Powertrain
External Controls. Diagnosis and Testing
In this manual: Powertrain
4steps
~24min
2/5difficulty
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Inspection and Verification
- Verify the customer concern.
- Visually check for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually apparent, verify the symptom and refer to the Symptom Chart.
Visual Inspection Chart
| mechanical | Electrical |
| Shift Cable | BJB Fuse 23 (15A) |
| GSM Rotary Knob and L Button | BJB Fuse 83 (20A) |
| Transmission Control Switch | BCM Fuse 12 (7.5A) |
| Wiring Harness | |
| Connectors | |
| Terminals |
PCM DTC Chart
PCM
| Trouble Code | Description | Action |
| P073D | Unable to Engage Neutral | Shift-by-wire system commanded Neutral. After some time, the TR sensor is valid but does not indicate Neutral. The gear shift indicator light is on and a message center message displays a shift system fault. The engine cranks if stuck in Reverse or in Drive, and does not start if stuck in Park. Forward or reverse gear is not available if stuck in Park, or the vehicle cannot be driven. The ePRNDL remains on and may drain the battery if the system is stuck in a non-Park position. CHECK for low voltage in the TRCM system or TRCM DTCs. CHECK the shift cable for kinks, pinching, or incorrect routing. REFER TO: Shift Cable — 1.5 L EcoBoost (118 kW/160 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Cable — 2 L EcoBoost (184 kW/250 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Cable — 2.5 L Duratec (125 kW/170 L hp) (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). PERFORM the network test. If DTCs are present, perform the diagnostic procedure for those DTCs. |
| P073E | Unable to Engage Reverse | The shift-by-wire system commanded Reverse. After a while, the TR sensor is valid but does not show Reverse. The wrench light is on, and the message center displays a shift system fault message. The engine does not start if the vehicle is stuck in gear. No reverse engagement. ePRNDL remains on and may discharge the battery if the system is stuck in a non-Park position. CHECK for low voltage in the TRCM system or TRCM DTCs. CHECK the shift cable for pinching, binding, or incorrect routing. REFER TO: Shift Lever Cable — 1.5 L EcoBoost (118 kW/160 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2 L EcoBoost (184 kW/250 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2.5 L Duratec (125 kW/170 L hp) (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). PERFORM the network test. If DTCs are present, perform the diagnostic procedure for those DTCs. |
| P07E4 | Unable to Engage Park | The shift-by-wire system commanded Park. After a while, the TR sensor is valid but does not show Park. The wrench light is on, and the message center displays a shift system fault message. If the transmission is stuck in Drive or Reverse, the engine does not start, and the EPB applies when Park is selected without an operator EPB request. (Park Default may also be activated.) CHECK for low voltage in the TRCM system or TRCM DTCs. CHECK the shift lever cable for pinching, binding, or incorrect routing. REFER TO: Shift Lever Cable — 1.5 L EcoBoost (118 kW/160 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2 L EcoBoost (184 kW/250 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2.5 L Duratec (125 kW/170 L hp) (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). PERFORM the network test. If DTCs are present, perform the diagnostic procedure for those DTCs. |
| P07E5 | Unable to Engage Drive | The shift-by-wire system commanded Drive. After a while, the TR sensor is valid but does not indicate Drive. The wrench light is on, and the message center displays a shift system fault message. The engine may not run. No drive engagement. CHECK for low voltage in the TRCM system or TRCM DTCs. CHECK the shift cable for pinching, binding, or incorrect routing. REFER TO: Shift Lever Cable — 1.5 L EcoBoost (118 kW/160 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2 L EcoBoost (184 kW/250 L hp) — I4 (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). REFER TO: Shift Lever Cable — 2.5 L Duratec (125 kW/170 L hp) (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). PERFORM the network test. If DTCs are present (DTCs), perform the diagnostic procedure for those DTCs. |
| P085D | Transmission Control Module "A" Performance | This DTC by itself indicates a problem with the redundant communication wire between the GSM and the PCM. If other DTCs are present, address those DTCs first. CLEAR the DTC. Perform the network test. If DTC P085D returns, GO to Pinpoint Test G. |
| P0861 | Shift Control Module Communication Circuit "A" Low Signal | This DTC by itself indicates a problem with the redundant communication wire between the GSM and the PCM. If other DTCs are present, address those DTCs first. CLEAR the DTC. Perform the network test. If DTC P0861 returns, GO to Pinpoint Test G. |
| P0862 | Shift Control Module Communication Circuit "A" High Signal | This DTC by itself indicates a problem with the redundant communication wire between the GSM and the PCM. If other DTCs are present, address those DTCs first. CLEAR the DTC. Perform the network test. If DTC P0862 returns, GO to Pinpoint Test G. |
| P164E | Internal Control Module Transmission Range Performance | CLEAR the DTC. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. REFER TO: Gear Shift Module (GSM) (307-05A External Controls, Automatic Transmission — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P175B | TRCM Shift Cable Disconnected/Not Adjusted | If this DTC is present, refer to this DTC first. This DTC indicates that the reported TR sensor position differs from the position reported by the TRCM. The wrench indicator illuminates and a shift system fault is displayed. Refer to: Shift Lever Cable Adjustment - 1.5 L EcoBoost (118 kW/160 L PS) - I4 (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures). Refer to: Shift Lever Cable Adjustment - 2 L EcoBoost (184 kW/250 L PS) - MI4 (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures). Refer to: Shift Lever Cable Adjustment - 2.5 L Duratec (125 kW/170 L PS) (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures). |
| P177F | Unable to fully engage neutral | May be set by P0752, P0757, P0762 and/or P0767. CLEAR the DTCs. If the DTC returns, Refer to: Symptom Chart Diagnostics (307-01B Automatic Transmission - 6-Speed Automatic Transmission - 6F50/6F55, Diagnosis and Testing). |
| P1780 | Transmission Control Switch (Overdrive Cancel) Circuit Out of Self-Test Range | GO TO Pinpoint Test T |
| U0103 | Lost Communication with Shift Control Module A | CLEAR the DTCs. PERFORM the GWM network test. If GWM DTCs return, Refer to: Communication Network (418-00 Communication Network, Diagnosis and Testing). Otherwise, if DTC U0103 returns, GO to Pinpoint Test I. |
| U019E | Lost Communication With Transmission Range Module | If DTCs P07F5, U101E and/or U101F are present, diagnose these DTCs first. If DTC U019E is the only DTC present, GO to Pinpoint Test N. |
| U0404 | Invalid Data Received from Shift Control Module "A" | This DTC indicates that the PCM can receive GSM CAN messages, but the GSM indicates a fault with one or more data signals that the PCM uses for operation. Using a scan tool, retrieve the GSM DTCs. REFER to the GSM DTC chart and follow the GSM repair procedures. |
| U049F | Invalid Data Received from Transmission Range Control Module | This DTC indicates that the PCM can receive TRCM CAN messages, but the TRCM indicates a fault with one or more data signals that the PCM uses for operation. Using a scan tool, retrieve the TRCM DTCs. REFER to the TRCM DTC chart and follow the TRCM repair procedures. |
| U101E | Invalid internal control module monitor data received from the Gear Select Module | CLEAR the DTCs. PERFORM the GWM network test. If GWM DTCs return, Refer to: Communication Network (418-00 Communication Network, Diagnosis and Testing). If PCM DTCs return, refer to: Engine Control Modules (303-14B Electronic Engine Controls - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing). Refer to: Engine Control Modules (303-14C Electronic Engine Controls - 2.5 L Duratec (125 kW/170 L PS), Diagnosis and Testing). If DTC U101E returns, REPROGRAM the original GSM. Refer to: Module Programming (418-01 Module Configuration, General Procedures). |
| U101F | Invalid internal control module monitor data received from the Transmission Range Control Module | CLEAR the DTCs. PERFORM the GWM network test. If GWM DTCs return, Refer to: Communication Network (418-00 Communication Network, Diagnosis and Testing). If PCM DTCs return, refer to: Engine Control Modules (303-14B Electronic Engine Controls - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing). Refer to: Engine Control Modules (303-14C Electronic Engine Controls - 2.5 L Duratec (125 kW/170 L PS), Diagnosis and Testing). If DTC U101F returns, REPROGRAM the original TRCM. Refer to: Module Programming (418-01 Module Configuration, General Procedures). |
GSM DTC Chart
| Trouble Code | Description | Action |
| P0562 | Low system voltage | GO to Pinpoint Test Q |
| P0563 | System Voltage High | GO TO Pinpoint Test R |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | If other DTCs are present, diagnose these DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. Refer to: Shift Control Module (GSM) (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P0606 | Control Module Processor | If other DTCs are present, diagnose these DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. Refer to: Shift Control Module (GSM) (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P0607 | Control Module Performance | If other DTCs are present, diagnose these DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. Refer to: Shift Control Module (GSM) (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P06B8 | Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error | If other DTCs are present, diagnose these DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. Refer to: Shift Control Module (GSM) (307-05A External Controls, Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P07EC | Transmission Range Multi-Function Circuit | GO to Pinpoint Test S |
| P07ED | Transmission Range Multi-Function Circuit Stuck | GO to Pinpoint Test S |
| P07F2 | Transmission Range Control Module Communication Circuit | This DTC by itself indicates a problem with the redundant communication wire between the GSM and TRCM. If other DTCs are present, diagnose these DTCs first. CLEAR the DTC. Perform the network test. If DTC P07F2 returns, GO to Pinpoint Test B. |
| P07F3 | Transmission Range Control Module Communication Circuit Low Signal | This DTC by itself indicates a problem with the redundant communication wire between the GSM and TRCM. If other DTCs are present, diagnose these DTCs first. GO to Pinpoint Test B. |
| P07F4 | Transmission Range Control Module Communication Circuit High Signal | This DTC by itself indicates a problem with the redundant communication wire between the GSM and TRCM. If other DTCs are present, diagnose these DTCs first. GO to Pinpoint Test B. |
| P0814 | Transmission Range Indicator Circuit | If other DTCs are present, diagnose these DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, GO to Pinpoint Test O. |
| P081F | Brake Transmission Shift Interlock Correlation (BTSI) | If other DTCs are present, diagnose these DTCs first. CLEAR the DTC. Perform the network test. If DTC P081F returns, GO to Pinpoint Test C. |
| P0915 | Shift Position Sensor "A" Circuit Range/Performance | If other DTCs are present, address those DTCs first. CLEAR the DTCs. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, GO to Pinpoint Test O. |
| P0919 | Shift Position Control Fault | If other DTCs are present, address those DTCs first. CLEAR the DTC. Perform the network test. If the DTC returns, GO to Pinpoint Test P. |
| P0929 | Shift Interlock Solenoid/Actuator "A" Circuit Range/Performance | If DTC P0929 is in History, it may have been set by something restricting or holding the rotary knob in place during RETURN TO PARK. If DTC P0929 is set to Continuous, continue diagnosis. If other DTCs are present, address those DTCs first. CLEAR the DTC. PERFORM the GSM self-test. If the DTC returns, GO to Pinpoint Test P. |
| P164E | Internal Control Module Transmission Range Performance | Transmission may not shift out of Park with the P button flashing. EPB applies without operator request. CLEAR the DTC. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM module. REFER TO: Gear Shift Module (GSM) (307-05A External Controls - Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P166B | Driver Door Status Correlation | Open, then close the driver door and cycle the ignition. The door locks. If the open door indicator is illuminated on the IPC or the door locks do not operate properly, REFER TO: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing). If the door is ajar and the locks operate correctly, GO to Pinpoint Test D. |
| P1753 | Gear Shift Position Sensor Alignment | If DTC P1753 is in History, the customer may have set this DTC by holding the rotary knob between gears for 30 seconds . If DTC P1753 is set to Continuous, continue diagnosis. Diagnostic trouble code P1753 is triggered when the shift knob is held in an intermediate position for an extended period. CLEAR the DTC. PERFORM the GSM self-test. If the DTC returns, GO to Pinpoint Test P. |
| U0100 | Lost Communication With ECM/PCM "A" | If other DTCs are present, address those DTCs first. CLEAR the DTC. PERFORM the GWM network test. If DTCs return, GO to Pinpoint Test H. |
| U0121 | Lost Communication with Anti-Lock Braking System (ABS) Module | If other DTCs are present, address those DTCs first. If DTC U0121 is present in other modules, address the other reporting modules first. CLEAR the DTC. PERFORM the GWM network test. If DTCs return, GO to Pinpoint Test J. |
| U0140 | Lost Communication With Body Control Module | If other DTCs are present, address those DTCs first. If DTC U0140 is present in other modules, address the other reporting modules first. CLEAR the DTC. PERFORM the GWM network test. If DTCs return, GO to Pinpoint Test K. |
| U0151 | Lost Communication with Restraints Control Module | If other DTCs are present, address those DTCs first. If DTC U0151 is present in other modules, address the other reporting modules first. CLEAR the DTC. PERFORM the GWM network test. If DTCs return, GO to Pinpoint Test L. |
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Module | If other DTCs are present, address those DTCs first. If DTC U0155 is present in other modules, address the other reporting modules first. CLEAR the DTC. PERFORM the GWM network test. If DTCs return, GO to Pinpoint Test M. |
| U019E | Lost Communication With Transmission Range Module | If other DTCs are present, address those DTCs first. If DTC U019E is present in other modules, address the other reporting modules first. If DTCs P07F5, U101E and/or U101F are present, diagnose those DTCs first. PERFORM the Network Test. If DTC U019E is the only DTC present, GO to Pinpoint Test N. |
| U0301 | Software Incompatibility With Engine/Powertrain Control Module | The transmission cannot exit park. CLEAR the DTCs. REPROGRAM the original PCM with the latest PCM software. PERFORM the PCM self-test. If the DTC returns,  Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint Test. If a new PCM is installed, PERFORM the transmission strategy download, REFER TO: Transmission Strategy Download (307-01B Automatic Transmission - 6-Speed Automatic Transmission - 6F50/6F55, General Procedures). |
| U0401 | Invalid data received from ECM/PCM "A" | This DTC indicates that the PCM is sending an error message for one or more data signals that the GSM uses for operation. Using a diagnostic scanner, CLEAR all DTCs. PERFORM the PCM self-test. If PCM DTCs are present, REFER TO: Engine Control Modules (303-14B Electronic Engine Controls - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing). REFER TO: Engine Control Modules (303-14C Electronic Engine Controls - 2.5 L Duratec (125 kW/170 L PS), Diagnosis and Testing). and follow the PCM repair procedures. |
| U0415 | Invalid data received from Anti-Lock Brake System (ABS) Module | This DTC indicates that the ABS module is sending a fault message for vehicle speed determination. Using a diagnostic scanner, retrieve the ABS DTCs. REFER TO: Anti-Lock Braking System (ABS) and Stability Control System (206-09 Anti-Lock Braking System (ABS) and Stability Control System, Diagnosis and Testing). and follow the ABS repair procedures. |
| U0422 | Invalid data received from Body Control Module | This DTC indicates that the BCM is transmitting a fault status for one or more signals that the GSM uses for operation. Using a scan tool, CLEAR all DTCs. PERFORM the BCM self-test. If BCM fault codes are present, REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). and follow the BCM repair procedures. |
| U0452 | Invalid data received from Restraints Control Module | This fault code indicates that the RCM is sending a driver seat belt fault message. Using a scan tool, CLEAR all DTCs. PERFORM the RCM self-test. If RCM fault codes are present, REFER to: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). and follow the RCM repair procedures. |
| U049F | Invalid Data Received from Transmission Range Control Module | This DTC indicates that the GSM may be receiving TRCM CAN messages, but the TRCM is reporting a fault for one or more data signals that the GSM uses for operation. Using a scan tool, retrieve the TRCM fault codes. REFER to the TRCM DTCs and follow the TRCM repair procedures. |
| U1011 | Invalid internal control module monitor data received from the ECM/PCM | This DTC indicates that the GSM can receive PCM CAN messages, but the PCM indicates a fault in one or more data signals that the GSM uses for operation. Using a diagnostic scanner, retrieve the PCM trouble codes. If PCM trouble codes are present, REFER TO: Engine Control Modules (303-14B Engine Control Modules — 2 L EcoBoost (184 kW/250 L hp) — I4, Diagnosis and Testing). REFER TO: Engine Control Modules (303-14C Engine Control Modules — 2.5 L Duratec (125 kW/170 L hp), Diagnosis and Testing). and follow the PCM repair procedures. |
| U101F | Invalid internal control module monitor data received from the Transmission Range Control Module | This DTC indicates that the PCM may be receiving TRCM CAN messages, but the TRCM is reporting a fault for one or more data signals that the GSM uses for operation. Using a scan tool, retrieve the TRCM fault codes. REFER to the TRCM DTCs and follow the TRCM repair procedures. |
DTC Chart - TRCM
TRCM
| Trouble Code | Description | Action |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | If other DTCs are present, diagnose those DTCs first. CLEAR the fault code. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER to: Transmission Range Control Module (TRCM) (307-05A External Transmission Controls — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P0606 | Control Module Processor | If other DTCs are present, diagnose those DTCs first. CLEAR the fault code. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER to: Transmission Range Control Module (TRCM) (307-05A External Transmission Controls — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P0607 | Control Module Performance | If other DTCs are present, diagnose those DTCs first. CLEAR the fault code. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER to: Transmission Range Control Module (TRCM) (307-05A External Transmission Controls — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P06B8 | Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error | If other DTCs are present, diagnose those DTCs first. CLEAR the fault code. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER to: Transmission Range Control Module (TRCM) (307-05A External Transmission Controls — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P07F5 | Transmission Range Control Module System Low Voltage | If other DTCs are present, diagnose those DTCs first. If DTC P07F5 is set together with DTC P0562 and/or P1397, REFER to: Charging System (414-00 Charging System — General Information, Diagnosis and Testing). CLEAR the fault code. PERFORM the TRCM self-test. If DTC P07F5 is the only DTC present, GO to Pinpoint Test E. |
| P0860 | Gear Shift Control Module "A" Communication Circuit | If other DTCs are present, diagnose those DTCs first. When this fault code is set, the wrench indicator illuminates and the message center displays a shift system fault message. The EPB applies without driver request. CLEAR the fault code. PERFORM the TRCM self-test. If DTC P0860 returns, GO to Pinpoint Test G. |
| P0861 | Shift Control Module Communication Circuit "A" Low Signal | If other DTCs are present, diagnose those DTCs first. When this fault code is set, the wrench indicator illuminates and the message center displays a shift system fault message. The EPB applies without driver request. CLEAR the fault code. PERFORM the TRCM self-test. If DTC P0861 returns, GO to Pinpoint Test G. |
| P0862 | Shift Control Module Communication Circuit "A" High Signal | If other DTCs are present, diagnose those DTCs first. When this fault code is set, the wrench indicator illuminates and the message center displays a shift system fault message. The EPB applies without driver request. CLEAR the fault code. PERFORM the TRCM self-test. If DTC P0862 returns, GO to Pinpoint Test G. |
| P0A3F | Drive Motor Position Sensor "A" Circuit | If other DTCs are present, diagnose those DTCs first. This fault code indicates a fault in one or both of the rotary position sensors. The transmission may become stuck in Park if both sensors fail. CLEAR the fault code. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER to: Transmission Range Control Module (TRCM) (307-05A External Transmission Controls — 6-Speed Automatic Transmission — 6F35, Removal and Installation). |
| P177A | Transmission Range Select Motor | If DTC P177B is present, diagnose this DTC first. If other DTCs are present, service those DTCs first. This DTC indicates that the TRCM did not reach or did not hold the position commanded by the PCM. CHECK the shift selector cable gasket and adjustment. REFER TO: Shift Selector Cable Adjustment - 1.5 L EcoBoost (118 kW/160 L PS) - I4 (307-05A External Automatic Transmission Controls - 6-Speed Automatic Transmission - 6F35, General Procedures). REFER TO: Shift Selector Cable Adjustment - 2 L EcoBoost (184 kW/250 L PS) - MI4 (307-05A External Automatic Transmission Controls - 6-Speed Automatic Transmission - 6F35, General Procedures). REFER TO: Shift Selector Cable Adjustment - 2.5 L Duratec (125 kW/170 L PS) (307-05A External Automatic Transmission Controls - 6-Speed Automatic Transmission - 6F35, General Procedures). If the cable is adjusted correctly, apply the parking brake and disconnect the shift selector cable from the manual control lever. Manually move the manual control lever from Park to Drive and back to Park. If there is little or no resistance, CHECK the manual valve detent spring. If the manual lever has excessive resistance or binds, further investigation is necessary. The concern may be in the park mechanism, manual valve, and/or TR sensor. Connect the shift selector cable and perform the cable adjustment procedure. REFER TO: Symptom Diagnosis (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing). |
| P177B | Transmission Range Select Motor Current Too High | If other DTCs are present, service those DTCs first, except DTC P177A. This DTC indicates that the TRCM did not reach or did not hold the position commanded by the PCM. GO TO Pinpoint Test F. |
| P177C | Motor Default Position | This fault code may be set due to low battery voltage. PERFORM the TRCM self-test. If TRCM DTC P07F5 is present, GO TO Pinpoint Test E. DTC P177C indicates a default park mechanism failure. Default Park is disabled or the transmission is stuck in Park. DTC P177D, P177E and/or P0A3F may be set. REPEAT the TRCM self-test. If DTC P177C returns, INSTALL a new TRCM. REFER TO: Transmission Range Control Module (TRCM) (307-05A External Automatic Transmission Controls - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P177D | Motor Current Too High in Default Position | This fault code indicates that the default park motor current value is too high. Default Park is disabled or the transmission is stuck in Park. Allow the system to cool. CLEAR the fault code. PERFORM the TRCM self-test. If the fault code returns, GO TO Pinpoint Test F. |
| P177E | Default Position Range Sensor/Switch Performance | This fault code indicates a failure of one or both default mechanism sensors. The transmission is stuck in Park. CLEAR the fault code. PERFORM the TRCM self-test. If the fault code returns, INSTALL a new TRCM. REFER TO: Transmission Range Control Module (TRCM) (307-05A External Automatic Transmission Controls - 6-Speed Automatic Transmission - 6F35, Removal and Installation). |
| P2533 | Ignition Switch Run/Start Circuit | This DTC indicates that the backup ignition "Run/Start" circuit is intermittent. CHECK the GSM and BCM connectors for damage or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). |
| P2534 | Ignition Switch Run/Start Circuit Low | This DTC indicates that the backup ignition "Run/Start" circuit is shorted to ground. CHECK the GSM and BCM connectors for damage or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). |
| P2535 | Ignition Switch RUN/START Circuit - High Signal Level | This DTC indicates that the backup ignition "Run/Start" circuit is shorted to the power supply circuit. CHECK the GSM and BCM connectors for damage or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). |
| U0029 | Controller Area Network (CAN) Bus "A" Performance | If DTC P0607 is present together with U0029, service DTC P0607 first. If only DTC U0029 is present, CLEAR the DTC. PERFORM the Network Test. If the DTC returns, REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing). |
| U0073 | Control Module Communication Bus "A" Off | Park may only be available through the door or seat belt status changes. Stay-in-Neutral mode may be disabled. Neutral tow may be impaired. Exit from neutral tow may be disabled. CHECK the connectors for damage, pushed-out terminals, corrosion, loose wires, and missing or damaged seals. CLEAR the fault code. PERFORM the Network Test. If the fault code returns, REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing). |
| U0100 | Lost Communication With ECM/PCM "A" | CLEAR the fault code. PERFORM the GWM Network Test. If the fault code returns, GO TO Pinpoint Test H. |
| U0103 | Lost Communication With Shift Control Module "A" | If DTCs P085D, P0860 and/or P0861 are present, diagnose those DTCs first. PERFORM the Network Test. If DTC U0103 is the only DTC present, GO TO Pinpoint Test I. |
| U0121 | Lost Communication with Anti-Lock Braking System (ABS) Module | CLEAR the fault code. PERFORM the GWM Network Test. If the fault code returns, GO TO Pinpoint Test J. |
| U0140 | Lost Communication With Body Control Module | CLEAR the fault code. PERFORM the GWM Network Test. If the fault code returns, GO TO Pinpoint Test K. |
| U0155 | Lost Communication with Instrument Panel Cluster (IPC) Module | CLEAR the DTC. PERFORM the GWM network test. If the DTC returns, GO to Pinpoint Test M. |
| U0301 | Software Incompatibility With Engine/Powertrain Control Module | CLEAR the DTC. REPROGRAM the original PCM using the latest PCM software. PERFORM the PCM self-test. If the DTC returns,  Click here to access the guided routine (PCM). Internet Explorer version 11 or later is required to perform this Pinpoint Test. If a new PCM is installed, PERFORM the transmission strategy download, REFER TO: Transmission Strategy Download (307-01B Automatic Transmission - 6-Speed Automatic Transmission - 6F50/6F55, General Procedures). |
| U0401 | Invalid data received from ECM/PCM "A" | This DTC indicates that the PCM is sending a fault message for one or more data signals that the TRCM uses for operation. Using a diagnostic scan tool, CLEAR all DTCs. PERFORM the PCM self-test. If PCM DTCs are present, REFER to: Engine Control Modules (303-14B Engine Control Modules - 2 L EcoBoost (184 kW/250 L PS) - MI4, Diagnosis and Testing). REFER to: Engine Control Modules (303-14C Engine Control Modules - 2.5 L Duratec (125 kW/170 L PS), Diagnosis and Testing). and follow the PCM repair procedures. |
| U0404 | Invalid Data Received from Shift Control Module "A" | This DTC indicates that the PCM can receive GSM CAN messages, but the GSM indicates a fault in one or more data signals that the TRCM uses for operation. Using a diagnostic scan tool, retrieve the GSM DTCs. REFER to the GSM chart and follow the GSM repair procedures. |
| U0415 | Invalid data received from Anti-Lock Brake System (ABS) Module | This DTC indicates that the ABS module is sending a fault message for vehicle speed determination. Using a diagnostic scanner, retrieve the ABS DTCs. REFER TO: Anti-Lock Braking System (ABS) and Stability Control System (206-09 Anti-Lock Braking System (ABS) and Stability Control System, Diagnosis and Testing). and follow the ABS repair procedures. |
| U0422 | Invalid data received from Body Control Module | This DTC indicates that the BCM is transmitting a fault condition for one or more signals that the TRCM uses for operation. Using a diagnostic scan tool, CLEAR all DTCs. PERFORM the BCM self-test. If BCM DTCs are present, REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). and follow the BCM repair procedures. |
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).
In most cases, the PCM sets a DTC to assist with diagnosis. See DTC before using the Symptom Chart. The Symptom column lists the vehicle condition. The Possible Sources column lists the specific vehicle condition details. The Action column lists the actions to perform to determine the cause of the condition. Each action lists the components that may cause the symptom and the individual components in this system.
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Pinpoint Tests
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PINPOINT TEST A: BRAKE TRANSMISSION SHIFT INTERLOCK SYSTEM DOES NOT RELEASE PROPERLY For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe BCM supplies battery power to the GSM. The brake shift interlock override switch receives power from the GSM. When the brake shift interlock override switch is held, the GSM flashes, indicating that the vehicle is in neutral for towing. Possible Sources
|
|||||||||||||
| A1 CHECK THE BRAKE SHIFT INTERLOCK SWITCH | |||||||||||||
Do SBW_OVR_SW_1 and SBW_OVR_SW_2 change status from Pressed to Released?
|
|||||||||||||
| A2 CHECK THE BRAKE SHIFT INTERLOCK CIRCUITS | |||||||||||||
Is the voltage greater than 5 volts?
|
|||||||||||||
| A3 CHECK THE BRAKE SHIFT INTERLOCK OVERRIDE DRIVER CIRCUIT FOR AN OPEN | |||||||||||||
Is the voltage greater than 5 volts?
|
|||||||||||||
| A4 CHECK THE BRAKE SHIFT INTERLOCK SWITCH | |||||||||||||
Is the resistance less than 3 ohms with the switch pressed and greater than 10,000 ohms with the switch released?
|
|||||||||||||
| A5 VERIFY GSM OPERATION | |||||||||||||
Is the concern still present?
|
PINPOINT TEST B: DTCS P07F2, P07F3, P07F4 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM and TRCM communicate over HS-CAN but use the PWM hardwired system as a backup. If the HS-CAN system fails, the GSM and TRCM communicate over this hardwired system. DTC Fault Trigger Conditions
Possible Sources
|
||||||||||||
| B1 RETRIEVE AND RECORD ALL DTCS | ||||||||||||
Are DTCs P0562, P0563, or P07F5 present?
|
||||||||||||
| B2 CHECK THE PWM (PULSE WIDTH MODULATION) 3 CIRCUIT FOR AN OPEN | ||||||||||||
Is the resistance less than 3 ohms?
|
||||||||||||
| B3 CHECK THE PWM (PULSE WIDTH MODULATION) 3 CIRCUIT FOR A SHORT TO GROUND | ||||||||||||
Is the resistance greater than 10000 Ohms?
|
||||||||||||
| B4 CHECK THE PWM (PULSE WIDTH MODULATION) 3 CIRCUIT FOR A SHORT TO POWER | ||||||||||||
Is there voltage present?
|
PINPOINT TEST C: DTC P081F For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM and BCM communicate over HS-CAN but use the hardwired system as a backup. If the HS-CAN system fails, the GSM and BCM communicate over this hardwired system. DTC Fault Trigger Conditions
Possible Sources
|
||||||||||
| C1 CHECK THE BRAKE LIGHT CIRCUIT OPERATION | ||||||||||
Do the brake lights come on when the pedal is depressed but do not come on when the pedal is released?
|
||||||||||
| C2 CHECK THE BTSI CIRCUIT VOLTAGE | ||||||||||
Is the measured voltage greater than 11 volts with the brake pedal depressed and 0 volts with the brake pedal released?
|
||||||||||
| C3 CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK CIRCUIT FOR AN OPEN | ||||||||||
Is the resistance less than 3 ohms?
|
||||||||||
| C4 CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK CIRCUIT FOR A SHORT TO GROUND | ||||||||||
Is the resistance greater than 10000 Ohms?
|
||||||||||
| C5 CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK CIRCUIT FOR A SHORT TO POWER | ||||||||||
Is there voltage present?
|
||||||||||
| C6 CHECK FOR GSM MALFUNCTION | ||||||||||
Is the condition still present?
|
Click here to access the guided procedure (BCM).
Internet Explorer version 11 or later is required to perform this Pinpoint test. 
PINPOINT TEST D: DTC P166B Refer to Wiring Diagrams Cell 37 for schematic and connector information. Refer to Wiring Diagrams Cell 117 for schematic and connector information. Normal Operation and Fault SymptomsThe GSM uses the driver door unlock switch input and the driver door status input as it checks, before forcing the transmission into Park, when the operator is preparing to leave the vehicle. DTC Fault Trigger Conditions
Possible Sources
|
|||||||||||||
| D1 RUN THE GSM SELF-TEST, RETRIEVE AND RECORD ALL DTCS | |||||||||||||
Is DTC P166B present?
|
|||||||||||||
| D2 MONITOR THE DOOR UNLOCK/LOCK | |||||||||||||
Does the PID change when the driver door is locked and unlocked?
|
|||||||||||||
| D3 CHECK THE DOOR UNLOCK CIRCUIT FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
|
|||||||||||||
| D4 CHECK THE DOOR UNLOCK CIRCUIT FOR A SHORT TO GROUND | |||||||||||||
Is the resistance greater than 10000 Ohms?
|
|||||||||||||
| D5 CHECK THE DOOR STATUS CIRCUIT FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
|
|||||||||||||
| D6 CHECK THE DOOR STATUS CIRCUIT FOR A SHORT TO GROUND | |||||||||||||
Is the resistance greater than 10000 Ohms?
|
|||||||||||||
| D7 CHECK THE DOOR UNLOCK CIRCUIT AND THE DOOR STATUS CIRCUIT FOR A SHORT TO POWER | |||||||||||||
Is there voltage present?
|
|||||||||||||
| D8 CHECK FOR GSM MALFUNCTION | |||||||||||||
Is the condition still present?
|
PINPOINT TEST E: DTC P07F5 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe TRCM receives two voltage inputs from the BJB. The fuse 23 (15A) hot in run and start circuit supplies power to the TRCM microprocessor. The fuse 83 (20A) constant hot circuit supplies power to the transmission control module motors, which are used to move the shift lever cable and the manual valve inside the main control valve body. DTC Fault Trigger Conditions
Possible Sources
|
|||||||||||||
| E1 RETRIEVE AND RECORD ALL DTCS | |||||||||||||
Is DTC P07F5 present?
|
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| E2 CHECK THE TRCM (TRANSMISSION RANGE MODULE) POWER CIRCUITS FOR AN OPEN | |||||||||||||
Is the voltage greater than 11 volts?
|
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| E3 CHECK THE BJB (BATTERY JUNCTION BOX) FUSE 83 (20A) | |||||||||||||
Is the resistance less than 3 ohms?
|
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| E4 CHECK THE BJB (BATTERY JUNCTION BOX) FUSE 23 (15A) | |||||||||||||
Is the resistance less than 3 ohms?
|
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| E5 CHECK THE TRCM (TRANSMISSION RANGE MODULE) POWER CIRCUITS FOR A SHORT TO GROUND | |||||||||||||
Is the resistance greater than 10000 Ohms?
|
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| E6 CHECK THE TRCM (TRANSMISSION RANGE MODULE) POWER CIRCUITS FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
|
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| E7 CHECK THE TRCM (TRANSMISSION RANGE MODULE) GROUND CIRCUITS FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
|
PINPOINT TEST F: DTCS P177B, P177D Normal Operation and Fault SymptomsThe TRCM receives two voltage inputs from the BJB. The fuse 23 (15A) hot in run and start circuit supplies power to the TRCM microprocessor. The fuse 83 (20A) constant hot circuit supplies power to the transmission control module motors, which are used to move the shift lever cable and the manual valve inside the main control valve body. If the TRCM detects excessive motor current draw in the power supply circuit during a shift, this may indicate a mechanical malfunction. DTC Fault Trigger Conditions
Possible Sources
|
|||||||||
| F1 DTC RETRIEVAL AND RECORDING MODULE | |||||||||
Are DTCs P177B and/or P177D present?
|
|||||||||
| F2 CHECK THE MANUAL TRANSMISSION SHIFT LEVER | |||||||||
Does the manual transmission valve move freely through each range?
|
|||||||||
| F3 CHECK THE SHIFT SELECTOR CABLE | |||||||||
Does the shift selector cable slide freely?
|
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| F4 PERFORM TRCM (TRANSMISSION RANGE CONTROL MODULE) SELF-TEST | |||||||||
Are DTCs P177B and/or P117D present?
|
PINPOINT TEST G: DTCS P085D, P0860, P0861, P0862 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe TRCM, GSM and PCM communicate over the HS-CAN bus, but use a hard-wired PWM system as a backup. If the HS-CAN system fails, the TRCM, GSM and PCM communicate through this hard-wired system. The GSM sends a PWM signal to the PCM when the CAN system is not functioning, so the PCM knows which range the operator has selected. The PWM operates at 2 frequencies, 190 Hz and 230 Hz, and outputs 8 duty cycles. DTC Fault Trigger Conditions
Possible Sources
|
||||||||||||||||||||||
| G1 DTC STORED RECEIVING AND RECORDING MODULE | ||||||||||||||||||||||
Are DTCs P085D, P0860, P0861 and/or P0862 present?
|
||||||||||||||||||||||
| G2 CHECK THE PWM (PULSE WIDTH MODULATION) 1 CIRCUIT FOR A SHORT TO GROUND | ||||||||||||||||||||||
Is the resistance greater than 10000 Ohms?
|
||||||||||||||||||||||
| G3 CHECK THE PWM (PULSE WIDTH MODULATION) 1 CIRCUIT FOR AN OPEN | ||||||||||||||||||||||
Is the resistance less than 3 ohms?
|
||||||||||||||||||||||
| G4 CHECK THE PWM (PULSE WIDTH MODULATION) 1 CIRCUIT FOR A SHORT TO POWER | ||||||||||||||||||||||
Is there voltage present?
|
||||||||||||||||||||||
| G5 CHECK THE PWM (PULSE WIDTH MODULATION) 2 CIRCUIT FOR A SHORT TO GROUND | ||||||||||||||||||||||
Is the resistance greater than 10000 Ohms?
|
||||||||||||||||||||||
| G6 CHECK THE PWM (PULSE WIDTH MODULATION) 2 CIRCUIT FOR AN OPEN | ||||||||||||||||||||||
Is the resistance less than 3 ohms?
|
||||||||||||||||||||||
| G7 CHECK THE PWM (PULSE WIDTH MODULATION) 2 CIRCUIT FOR A SHORT TO POWER | ||||||||||||||||||||||
Is there voltage present?
|
PINPOINT TEST H: DTC U0100 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe GSM and TRCM use information contained in messages from the PCM sent over the HS-CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| H1 CHECK COMMUNICATION NETWORK | ||||||
Does the PCM pass the network test?
|
||||||
| H2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0100 present?
|
||||||
| H3 RETRIEVE THE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST | ||||||
Are any non-network GSM DTCs present?
|
||||||
| H4 CHECK THE TRCM (TRANSMISSION RANGE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Are DTCs U0100 present?
|
||||||
| H5 RETRIEVE THE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE TRCM (TRANSMISSION RANGE CONTROL MODULE) SELF-TEST | ||||||
Are any non-network TRCM DTCs present?
|
||||||
| H6 RETRIEVE THE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST | ||||||
Are DTCs P0562, P0563 and/or P1397 present?
|
||||||
| H7 CHECK DTC (DIAGNOSTIC TROUBLE CODE) U0100 SET IN OTHER MODULES | ||||||
Is DTC U0100 present in the ABS or IPC modules?
|
Click here to access the guided routine (PCM).
Internet Explorer version 11 or later is required to perform this Pinpoint Test. 
PINPOINT TEST I: DTC U0103 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe GSM and TRCM communicate over the High Speed 2 CAN bus. The PCM is connected to the High Speed 1 CAN bus. The GWM transfers this information from the HS2 CAN to the HS1 CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| I1 CHECK THE SCANNER COMMUNICATION WITH THE GEAR SHIFT MODULE | ||||||
Did the GSM pass the network test?
|
||||||
| I2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0103 present?
|
||||||
| I3 RETRIEVE THE STORED DTCS FROM THE PCM | ||||||
Are DTCs P0562, P0563 and/or P1397 present?
|
||||||
| I4 CHECK DTC U0103 SET IN OTHER MODULES | ||||||
Is DTC U0103 set in other network modules?
|
||||||
| I5 CHECK THE GSM OPERATION | ||||||
Is the concern still present?
|
||||||
| I6 CHECK THE PCM OPERATION | ||||||
Is the concern still present?
|
Click here to access the guided routine (PCM).
Internet Explorer version 11 or later is required to perform this Pinpoint Test. 
PINPOINT TEST J: DTC U0121 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe ABS, GSM and TRCM use information contained in messages on the HS-CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| J1 CHECK COMMUNICATION NETWORK | ||||||
Does the ABS module pass the network test?
|
||||||
| J2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0121 present?
|
||||||
| J3 RETRIEVE THE STORED DTCS FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST | ||||||
Are any non-network GSM DTCs present?
|
||||||
| J4 CHECK THE TRCM (TRANSMISSION RANGE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0121 present?
|
||||||
| J5 RETRIEVE THE STORED DTCS FROM THE TRCM (TRANSMISSION RANGE CONTROL MODULE) SELF-TEST | ||||||
Are any non-network TRCM DTCs present?
|
||||||
| J6 RETRIEVE THE STORED DTCS FROM THE ABS (ANTI-LOCK BRAKE SYSTEM) SELF-TEST | ||||||
Is DTC U3000:49 present?
|
||||||
| J7 CHECK DTC U0121 SET IN OTHER MODULES | ||||||
Is DTC U0121 present in the PCM or IPC?
|
Click here to access the Managed Routine (ABS).
Internet Explorer version 11 or later is required to perform this Pinpoint test. 
PINPOINT TEST K: DTC U0140 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe BCM, GSM and TRCM use information contained in messages on the HS-CAN bus. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| K1 CHECK COMMUNICATION NETWORK | ||||||
Does the BCM pass the network test?
|
||||||
| K2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0140 present?
|
||||||
| K3 RETRIEVE THE STORED DTCS FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST | ||||||
Are any non-network GSM DTCs present?
|
||||||
| K4 CHECK THE TRCM (TRANSMISSION RANGE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0140 present?
|
||||||
| K5 RETRIEVE THE STORED DTCS FROM THE TRCM (TRANSMISSION RANGE CONTROL MODULE) SELF-TEST | ||||||
Are any non-network TRCM DTCs present?
|
||||||
| K6 RETRIEVE THE STORED DTCS FROM THE BCM (BODY CONTROL MODULE) SELF-TEST | ||||||
Is DTC U3000:49 present?
|
||||||
| K7 CHECK DTC U0140 SET IN OTHER MODULES | ||||||
Is DTC U0140 present in the ABS or IPC modules?
|
Click here to access the guided procedure (BCM).
Internet Explorer version 11 or later is required to perform this Pinpoint test. 
PINPOINT TEST L: DTC U0151 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe RCM and GSM use information contained in messages on the HS-CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| L1 CHECK COMMUNICATION NETWORK | ||||||
Does the RCM pass the network test?
|
||||||
| L2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0151 present?
|
||||||
| L3 RETRIEVE THE STORED DTCS FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST | ||||||
Are any non-network GSM DTCs present?
|
||||||
| L4 RETRIEVE THE STORED DTCS FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST | ||||||
Is DTC U3000:49 present?
|
||||||
| L5 CHECK DTC U0151 SET IN OTHER MODULES | ||||||
Is DTC U0151 present in the ABS or IPC modules?
|
PINPOINT TEST M: DTC U0155 For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe IPC, GSM and TRCM use information contained in messages on the HS-CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| M1 CHECK COMMUNICATION NETWORK | ||||||
Does the IPC pass the network test?
|
||||||
| M2 CHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0155 present?
|
||||||
| M3 RETRIEVE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM GSM (GEAR SHIFT MODULE) SELF-TEST | ||||||
Are any non-network GSM DTCs present?
|
||||||
| M4 CHECK TRCM (TRANSMISSION RANGE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | ||||||
Is DTC U0155 present?
|
||||||
| M5 RETRIEVE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM TRCM (TRANSMISSION RANGE CONTROL MODULE) SELF-TEST | ||||||
Are any non-network TRCM DTCs present?
|
||||||
| M6 RETRIEVE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST | ||||||
Is DTC U3000:49 present?
|
||||||
| M7 CHECK DTC (DIAGNOSTIC TROUBLE CODE) U0155 KEY IN OTHER MODULES | ||||||
Is DTC U0155 present in the PCM or SCCM?
|
Click here to access the guided procedure (IPC).
Internet Explorer version 11 or later is required to perform this Pinpoint test. 
PINPOINT TEST N: DTC U019E For circuit and connector information, refer to Wiring Diagrams Cell 14. Normal Operation and Fault SymptomsThe GSM and TRCM communicate over the High Speed 2 CAN bus. The PCM is connected to the High Speed 1 CAN bus. The GWM transfers this information from the HS2 CAN to the HS1 CAN. DTC Fault Trigger Conditions
Possible Sources
|
||||||
| N1 CHECK SCAN TOOL COMMUNICATION WITH GSM (GEAR SHIFT MODULE) | ||||||
Does the TRCM pass the network test?
|
||||||
| N2 CHECK FOR DTC P07F5 IN TRCM | ||||||
Is DTC P07F5 stored?
|
||||||
| N3 CHECK GSM (GEAR SHIFT MODULE) CONTINUOUS MEMORY DTC (DIAGNOSTIC TROUBLE CODE) WITH | ||||||
Is DTC U019E retrieved again?
|
||||||
| N4 CHECK DTC (DIAGNOSTIC TROUBLE CODE) U019E SET IN OTHER MODULES | ||||||
Is DTC U019E set in other modules on the network?
|
||||||
| N5 CHECK GSM (GEAR SHIFT MODULE) OPERATION | ||||||
Is the concern still present?
|
||||||
| N6 CHECK TRCM (TRANSMISSION RANGE CONTROL MODULE) OPERATION | ||||||
Is the concern still present?
|
PINPOINT TEST O: DTCS P0814, P0915 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM sets DTC P0915 when its load attempt has failed. DTC Fault Trigger Conditions
Possible Sources
|
|||||||||||||
| O1 CHECK THAT THE BATTERY IS FULLY CHARGED | |||||||||||||
Is the battery fully charged?
|
|||||||||||||
| O2 CHECK GSM (GEAR SHIFT MODULE) CALIBRATION LEVEL | |||||||||||||
Is the GSM calibration at the latest level?
|
|||||||||||||
| O3 CHECK GSM (GEAR SHIFT MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (DTCS) | |||||||||||||
Is DTC P0814 or P0915 retrieved again?
|
|||||||||||||
| O4 CHECK GSM (GEAR SHIFT MODULE) POWER SUPPLY CIRCUIT FOR AN OPEN | |||||||||||||
Is the voltage within 1 volt of the recorded battery voltage?
|
|||||||||||||
| O5 CHECK GSM (GEAR SHIFT MODULE) GROUND CIRCUIT FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
|
|||||||||||||
| O6 CHECK GSM (GEAR SHIFT MODULE) OPERATION | |||||||||||||
Is the concern still present?
|
PINPOINT TEST P: DTCS P0919, P0929, P1753 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM automatically returns to P when the driver door is open and the driver seat belt is unbuckled. DTC Fault Trigger Conditions
Possible Sources
|
||||||||||||
| P1 CHECK GSM (GEAR SHIFT MODULE) ROTARY SHIFT KNOB | ||||||||||||
Was any debris or interference found?
|
||||||||||||
| P2 CHECK THAT THE BATTERY IS FULLY CHARGED | ||||||||||||
Is the battery fully charged?
|
||||||||||||
| P3 CHECK GSM (GEAR SHIFT MODULE) CONTINUOUS MEMORY DTC (DIAGNOSTIC TROUBLE CODE) WITH | ||||||||||||
Are any DTCs retrieved?
|
||||||||||||
| P4 CHECK GSM (GEAR SHIFT MODULE) AUTO-ROTATE FUNCTION | ||||||||||||
Does the rotary shift knob return to the PARK position?
|
||||||||||||
| P5 CHECK GSM (GEAR SHIFT MODULE) OPERATION | ||||||||||||
Is the concern still present?
|
PINPOINT TEST Q: DTC P0562 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM requires an operating voltage of 9 to 16 volts. Excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system causes the GSM module to set a trouble code. DTC Fault Trigger Conditions
Possible Sources
|
|||||||||||||
| Q1 RECHECK GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) | |||||||||||||
Is DTC P0562 still present?
|
|||||||||||||
| Q2 CHECK THE CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE) | |||||||||||||
Are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM?
|
|||||||||||||
| Q3 CHECK THE BATTERY CONDITION AND CHARGE STATE | |||||||||||||
Did the battery pass the condition check?
|
|||||||||||||
| Q4 CHECK THE GSM (GEAR SHIFT MODULE) VOLTAGE | |||||||||||||
Is the voltage within 1 volt of the recorded battery voltage?
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| Q5 CHECK THE GSM (GEAR SHIFT MODULE) GROUND CIRCUIT FOR AN OPEN | |||||||||||||
Is the resistance less than 3 ohms?
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| Q6 CHECK ALL ELECTRICAL CONNECTIONS | |||||||||||||
Are there no signs of corrosion, damaged terminals, bent terminals, pushed-out terminals or stretched terminals in the connectors?
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| Q7 CHECK THE GSM (GEAR SHIFT MODULE) FOR PROPER OPERATION | |||||||||||||
Is the concern still present?
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PINPOINT TEST R: DTC P0563 For circuit and connector information, refer to Cell 37 of the Wiring Diagrams. Normal Operation and Fault SymptomsThe GSM module requires an operating voltage of 9 to 16 volts. Excessive resistance or an open in one or more of these circuits, a discharged battery, or an inoperative charging system causes the GSM to set a DTC. An overcharge condition in the charging system causes the GSM to set a DTC. This DTC may also be set by charging the battery or starting the vehicle from an external power source. DTC Fault Trigger Conditions
Possible Sources
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| R1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES | ||||||
Are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM?
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| R2 CHECK THE BATTERY VOLTAGE | ||||||
Is the battery voltage between 13 and 15.2 volts?
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| R3 RECHECK THE GSM (GEAR SHIFT MODULE) FOR DTC P0563 | ||||||
Is DTC P0563 still present?
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| R4 CHECK ALL ELECTRICAL CONNECTIONS | ||||||
Are there no signs of corrosion, damaged terminals, bent terminals, pushed-out terminals or stretched terminals in the connectors?
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PINPOINT TEST S: DTCS P07EC, P07ED Normal Operation and Fault SymptomsThe GSM contains 3 switches under the center button. If the GSM does not recognize one switch, DTC P07EC is set. DTC Fault Trigger Conditions
Possible Sources
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| S1 RETRIEVE AND RECORD ALL DTCS | |||||||||
Are DTCs P07EC and/or P07ED present?
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| S2 CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK SWITCH FOR STICKING | |||||||||
Does the GSM_BTSI_OVRRD PID change from No to Yes?
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| S3 CHECK THE GSM CENTER BUTTON FOR STICKING | |||||||||
Do the SBW_SLM_SW_1, SBW_SLM_SW_2, SBW_SLM_SW_3 PIDs all change from No to Yes and back to No when the button is released?
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| S4 CHECK THE GSM (GEAR SHIFT MODULE) FOR PROPER OPERATION | |||||||||
Is the concern still present?
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PINPOINT TEST T: TRANSMISSION CONTROL SWITCH INOPERATIVE OR MALFUNCTIONING Refer to Wiring Diagrams Cell 30 for schematic and connector information. Normal Operation and Fault SymptomsThe transmission control switch is a momentary contact switch located on the center console. When the switch is pressed, the contacts close, sending a voltage signal to the PCM and notifying the module to disable overdrive. The PCM sends a message over MS-CAN to the IPC, which turns on the towing indicator in the IPC. DTC Fault Trigger Conditions
Possible Sources
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| T1 CHECK THE POWER SUPPLY TO THE GRADE ASSIST SWITCH | ||||||||||||||||||||||
Is the voltage 11 volts or higher?
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| T2 CHECK THE STABILITY CONTROL SWITCH POWER SUPPLY CIRCUIT FOR AN OPEN | ||||||||||||||||||||||
Is the resistance less than 3 ohms?
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| T3 CHECK THE GEAR SELECTOR LEVEL DISTRIBUTION SWITCH CIRCUIT FOR A SHORT TO GROUND | ||||||||||||||||||||||
Is the resistance greater than 10000 Ohms?
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| T4 CHECK THE GEAR SELECTOR LEVEL DISTRIBUTION SWITCH GROUND CIRCUIT | ||||||||||||||||||||||
Is the resistance less than 3 ohms?
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