER TO: Instrument Panel Cluster (IPC) (413-01 Instrument Cluster, Message Center and Warning Chimes, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST J: U0164

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0164:00 Lost Communication with HVAC Control Module: No Sub Type Information The PCM sets this DTC when data messages from the HVAC module through the GWM are not present.

Possible Sources

  • Communication network concern
  • HVAC control module
  • GWM
  • PCM
J1 VERIFY CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to J2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
J2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the HVAC module pass the network test?
Yes GO to J3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
J3 PERFORM HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the HVAC control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC)/Electronic Automatic Temperature Control (EATC) (412-00 Climate Control System - General Information, Diagnosis and Testing).
REFER TO: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) (412-00 Climate Control System - General Information, Diagnosis and Testing).
No GO to J4
J4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to J5
J5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to J6
J6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0164 still present?
Yes GO to J7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
J7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the HVAC module, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to J8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
J8 CHECK THE RCM (RESTRAINTS CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the HVAC module connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the HVAC module connector(s). Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSBs, GSBs, SSMs or FSAs.
If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If there are no service articles to resolve this condition, INSTALL a new HVAC control module.
Refer to: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST K: U0199

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0199:00 Lost Communication with Door A Control Module: No Sub Type Information The PCM sets this DTC when data messages from the DDM through the GWM are not present.

Possible Sources

  • Communication network concern
  • DDM module
  • GWM
  • PCM
K1 VERIFY THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to K2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
K2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the DDM pass the network test?
Yes GO to K3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
K3 PERFORM DDM (DRIVER DOOR MODULE) SELF-TEST
  • Using a diagnostic scan tool, perform the DDM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
No GO to K4
K4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to K5
K5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to K6
K6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0199 still present?
Yes GO to K7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
K7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the DDM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to K8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
K8 CHECK THE PDM (PASSENGER DOOR MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the DDM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the DDM connector(s). Make sure they are installed and fully seated.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article applies to this condition, STOP this test and FOLLOW the service article instructions. If no service articles address this condition, INSTALL a new DDM module.
REFER TO: Driver Door Module (DDM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST L: U0200

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
DTC U0200:00 Lost Communication with Door B Control Module: No Sub Type Information The PCM sets this DTC if data messages from the PDM through the GWM are not present.

Possible Sources

  • Communication network concern
  • Passenger Door Module (PDM)
  • GWM
  • PCM
L1 VERIFY THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to L2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
L2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the PDM pass the network test?
Yes GO to L3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
L3 PERFORM PDM (PASSENGER DOOR MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the PDM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
No GO to L4
L4 CHECK GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to L5
L5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to L6
L6 RECHECK PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0200 still present?
Yes GO to L7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
L7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the PDM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to L8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
L8 CHECK PDM (PASSENGER DOOR MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PDM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the PDM connector(s). Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new PDM.
REFER TO: Passenger Door Module (PDM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST M: U0230

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0230:00 Lost Communication with Liftgate Module: No Sub Type Information The PCM sets this DTC if data messages from the RGTM through the GWM are not present.

Possible Sources

  • Communication network concern
  • RKE
  • GWM
  • PCM
M1 CHECK CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to M2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
M2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the RGTM pass the network test?
Yes GO to M3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
M3 PERFORM RGTM (REAR GATE TAILGATE MODULE) MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the RGTM module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Body Closures (501-03 Body Closures, Diagnosis and Testing).
No GO to M4
M4 CHECK GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to M5
M5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to M6
M6 RECHECK PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0230 still present?
Yes GO to M7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
M7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the RGTM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to M8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
M8 CHECK RGTM (REAR GATE TAILGATE MODULE) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the RGTM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the RGTM connector(s). Make sure it is fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RGTM module.
REFER TO: Rear Gate Tailgate Module (RGTM) (501-03 Body Lock, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST N: U023A

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U023A:00 Lost Communication with Image Processing Module A: No Sub Type Information The PCM sets this DTC if data messages from the IPMA through the GWM are not present.

Possible Sources

  • Communication network concern
  • IPMA
  • GWM
  • PCM
N1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to N2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
N2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the IPMA pass the network test?
Yes GO to N3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
N3 PERFORM IPMA (IMAGE PROCESSING MODULE A) SELF-TEST
  • Using the diagnostic scan tool, perform the IPMA self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
Refer to: Lane Keeping System (419-07 Lane Keeping System, Diagnosis and Testing).
No GO to N4
N4 CHECK GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to N5
N5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to N6
N6 RECHECK PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U023A still present?
Yes GO to N7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
N7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the IPMA, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to N8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
N8 CHECK IPMA (IMAGE PROCESSING MODULE A) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the IPMA connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the IPMA connector(s). Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPMA.
REFER TO: Interior Rear View Mirror (501-09 Rear View Mirrors, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST O: U0253:

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0253:00 Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information The PCM sets this DTC if data messages from the APIM through the GWM are not present.

Possible Sources

  • Communication network concern
  • APIM
  • GWM
  • PCM
O1 CONFIRM THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to O2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
O2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Did the APIM pass the network test?
Yes GO to O3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
O3 PERFORM APIM (SYNC MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the APIM self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Information and Entertainment System (415-00 Information and Entertainment System, General Information, Diagnosis and Testing).
No GO to O4
O4 CHECK GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to O5
O5 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to O6
O6 RECHECK PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0253 still present?
Yes GO to O7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
O7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the APIM, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to O8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
O8 CHECK APIM (SYNC MODULE) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect the APIM connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the APIM connector(s). Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new APIM.
REFER to: SYNC Module [APIM] (Information and Entertainment System 415-00 - General Information, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST P: U0298

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for lost communication.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0298:00 Communication Error with DC/DC Converter Control Module A: No Sub-type Information The PCM sets this DTC if data messages from the DC/DC Converter Control Module through the GWM are not present.

Possible Sources

  • Communication network concern
  • DC/DC Converter Control Module
  • GWM
  • PCM
P1 VERIFY THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to P2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault.
P2 CHECK THE NETWORK COMMUNICATION
  • Using a scan tool, perform the network test.

Did the FCIM pass the network test?
Yes GO to P3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
P3 PERFORM DC/DC CONVERTER CONTROL MODULE SELF-TEST
  • Using the diagnostic scan tool, perform the DC/DC converter control module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Direct Current/Direct Current (DC/DC) Converter Control Module (414-05 Voltage Inverter/Converter, Diagnosis and Testing).
No GO to P4
P4 CHECK THE GWM (GATEWAY MODULE A) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, retrieve the GWM diagnostic trouble codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No GO to P5
P5 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform a PCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the PCM DTC Chart in this section.
No GO to P6
P6 RECHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PCM self-test.

Is DTC U0298 still present?
Yes GO to Q7
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
P7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • CHECK the vehicle service history for recent service actions related to the DC/DC converter control module, GWM or PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • HVBOM can be used to verify the correct part installation.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to P8
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
P8 CHECK THE DC/DC CONVERTER CONTROL MODULE FOR PROPER OPERATION
  • Ignition OFF.
  • Disconnect and inspect the DC/DC converter control module connector(s).
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the DC/DC converter control module connector(s). Make sure that it is properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK in OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If there are no service articles to resolve this concern, INSTALL a new DC/DC converter control module.
REFER TO: Direct Current/Direct Current (DC/DC) Converter Control Module (414-05 Voltage Inverter/Converter, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST Q: U0405, U0412, U0415, U0422, U0423, U0554, U0594, U1011, U01012, U101E, U101F

Normal Operation and Fault Symptoms

If the PCM does not receive messages from other modules within a specified period of time, the PCM sets a DTC for invalid data.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM U0405:00 Invalid Data Received from Cruise Control Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the CCM.
PCM U0412:00 Invalid Data Received from Battery Energy Control Module A: No Sub-type Information The PCM sets this DTC when the PCM receives invalid network data from the BECM.
PCM U0415:00 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module A: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the ABS module.
PCM U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the BCM.
PCM U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the IPC module.
PCM U0554:00 Invalid Data Received from Auxiliary Protocol Interface Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the APIM.
PCM U0594:00 Incorrect Data Received from Hybrid/EV Powertrain Control Module 'A': No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the SOBDMC.
PCM U1011:00 Incorrect Internal Control Module Monitor Data Received from ECM/PCM: No Sub-type Information The PCM sets this DTC when the PCM receives invalid network data from the PCM.
PCM U1012:00 Invalid internal monitor data received from the anti-lock brake system (ABS) module: no subtype information The PCM sets this DTC when the PCM receives invalid network data from the ABS module.
PCM U101F:00 Invalid Internal Control Module Monitor Data Received from Transmission Range Control Module: No Sub-type Information The PCM sets this DTC when the PCM receives invalid network data from the TRCM.
PCM U101E:00 Invalid Internal Control Module Monitor Data Received from Gear Shift Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the GSM.
PCM U102F:00 Invalid Internal Control Module Monitor Data Received from Four-Wheel Drive Control Module: No Sub Type Information The PCM sets this DTC when the PCM receives invalid network data from the AWD control module.

Possible Sources

  • Suspect module
Q1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE MODULE SENDING INVALID DATA
  • Using the diagnostic scan tool, perform a self-test on the applicable module sending invalid data.

Are any diagnostic trouble codes (DTCs) present from the module sending invalid data?
Yes CHECK the module sending invalid data. REFER to the appropriate section in the Workshop Manual.
No DIAGNOSE the observed symptom.
PINPOINT TEST R: P1001

Normal Operation and Fault Symptoms

303-06 BEFORE

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P1001:00 KOER Cannot Complete, KOER Aborted: No Sub Type Information This DTC sets when the KOER self-test does not complete within the allotted time.

Possible Sources

  • Incorrect self-test procedure
  • Unexpected response from self-test monitors
  • RPM out of specification
R1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Turn the ignition to the START position.
  • Using a diagnostic scan tool, retrieve and record all diagnostic trouble codes (DTCs).
  • Repair all self-test or continuous memory diagnostic trouble codes (CMDTCs) and clear the DTC(s).
  • Rerun the KOER self-test.

Did DTC P1001 return?
Yes GO to R2
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
R2 REPROGRAM THE PCM (POWERTRAIN CONTROL MODULE)
  • Reprogram the PCM with the latest software.
    REFER TO: Module Programming (418-01 Module Configuration, General Procedures).
  • Rerun the KOER self-test.

Did DTC P1001 return?
Yes
VIN required to access Guided Routine (PCM)
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
PINPOINT TEST S: P166A

Normal Operation and Fault Symptoms

REFER TO: Engine - Overview (Engine 303-01C, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P166A:00 Restraint Deployment Communication Circuit: No Sub Type Information This DTC sets when the PCM detects an open or short circuit in the IES circuit.

Possible Sources

  • BCM
  • Wiring, Terminals or Connectors
S1 DIAGNOSE THE CONCERN USING THE PC/ED (POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS) MANUAL
  • Diagnose the concern using the PC/ED manual test.

Did the PC/ED diagnosis direct you to install a new BCM?
Yes INSTALL a new BCM. Refer to the appropriate removal and installation procedure in Section 419-10.
No The concern was resolved using the PC/ED manual test.
PINPOINT TEST T: P1A0C

Refer to Cell 25 of the Electrical Schematics for circuit and connector information.

Normal Operation and Fault Symptoms

Informational diagnostic trouble codes (DTCs) are the result of a limited operating strategy (LOS) or failure mode effects management (FMEM) operating strategy, which maintains limited vehicle function in the event of a concern with the PCM, TCM, BECM or a component.

Circuit diagnostic trouble codes (DTCs) may be accompanied by informational diagnostic trouble codes (DTCs) and must be diagnosed first. An informational DTC without a circuit DTC may or may not indicate an actual concern and must be diagnosed as a symptom.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P1A0C:00 Hybrid Transmission Control Module Engine Disabled: No Sub Type Information Informational diagnostic trouble code that is set in the PCM when the failure mode effects management (FMEM) operating strategy maintains limited vehicle function in the event of a concern with the PCM, TCM, BECM or a component.

Possible Sources

  • Air leak between the mass air flow sensor and the electronic throttle body (ETB)
  • TP sensor installed incorrectly
  • Powertrain or hybrid electric system
  • PCV system
  • Mass air flow sensor
  • Throttle position sensor
  • EVAP purge valve stuck open
T1 CHECK FOR ANY DIAGNOSTIC TROUBLE CODES (DTCS) OTHER THAN THE INFORMATIONAL DTC
  • Using the diagnostic scan tool, retrieve all Diagnostic Trouble Codes (DTCs).

Are there any PCM diagnostic trouble codes (DTCs) other than P1A0C or SOBDMC DTC P1A0C?
Yes Disregard the current DTC at this time.
No GO to T2
T2 ENTER ENGINE RUNNING DIAGNOSTIC MODE
  • Place the vehicle in PARK.
  • Press the START button to enter ACCESSORY mode.
  • Press the brake pedal and the accelerator pedal together for 5 seconds.
  • NOTE: Steps 4 and 5 must be completed within 15 seconds of completing step 3. Release the accelerator and brake pedals.
  • Press the brake pedal and press the START button to place the vehicle in the RUN state.
  • Press the brake pedal and the accelerator pedal together for 5 seconds.
  • NOTE: The READY TO DRIVE or DRIVE indicator must flash on the instrument cluster at regular intervals when the engine running diagnostic mode is active. Let the engine idle for 1 minute.

Has the engine been running for at least one minute?
Yes PERFORM a complete OBD drive cycle.
REFER TO: Electronic Engine Controls - System Operation and Component Description (303-14C Electronic Engine Controls, Description and Operation).
CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T3
T3 CHECK THE INTAKE AIR SYSTEM FOR LEAKS, OBSTRUCTIONS OR DAMAGE
  • Ignition OFF.
  • Inspect the intake air system for the following:
    • clogged or restricted air filter, housing and tubes
    • broken or loose air outlet tube clamps, cracks or holes in the air outlet tube
    • worn gaskets between the MAF/IAT sensor and the air cleaner assembly
    • loose or disconnected MAF/IAT sensor connector
    • sludge in the electronic throttle body (ETB)

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T4
T4 CHECK VPWR PID (PARAMETER IDENTIFICATION)
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).

  • Access the PCM and monitor the VPWR (V) PID


Is the PID value between 10.5 and 17 V?
Yes GO to T5
No
REFER TO: Powertrain Control Module (PCM) Inputs and Outputs (303-14C Electronic Engine Controls, Diagnosis and Testing).
Precision Test PPT B
T5 CHECK THE FUEL LEVEL
  • Using a diagnostic scan tool, view the PCM Parameter Identifications (PIDs).

  • Access the PCM and monitor the FLI (%) PID


Is the PID value greater than 15%?
Yes GO to T6
No ADD fuel to the fuel tank until the PID exceeds 15%. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
T6 CHECK THE ENGINE OIL LEVEL
  • Park the vehicle on a level surface.
  • Ignition OFF.
  • Check the engine oil level.

Is the engine oil level correct?
Yes GO to T7
No REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
T7 CHECK THE ELECTRONIC THROTTLE BODY (ETB)
  • Inspect the electronic throttle body (ETB) for damage to the body, connector or wiring harness.
  • Inspect the Throttle Actuator Control Module (TACM) wiring at the electronic throttle body (ETB) connector for chafing.

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T8
T8 CHECK THE PCV (POSITIVE CRANKCASE VENTILATION) VALVE
  • Inspect the PCV valve, hoses and connections for leaks and binding.
  • Make sure the PCV valve part number is correct.
  • Make sure the PCV valve is clean.
  • Make sure the fresh air tube and related hoses are clean and correctly routed.
  • Disconnect the PCV valve and shake the valve to make sure it rattles.

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T9
T9 CHECK THE SECONDARY IGNITION SYSTEM
  • Inspect the ignition coils to make sure they are connected correctly.
  • Inspect the wiring harness and connectors for damage.
  • Make sure the vehicle battery is in good condition and all accessories are off.
  • Remove and inspect the spark plugs for damage, wear, carbon fouling or deposits, and adjust the spark plug gap.
    REFER TO: Spark Plugs (303-07C Engine Ignition, Removal and Installation).
  • Inspect the coil boots for holes, cracks or white marks that may indicate arcing.

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T10
T10 CHECK THE EXHAUST SYSTEM FOR RESTRICTIONS
  • Ignition OFF.
  • Check the following for damage or restrictions:
    • front and rear exhaust pipes
    • catalytic converter
    • muffler and tailpipe assembly

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC diagnostic trouble codes (DTCs). REPEAT the self-test.
No GO to T11
T11 CHECK THE FUEL SYSTEM
  • Ignition OFF.
  • Relieve the fuel pressure.
    REFER TO: Fuel Pressure Relief (310-00C Fuel System - General Information, General Procedures).
  • Connect a mechanical fuel pressure gauge.
  • KOEO
  • Increase the fuel pressure.
    REFER TO: Fuel Pressure Relief (310-00C Fuel System - General Information, General Procedures).
  • Turn the ignition on and off several times to fill the fuel system.

Is the fuel system pressure greater than 240 kPa (35 psi)?
Yes GO to T12
No
REFER TO: Fuel Tank and Lines (310-01C Fuel Tank and Lines, Diagnosis and Testing).
Precision Test HC
T12 CHECK THE EVAP (EVAPORATIVE EMISSIONS) SYSTEM FOR A STUCK OPEN OR CLOSED EVAP PURGE VALVE
  • Disconnect the EVAP purge valve fuel vapor line from the intake manifold, and plug the line at the EVAP purge valve.
  • KER

Does the engine start and maintain idle?
Yes
REFER TO: Evaporative Emissions (303-13C Evaporative Emissions, Diagnosis and Testing).
Hard Start HX Pinpoint Test OBSERVE the symptoms without diagnosing Diagnostic Trouble Codes (DTCs).
No GO to T13
T13 CHECK THE TRANSMISSION FLUID LEVEL
  • Check the transmission fluid level.
    REFER TO: Transmission Fluid Level Check (307-01B Automatic Transmission — Automatic Transmission — HF45, General Procedures).

Is there a concern?
Yes REPAIR as necessary. CLEAR the PCM and SOBDMC Diagnostic Trouble Codes (DTCs). REPEAT the self-test.
No
REFER TO: Powertrain Control Module (PCM) Inputs and Outputs (303-14C Electronic Engine Controls, Diagnosis and Testing).
Pinpoint Test Z
PINPOINT TEST QA: UNABLE TO ACTIVATE SELF-TEST / COMMUNICATION NETWORK FAULT
Introduction

Normal Operation and Fault Symptoms

Refer to DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PCM P0602:00 Powertrain Control Module Programming Error: no subtype information Set when the PCM detects a programming error in the Vehicle Identification Data (VID) block.
PCM P0604:00 Internal Control Module Random Access Memory (RAM) Error: No Sub Type Information Set when the PCM detects RAM corruption. Reprogram or update the calibration. Check for other Diagnostic Trouble Codes (DTCs) or drive symptoms for further action. Check for aftermarket performance products.
PCM P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub-type Information Set when the PCM detects that the ROM is corrupted. Reprogram the Vehicle Identification Data (VID) block. Check for other Diagnostic Trouble Codes (DTCs) or drive symptoms for further action. Check for aftermarket performance products. Refer to Flash EEPROM, Programming the VID Block for PCM replacement.
PCM P0606:00 Control Module Processor: No Sub-type Information Set when the PCM detects an internal communication error. Reprogram or update the calibration. Check for other Diagnostic Trouble Codes (DTCs) and diagnose them first. Check for aftermarket products. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P0607:00 Control Module Performance: No Sub-type Information Set when the PCM detects an internal central processing unit (CPU) error. The PCM monitors itself and performs internal checks of its own processor. This DTC sets if any of these checks returns an incorrect value. Reprogram or update the calibration. Check for other Diagnostic Trouble Codes (DTCs) and diagnose them first. Check for aftermarket products. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P0610:00 Control Module Vehicle Options Error: No Sub Type Information Set when the PCM detects that one or more fields of the PCM VID block are configured incorrectly. Reprogram or update the calibration. Check for other Diagnostic Trouble Codes (DTCs) or drive symptoms for further action. Check for aftermarket performance products.
PCM P061E:00 Internal Control Module Brake Signal Characteristics: No Sub Type Information Set when the PCM detects that it is receiving an incorrect BPP sensor signal. This DTC also sets when an internal communication error occurs in the PCM. Check that the BPP sensor is configured correctly. Refer to Section 417-01, Exterior Lighting. Check for other DTCs and diagnose them first. Check for aftermarket products. Clear the DTCs, repeat the self-test.
PCM P062F:00 Internal Control Module EEPROM Error: No Sub Type Information Set when the PCM detects that the Read Only Memory (ROM) is corrupted. Check for other Diagnostic Trouble Codes (DTCs) and diagnose them first. Check for aftermarket products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test. If the DTC is read again, perform a PATS passive reset. Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test.
PCM P0630:00 VIN Not Programmed or Mismatched - ECM/PCM: No Sub Type Information Set when the PCM detects VID data outside the specified acceptable range. The PCM did not receive a valid Vehicle Identification Number (VIN) during reprogramming. Check for all other module Diagnostic Trouble Codes (DTCs) or related symptoms. Diagnose all other module DTCs before diagnosing this DTC. Reprogram the BCM, instrument cluster and PCM using the embedded data. Refer to Flash EEPROM, Programming the VID Block for PCM replacement, reprogram the PCM.
PCM P064F:00 Unauthorized Software/Calibration Detected: No Sub Type Information Set when the PCM detects an unauthorized calibration.
PCM P160A:00 Control Module Vehicle Configuration Options Reconfiguration Error: No Sub Type Information Set when the PCM detects a mismatch of configuration data and programmable parameters between the PCM and the BCM. Reprogram or update the calibration. If the PCM already has the latest calibration, perform the Relearn Vehicle Data procedure with the scan tool. Check for other Diagnostic Trouble Codes (DTCs) or drive symptoms for further action.
PCM P161C:00 Engine Auto Shutdown Mismatch with Vehicle Configuration: No Sub Type Information Set when the IPC detects a mismatch of configuration data and programmable parameters between the PCM and the IPC.
PCM P1635:00 Bus/Axle Out of Range: No Sub Type Information Set when the PCM detects that the axle and tire information contained in the Vehicle Identification Data (VID) block does not match the vehicle hardware. Using the diagnostic tool, review the tire and axle parameters in the VID block. They must match the vehicle hardware.
PCM P1639:00 Vehicle Identifier Block Corrupt, Not Programmed: No Sub Type Information Set when the PCM detects that the VID block is not programmed or the information in it is corrupted. Program the PCM to the latest available calibration. The VID block must be programmed. Refer to Flash EEPROM, Changing the VID Block.
PCM P1935:00 Brake switch/sensor signal: no sub-type information Set when the PCM does not receive an ABS message within a specified amount of time. The PCM continuously monitors CAN messages from the ABS module. Check for other ABS Diagnostic Trouble Codes (DTCs) or ABS-related symptoms. Diagnose all other ABS Diagnostic Trouble Codes (DTCs) or ABS-related symptoms first.
PCM P264F:00 Engine Serial Number Not Programmed or Mismatched: No Sub Type Information Set when the PCM does not receive a valid engine serial number during reprogramming. The VID block must be programmed. Refer to Flash EEPROM, Programming VID Block. If the PCM does not allow the VID block to be reprogrammed, PCM replacement is required.
PCM up to 21:00 Initial Configuration Not Complete: No Sub Type Information Set when the PCM detects a programming error in the vehicle identification (VID) block. Program the VID block. Refer to Flash EEPROM, Changing the VID Block. If the PCM does not allow the VID block to be reprogrammed, PCM replacement is required.
PCM U2101:00 Control Module Configuration Incompatible: No Sub Type Information Set when the PCM detects RAM corruption. Reprogram or update the calibration. Check for other diagnostic trouble codes (DTCs) or symptoms to determine further action. Check the performance of aftermarket products. Refer to Flash EEPROM, Programming VID Block for PCM Replacement.
PCM U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information Set when the PCM detects a programming error in the vehicle identification (VID) block. Program the VID block. Refer to Flash EEPROM, Changing the VID Block. If the PCM does not allow the VID block to be reprogrammed, PCM replacement is required.

Possible Sources

  • Network communication fault
  • PCM

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