Automatic Transaxle External Controls DTCS: TRCM

DTC INDEX

DTC	Description	Action
P0605	Internal Control Module Read Only Memory (ROM) Error	If other DTCs are present, address those DTCs first. CLEAR the DTC. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) .
P0606	Control Module Processor	If other DTCs are present, address those DTCs first. CLEAR the DTC. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) .
P0607	Control Module Performance	If other DTCs are present, address those DTCs first. CLEAR the DTC. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) .
P06B8	Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error	If other DTCs are present, address those DTCs first. CLEAR the DTC. REPROGRAM the original TRCM with the latest software. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) .
P07F5	Transmission Range Control Module System Voltage Low	If other DTCs are present, address those DTCs first. If DTC P07F5 is set along with DTC P0562 and/or P1397, Refer to: Charging System . CLEAR the DTC. PERFORM the TRCM self-test. If DTC P07F5 is the only DTC present, GO to Pinpoint Test C
P0860	Gear Shift Control Module "A" Communication Circuit	If other DTCs are present, address those DTCs first. When this DTC sets the wrench light illuminates and a Shift System Fault message is displayed in the message center. The EPB applies without the operator requesting EPB. CLEAR the DTC. PERFORM the TRCM self-test. If DTC P0860 returns, GO to Pinpoint Test H
P0861	Gear Shift Control Module "A" Communication Circuit Low	If other DTCs are present, address those DTCs first. When this DTC sets the wrench light illuminates and a Shift System Fault message is displayed in the message center. The EPB applies without the operator requesting EPB. CLEAR the DTC. PERFORM the TRCM self-test. If DTC P0861 returns, GO to Pinpoint Test H
P0862	Gear Shift Control Module "A" Communication Circuit High	If other DTCs are present, address those DTCs first. When this DTC sets the wrench light illuminates and a Shift System Fault message is displayed in the message center. The EPB applies without the operator requesting EPB. CLEAR the DTC. PERFORM the TRCM self-test. If DTC P0862 returns, GO to Pinpoint Test H
P0A3F	Drive Motor "A" Position Sensor Circuit	If other DTCs are present, address those DTCs first. This DTC indicates that one or both of the rotary position sensors have failed. The transmission may be stuck in Park if both sensors fail. CLEAR the DTC. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range (TR) Sensor (307-01 Automatic Transmission).
P177A	Transmission Range Select Motor	If DTC P177B is present, diagnose this DTC first. If other DTCs are present, address those DTCs first. This DTC indicates the TRCM did not achieve or hold the position commanded by the PCM. INSPECT the selector lever cable routing and adjustment. Refer to: Selector Lever Cable Adjustment - 6-Speed Automatic Transmission - 6F35 . Refer to: Selector Lever Cable Adjustment - 6-Speed Automatic Transmission - 6F50/6F55 . If the cable is adjusted correctly, apply the park brake and disconnect selector lever 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, INSPECT the manual valve detent spring. If the manual lever has excessive resistance or sticks then further investigation is required. The park system, manual valve and/or TR sensor assembly may have an issue. reattach shift cable and perform cable adjustment procedure. For Transmission Range (TR) Sensor Refer to:Automatic Transmission - 6F35 (Except Hybrid) or Automatic Transmission - 6F50/6F55 (Except Hybrid) .
P177B	Transmission Range Select Motor Current Too High	If other DTCs are present, address those DTCs first. Except DTC P177A. This DTC indicates the TRCM did not achieve or hold the position commanded by the PCM. GO to Pinpoint Test G
P177C	Default Position Motor	This DTC may set from a low battery condition. PERFORM the TRCM self-test. If TRCM DTC P07F5 is present, GO to Pinpoint Test F This DTC, P177C indicates the default to park mechanism has failed. Default to Park disabled or transmission is stuck in Park. May set DTC P177D, P177E and/or P0A3F. RERUN the TRCM self-test. If DTC P177C returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) .
P177D	Default Position Motor Current Too High	This DTC indicates the default to park motor current was too high. Default to Park disabled or transmission is stuck in Park. Allow the system to cool. CLEAR the DTC. PERFORM the TRCM self-test. If the DTC returns, GO to Pinpoint Test G
P177E	Default Position Sensor Range/Performance	This DTC indicates that one or both of the sensors on the default mechanism have failed. Transmission stuck in Park. CLEAR the DTC. PERFORM the TRCM self-test. If the DTC returns, INSTALL a new TRCM, Refer to: Transmission Range Control Module (TRCM) (307-05 Automatic Transmission External Controls, Removal and Installation).
P2533	Ignition Switch Run/Start Position Circuit	This DTC indicates the redundant run/start ignition circuit is intermittent. INSPECT the GSM and BCM connectors for damaged or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, Refer to: Steering Wheel and Column Electrical Components .
P2534	Ignition Switch Run/Start Position Circuit Low	This DTC indicates the redundant run/start ignition circuit is shorted to ground. INSPECT the GSM and BCM connectors for damaged or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, Refer to: Steering Wheel and Column Electrical Components .
P2535	Ignition Switch Run/Start Position Circuit High	This DTC indicates the redundant run/start ignition circuit is shorted to power. INSPECT the GSMand BCM connectors for damaged or pushed-out terminals. If DTCs B108A:01 and/or B1142:29 are present, Refer to: Steering Wheel and Column Electrical Components .
U0029	Vehicle Communication Bus "A" Performance	If DTC P0607 is present along 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: Communications Network .
U0073	Control Module Communication Bus "A" Off	Park may be available only by door or seat belt changing state. Stay In Neutral may be disabled. Neutral Tow may be disabled. Exit from Neutral Tow may be disabled. INSPECT the connectors for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals. CLEAR the DTC. PERFORM the Network Test. If the DTC returns, Refer to: Communications Network .
U0100	Lost Communication With ECM / PCM "A"	CLEAR the DTC. PERFORM a GWM network test. If DTCs return, GO to Pinpoint Test I
U0103	Lost Communication With Gear 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 J
U0121	Lost Communication With Anti-Lock Brake System (ABS) Control Module	CLEAR the DTC. PERFORM a GWM network test. GO to Pinpoint Test K
U0140	Lost Communication With Body Control Module	CLEAR the DTC. PERFORM a GWM network test. GO to Pinpoint Test L
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	CLEAR the DTC. PERFORM a GWM network test. GO to Pinpoint Test N
U0301	Software Incompatibility with Engine/Powertrain Control Module	CLEAR the DTC. REPROGRAM the original PCM with the latest PCM software. PERFORM the PCM self-test. If the DTC returns, INSTALL a new PCM, Refer to: Powertrain Control Module (PCM) - 1.5L EcoBoost . Refer to: Powertrain Control Module (PCM) - 2.0L EcoBoost . Refer to: Powertrain Control Module (PCM) - 2.5L Duratec . Refer to: Powertrain Control Module (PCM) - 2.7L EcoBoost . PERFORM the Transmission Strategy Download procedure. Refer to: Transmission Strategy Download - 6F35 or Refer to: Transmission Strategy Download Automatic Transmission - 6F50/6F55 (Except Hybrid) .
U0401	Invalid Data Received from ECM/PCM "A"	This DTC indicates the PCM is sending a fault message for one or more data signals the TRCM uses for function. Using the diagnostic scan tool, CLEAR all DTCs. PERFORM a PCM self-test. If PCM DTCs are present, Refer to Engine Controls - Introduction (Except Diesel & Hybrid) . and follow the PCM repair procedures.
U0404	Invalid Data Received from Gear Shift Control Module "A"	This DTC indicates the PCM is able to receive GSM CAN messages but the GSM is indicating a fault on one or more of the data signals the TRCM uses for function. Using the diagnostic scan tool, retrieve GSM DTCs. Refer to GSM chart and follow the GSM repair procedures.
U0415	Invalid Data Received from Anti-Lock Brake System (ABS) Control Module	This DTC indicates the ABS module is sending a fault state for vehicle speed. Using the diagnostic scan tool, retrieve ABS DTCs. Refer to: Anti-Lock Brake System (ABS) and Stability Control . and follow the ABS repair procedures.
U0422	Invalid Data Received from Body Control Module	This DTC indicates the BCM is sending a fault state for one or more signals the TRCM uses for function. Using the diagnostic scan tool, CLEAR all DTCs. PERFORM a BCM self-test. If BCM DTCs are present, Refer to: Body Control Module (BCM) . and follow the BCM repair procedures.