Ford Explorer Quiz
Electrical

Diagnosis and Testing - Pedestrian Alert System

In this manual: Electrical
General Information — 41Chassis — 173Powertrain — 250Electrical — 303Body and Paint — 331
~25min 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).


Diagnostic Trouble Code Chart


Module Trouble Code Description Action
PAKM B1A01:01 Speaker No. 1: General Electrical Failure GO to Pinpoint Test C
PAKM B1A01:11 Speaker No. 1: Short to Ground GO to Pinpoint Test C
PAKM B1A01:12 Speaker No. 1: Short to Battery GO to Pinpoint Test D
PAKM B1A01:13 Speaker No. 1: Open Circuit GO to Pinpoint Test D
PAKM B1A02:01 Speaker No. 2: General Electrical Failure GO to Pinpoint Test C
PAKM B1A02:11 Speaker No. 2: Short to Ground GO to Pinpoint Test C
PAKM B1A02:12 Speaker No. 2: Short to Battery GO to Pinpoint Test D
PAKM B1A02:13 Speaker No. 2: Open Circuit GO to Pinpoint Test D
PAKM U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information GO to Pinpoint Test E
PAKM U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test F
PAKM U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information GO to Pinpoint Test G
PAKM U201A: 51 Control Module Primary Calibration Data: Not Programmed GO to Pinpoint Test H
PAKM U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test H
PAKM U3000:41 Control Module: General Checksum Failure GO to Pinpoint Test I
PAKM U3000:42 Control Module: General Memory Failure GO to Pinpoint Test I
PAKM U3000:96 Control Module: Internal Component Failure GO to Pinpoint Test I
PAKM U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test J
PAKM U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test K

Symptom 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).


Symptom Chart


Condition Action
Pedestrian Alert System Inoperative GO to Pinpoint Test A
Distorted Sound GO to Pinpoint Test B
Poor Speaker Volume GO to Pinpoint Test A

Pinpoint Tests


PINPOINT TEST A: PEDESTRIAN ALERT SYSTEM INOPERATIVE

Normal Operation and Fault Symptoms

Refer to Pedestrian Alert System Description and Operation (413-22 Pedestrian Alert System, Description and Operation).

The PACM receives constant battery power from the BCM. The PACM receives the ignition status message for the RUN/START or ACC position from the BCM through the GWM over HS-CAN3.

Possible Sources

  • Fuse
  • Communication Problem
  • PAKM
A1 PERFORM NETWORK TEST FOR ALL MODULES
  • Using a scan tool, perform the network test.

Do all equipped modules pass the network test?
Yes GO to A2
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
A2 PERFORM PACM (PEDESTRIAN ALERT CONTROL MODULE) MODULE SELF-TEST
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM module self-test.
  • Check for stored Diagnostic Trouble Codes (DTCs) from the PACM module self-test.

Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER TO: PACM DTC Chart in this section.
No GO to A3
A3 CHECK SPEAKER OPERATION
  • Install a known good speaker.
    REFER TO: Pedestrian Alert Speaker (413-22 Pedestrian Alert System, Removal and Installation).
  • NOTE: Make sure the vehicle is operating in electric mode (engine not running). Drive the vehicle in forward gear between 0-30 km/h (0-8 mph) and check whether the Pedestrian Alert audible warning operates.

Does the Pedestrian Alert speaker operate?
Yes INSTALL a new audible warning.
REFER TO: Pedestrian Alert Speaker (413-22 Pedestrian Alert System, Removal and Installation).
No REINSTALL the original audible warning. INSTALL a new PACM.
REFER TO: Pedestrian Alert Control Module (PACM) (413-22 Pedestrian Alert System, Removal and Installation).
PINPOINT TEST B: DISTORTED SOUND

Normal Operation and Fault Symptoms

The front and rear audible alert speakers are controlled by the PACM. A distorted sound is often caused by debris around the speaker area or the speaker itself.

Possible Sources

  • Debris around speaker
  • Front Acoustic Warning Speaker
  • Rear Sonar
B1 INSPECT THE SPEAKER
  • INSPECT and REMOVE all debris around the speaker.

Is there debris around the speaker?
Yes CLEAN debris from the speaker area.
No INSTALL a new audible warning.
REFER TO: Pedestrian Alert Speaker (413-22 Pedestrian Alert System, Removal and Installation).
PINPOINT TEST C: B1A01:01, B1A01:11, B1A02:01, B1A02:11

For circuit and connector information, refer to Wiring Diagrams Cell 146.

Normal Operation and Fault Symptoms

The PACM controls the output of the front and rear speakers through a hardwired circuit and sets Diagnostic Trouble Codes (DTCs) when a circuit or speaker fault is detected.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM B1A01:01 Speaker No. 1: General Electrical Failure On-demand DTC that sets when the PACM detects a short to battery in the front audible warning speaker signal or return circuit.
PACM B1A01:11 Speaker No. 1: Short to Ground On-demand DTC that sets when the PACM detects a short to ground in the front audible warning speaker signal or return circuit.
PACM B1A02:01 Speaker No. 2: General Electrical Failure On-demand DTC that sets when the PACM detects a short to battery in the rear audible warning speaker signal and return circuits.
PACM B1A02:11 Speaker No. 2: Short to Ground On-demand DTC that sets when the PACM detects a short to ground in the rear audible warning speaker signal or return circuit.

Possible Sources

  • Wiring, Terminals or Connectors
  • Front Acoustic Warning Speaker
  • Rear Sonar
  • PAKM

Visual Inspection and Pre-checks

  • Inspect the speaker connector for corrosion. Install a new connector or terminals. Clean the module contacts.
  • Inspect the speaker connector for damaged or bent pins. Install new pins/contacts as necessary.
  • Inspect the speaker connector for backed-out pins. Install new pins as necessary.
C1 PERFORM PACM (PEDESTRIAN ALERT CONTROL MODULE) MODULE SELF-TEST
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM module self-test.
  • Check for stored Diagnostic Trouble Codes (DTCs) from the PACM module self-test.

Is DTC B1A01:01 or B1A02:01 stored?
Yes GO to C2
No GO TO C4
C2 CHECK THE AUDIBLE WARNING FOR AN INTERNAL SHORT TO BATTERY
  • Ignition OFF.
  • Disconnect the front audible warning speaker C1945 (DTC B1A01:01).
  • Disconnect the rear audible warning speaker C4526 (DTC B1A02:01).
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM module self-test.
  • NOTE: DTC B1A01:01 or B1A02:01 may also be present while performing this step, and should be ignored at this time. Check for stored Diagnostic Trouble Codes (DTCs) from the PACM module self-test.

Is DTC B1A01:13 or B1A02:13 stored?
Yes INSTALL a new audible warning. REFER TO: Pedestrian Alert Speaker Removal and Installation.
No GO to C3
C3 CHECK THE AUDIBLE WARNING SIGNAL AND RETURN CIRCUIT FOR A SHORT TO BATTERY TOGETHER
  • Ignition OFF.
  • Disconnect PACM C4525.
  • Action:
    Click to display the connectors

    Front audible warning speaker (DTC B1A01:01)


    Lead 1 Measurement/Action Lead 2
    C4525-9 C4525-8

    Click to display the connectors

    Rear audible warning speaker (DTC B1A02:01)


    Lead 1 Measurement/Action Lead 2
    C4525-11 C4525-10

Is the resistance greater than 10000 Ohms?
Yes GO to C6
No REPAIR the circuits.
C4 CHECK THE WARNING SIGNAL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect PACM C4525.
  • Disconnect the front audible warning speaker C1945 (DTC B1A01:11).
  • Disconnect the rear audible warning speaker C4526 (DTC B1A02:11).
  • Action:
    Click to display the connectors

    Front audible warning speaker (DTC B1A01:11)


    Lead 1 Measurement/Action Lead 2
    C4525-9 Ground

    Click to display the connectors

    Rear audible warning speaker (DTC B1A02:11)


    Lead 1 Measurement/Action Lead 2
    C4525-11 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to C5
No REPAIR the circuit.
C5 CHECK THE AUDIBLE WARNING RETURN CIRCUIT FOR A SHORT TO GROUND
  • Action:
    Click to display the connectors

    Front audible warning speaker (DTC B1A01:11)


    Lead 1 Measurement/Action Lead 2
    C4525-8 Ground

    Click to display the connectors

    Rear audible warning speaker (DTC B1A02:11)


    Lead 1 Measurement/Action Lead 2
    C4525-10 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to C6
No REPAIR the circuit.
C6 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PACM and 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
  • Reconnect the PACM connector. Make sure it is fully seated and clicks into place.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service bulletins: TSB, GSB, SSM or FSA. If a service bulletin exists for this condition, STOP this test and FOLLOW the service bulletin instructions. If no service bulletins exist, INSTALL a new PACM.
REFER TO: Pedestrian Alert Control Module (PACM) (413-22 Pedestrian Alert 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 D: B1A01:12, B1A01:13, B1A02:12, B1A02:13

For circuit and connector information, refer to Wiring Diagrams Cell 146.

Normal Operation and Fault Symptoms

The PACM controls the output of the front and rear speakers through a hardwired circuit and sets Diagnostic Trouble Codes (DTCs) when a circuit or speaker fault is detected.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM B1A01:12 Speaker No. 1: Short to Battery On-demand DTC that is set when the PACM detects a short to voltage on the front audible warning signal or return circuit.
PACM B1A01:13 Speaker No. 1: Open Circuit On-demand DTC that is set when the PACM detects an open in the front audible warning signal or return circuit.
PACM B1A02:12 Speaker No. 2: Short to Battery On-demand DTC that is set when the PACM detects a short to voltage on the rear audible warning signal or return circuit.
PACM B1A02:13 Speaker No. 2: Open Circuit On-demand DTC that is set when the PACM detects an open in the rear audible warning signal or return circuit.

Possible Sources

  • Wiring, Terminals or Connectors
  • Front Acoustic Warning Speaker
  • Rear Sonar
  • PAKM

Visual Inspection and Pre-checks

  • Inspect the speaker connector for corrosion. Install a new connector or terminals. Clean the module contacts.
  • Inspect the speaker connector for damaged or bent pins. Install new pins/contacts as necessary.
  • Inspect the speaker connector for backed-out pins. Install new pins as necessary.
D1 PERFORM THE PACM (PEDESTRIAN ALERT CONTROL MODULE) MODULE SELF-TEST
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM module self-test.
  • Check for stored Diagnostic Trouble Codes (DTCs) from the PACM module self-test.

Is DTC B1A01:12 or B1A02:12 recorded?
Yes GO to D2
No GO to D4
D2 CHECK THE AUDIBLE WARNING FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect PACM C4525.
  • The ignition is on.
  • Action:
    Click to display the connectors

    Front audible warning (DTC B1A01:12)


    Lead 1 Measurement/Action Lead 2
    C4525-9 Ground

    Click to display the connectors

    Rear audible warning (DTC B1A02:12)


    Lead 1 Measurement/Action Lead 2
    C4525-11 Ground

Is there voltage present?
Yes GO to D3
No GO to D7
D3 CHECK THE AUDIBLE WARNING FOR A SHORT TO VOLTAGE WITH THE AUDIBLE WARNING DISCONNECTED
  • Ignition OFF.
  • Disconnect the front audible warning C1945 (DTC B1A01:12).
  • Disconnect the rear audible warning C4526 (DTC B1A02:12).
  • Action:
    Click to display the connectors

    Front audible warning (DTC B1A01:12)


    Lead 1 Measurement/Action Lead 2
    C4525-9 Ground

    Click to display the connectors

    Rear audible warning (DTC B1A02:12)


    Lead 1 Measurement/Action Lead 2
    C4525-11 Ground
  • The ignition is on.

Is there voltage present?
Yes REPAIR the signal circuit.
No REPAIR the return circuit.
D4 CHECK THE SIGNAL CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect the front audible warning C1945 (DTC B1A01:13).
  • Disconnect the rear audible warning C4526 (DTC B1A02:13).
  • Install the fused jumper wire:
    Click to display connectors

    Front audible warning (DTC B1A01:13)


    Lead 1 Measurement/Action Lead 2
    C1945-1 C1945-2

    Click to display the connectors

    Rear audible warning (DTC B1A02:13)


    Lead 1 Measurement/Action Lead 2
    C4526-1 C4526-2
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM module self-test.
  • NOTE: DTC B1A01:13 or B1A02:13 may also be present when performing this step, and should be ignored at this time. Check for recorded diagnostic trouble codes (DTCs) from the PACM module self-test.

Is DTC B1A01:11 or B1A02:11 recorded?
Yes REMOVE the fuse jumper.
REFER TO: Pedestrian Alert Speaker (413-22 Pedestrian Alert System, Removal and Installation).
No REMOVE the fuse jumper. GO to D5
D5 CHECK THE AUDIBLE WARNING SIGNAL CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect PACM C4525.
  • Action:
    Click to display the connectors

    Front audible warning (DTC B1A01:13)


    Lead 1 Measurement/Action Lead 2
    C4525-9 C1945-1

    Click to display the connectors

    Rear audible warning (DTC B1A02:13)


    Lead 1 Measurement/Action Lead 2
    C4525-11 C4526-1

Is the resistance less than 3 ohms?
Yes GO to D6
No REPAIR the faulty circuit.
D6 CHECK THE AUDIBLE WARNING RETURN CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors

    Front audible warning (DTC B1A01:13)


    Lead 1 Measurement/Action Lead 2
    C4525-8 C1945-2

    Click to display the connectors

    Rear audible warning (DTC B1A02:13)


    Lead 1 Measurement/Action Lead 2
    C4525-10 C4526-2

Is the resistance less than 3 ohms?
Yes GO to D7
No REPAIR the faulty circuit.
D7 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PACM and 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
  • Reconnect the PACM connector. Make sure it is fully seated and clicks into place.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service bulletins: TSB, GSB, SSM or FSA. If a service bulletin exists for this condition, STOP this test and FOLLOW the service bulletin instructions. If no service bulletins exist, INSTALL a new PACM.
REFER TO: Pedestrian Alert Control Module (PACM) (413-22 Pedestrian Alert 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.
DIAGNOSTIC PINPOINT TEST E: U0100:00

Normal Operation and Fault Symptoms

The PACM communicates with the PCM via HS-CAN1.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information Set on demand and stored in continuous memory in the PACM if data messages from the PCM through the GWM are absent for 5 seconds or longer.

Possible Sources

  • Communication Problem
  • PCM
  • PACM concern
E1 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform the PACM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Repeat the PACM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK all non-network diagnostic trouble codes (DTCs). REFER TO the DTC Chart: PACM Module in this section.
No GO to E2
E2 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON ENGINE OFF) SELF-TEST
  • Using the diagnostic scan tool, perform the PCM KOEO self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK all non-network diagnostic trouble codes (DTCs). REFER TO the Global DTC Chart.
No GO to E3
E3 RECHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the PACM diagnostic trouble codes (DTCs).
  • Ignition OFF.
  • The ignition is on.
  • Wait 10 seconds.
  • Using a scan tool, perform a continuous memory self-test.
  • Check the PACM diagnostic trouble codes (DTCs).

Is DTC U0100:00 still present?
Yes GO to E4
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.
E4 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions involving the PCM or PACM. From the recent service history, found:
    • make sure the correct replacement module was installed
      • Vehicle component assembly may be used to verify correct component 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 E5
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
E5 CHECK THE PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and check the PCM.
  • 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 PCM connectors. 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 article exists for this concern,
Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint test.
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.
DIAGNOSTIC PINPOINT TEST F: U0140:00

Normal Operation and Fault Symptoms

The PACM communicates with the BCM via HS-CAN1.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U0140:00 Lost Communication With Body Control Module: No Sub Type Information Set on demand and stored in continuous memory in the PACM if data messages from the BCM are absent for 5 seconds or longer.

Possible Sources

  • Communication Problem
  • BCM
  • PACM concern
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 CLEAR the DTC. The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.
F2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Does the BCM pass the network test?
Yes GO to F3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
F3 PERFORM THE PACM (PEDESTRIAN ALERT CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the PACM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes REFER TO: PACM DTC Chart in this section.
No GO to F4
F4 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
  • Using a scan tool, perform the BCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the Powertrain Diagnostic Trouble Code Index.
No GO to F5
F5 RECHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the PACM diagnostic trouble codes (DTCs).
  • Ignition OFF.
  • The ignition is on.
  • Wait 10 seconds.
  • Using a scan tool, perform a continuous memory self-test.
  • Check the PACM diagnostic trouble codes (DTCs).

Is DTC U0140:00 still present?
Yes GO to F6
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.
F6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK PROBLEMS
  • CHECK the vehicle service history for recent service actions related to the BCM or PACM. If recent service history is found:
    • make sure the correct replacement module was installed
      • Vehicle component assembly may be used to verify correct component 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 F7
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
F7 CHECK BCM (BODY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the BCM connectors.
  • 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 BCM connectors. 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 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 article exists, INSTALL a new BCM.
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.
DIAGNOSTIC PINPOINT TEST G: U0422:00

Normal Operation and Fault Symptoms

The PACM receives ignition status data from the BCM via HS-CAN1.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U0422:00 Incorrect Data Received from Body Control Module: No Sub Type Information This DTC is set when the PACM receives invalid ignition data from the PCM.

Possible Sources

  • BCM concern
G1 CHECK THE NON-NETWORK DIAGNOSTIC TROUBLE CODES SET IN THE BCM (BODY CONTROL MODULE)
  • The ignition is on.
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a scan tool, perform the BCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes Refer to the Powertrain Diagnostic Trouble Code Index.
No DIAGNOSE the observed symptom.
DIAGNOSTIC PINPOINT TEST H: U201A:51, U2101:00

Normal Operation and Fault Symptoms

The PACM sets diagnostic trouble codes when the PMI is not complete or if incorrect module configuration is present.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U201A:51 Control Module Primary Calibration Data: Not Programmed This DTC is set in the PACM due to incomplete or incorrect PMI procedures.
PACM U2101:00 Control Module Configuration Incompatible: No Sub Type Information This DTC is set in the PACM due to incomplete or incorrect PMI procedures.

Possible Sources

  • PACM programming concern
H1 CHECK THE RECENT SERVICE HISTORY
  • The ignition is on.
  • Check the vehicle service history for recent service actions involving the PACM.

Were any recent service actions performed involving the PACM?
Yes PROGRAM the PACM using the original data.
REFER TO: Module Programming (418-01 Module Configuration, General Procedures).
No INSTALL a new PACM if module programming cannot be saved.
REFER TO: Pedestrian Alert Control Module (PACM) (413-22 Pedestrian Alert System, Removal and Installation).
PINPOINT TEST I: U3000:41, U3000:42, U3000:96

Normal Operation and Fault Symptoms

The PACM monitors the internal memory and programming memory status and sets diagnostic trouble codes when a problem occurs.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U3000:41 Control Module: General Checksum Failure This DTC sets when there is an internal programming checksum problem in the PACM.
PACM U3000:42 Control Module: General Memory Failure This DTC sets when there is an internal memory problem in the PACM.
PACM U3000:96 Control Module: Internal Component Failure This DTC sets when there is an internal problem in the PACM.

Possible Sources

  • PACM Internal Fault
I1 RECHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using the diagnostic scan tool, perform the PACM self-test.

Is DTC U3000:41, U3000:42 or U3000:96 still present?
Yes INSTALL a new PACM.
Refer to: Pedestrian Alert Control Module (PACM) (Pedestrian Alert System 413-22, Removal and Installation).
No The PACM is currently operating correctly. The concern may have been caused by a temporary low battery condition.
DIAGNOSTIC TEST J: U3003:16

For circuit and connector information, refer to Wiring Diagrams Cell 146.

Normal Operation and Fault Symptoms

The PACM monitors the battery voltage and sets a DTC when the operating voltage is low.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U3003:16 Battery Voltage: Circuit Voltage Below Threshold Set in the PACM in continuous memory if the PACM detects battery voltage below 9 volts on the power supply circuit for 50 milliseconds or longer.

Possible Sources

  • Wiring, Terminals or Connectors
  • High Circuit Resistance
  • Charging System Concern
  • PAKM
J1 RECHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using the diagnostic scan tool, perform the PACM self-test.

IS DTC U3003:16 STILL PRESENT?
Yes GO to J2
No The system is currently operating correctly. The DTC may have been set due to a previous low battery voltage condition.
J2 CHECK THE CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE BCM (BODY CONTROL MODULE)
  • Using a scan tool, perform the BCM self-test.

Are any charging system diagnostic trouble codes (DTCs) recorded?
Yes Refer to the Powertrain Diagnostic Trouble Code Index.
No GO to J3
J3 CHECK THE BATTERY CONDITION AND CHARGE
  • Check the battery condition and make sure the battery is fully charged.
    REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery in good condition and fully charged?
Yes GO to J4
No If the battery is discharged, IDENTIFY the cause of the low battery charge.
REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing). If the battery condition is unsatisfactory, INSTALL a new battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).
J4 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) VOLTAGE PID (PARAMETER IDENTIFICATION)
  • Measure and record the battery voltage.
  • Using the diagnostic scan tool, review the PACM parameter identification (PID) values.
  • Monitor the PACM voltage (MODULE_VOLT) PID

Is the voltage within 0.2 volts of the recorded battery voltage?
Yes GO to J7
No GO to J5
J5 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) VOLTAGE
  • Ignition OFF.
  • Disconnect PACM C4525.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4525-6 Ground

Is the voltage greater than 11 volts?
Yes GO to J6
No REPAIR the circuit for high resistance.
J6 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) GROUND
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4525-6 C4525-1

Is the voltage greater than 11 volts?
Yes GO to J7
No REPAIR the circuit for high resistance.
J7 CHECK THE PACM (PEDESTRIAN ALERT CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the PACM 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
  • Reconnect the PACM connector. Make sure it is fully seated and clicks into place.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service bulletins: TSB, GSB, SSM or FSA. If a service bulletin exists for this condition, STOP this test and FOLLOW the service bulletin instructions. If no service bulletins exist, INSTALL a new PACM.
REFER TO: Pedestrian Alert Control Module (PACM) (413-22 Pedestrian Alert 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.
DIAGNOSTIC TEST K: U3003:17

Normal Operation and Fault Symptoms

The PACM monitors the battery voltage and sets a DTC when the operating voltage is high.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
PACM U3003:17 Battery Voltage: Circuit Voltage Above Threshold Set in the PACM in continuous memory if the PACM detects battery voltage above 16 volts on the power supply circuit for 50 milliseconds or longer.

Possible Sources

  • Charging System Concern
  • PAKM
NOTE: DTC U3003:17 may remain stored in the module due to previous battery charging or vehicle jump-start events.
K1 CHECK THE CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
  • The ignition is on.
  • Using the diagnostic scan tool, perform a self-test of all modules.
  • Retrieve continuous memory DTCs from all modules.

Are any high voltage Diagnostic Trouble Codes (DTCs) set in more than one module?
Yes CHECK the charging system condition. REFER to the appropriate section 414-00.
No GO to K2
K2 CHECK THE BATTERY VOLTAGE
  • Turn off all interior/exterior lamps and accessories.
  • Start the engine and run at approximately 2000 rpm for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to 15.5 volts or higher?
Yes CHECK the charging system condition. REFER to the appropriate section 414-00.
No GO to K3
K3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17
  • Ignition OFF.
  • The ignition is on.
  • Using the diagnostic scan tool, clear the DTCs from continuous memory.
  • Perform an IPC self-test.

Is DTC U3003:17 present?
Yes INSTALL a new PACM.
Refer to: Pedestrian Alert Control Module (PACM) (Pedestrian Alert System 413-22, Removal and Installation).
No The system is currently operating correctly. The DTC may have been set earlier during battery charging or a vehicle jump-start.

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