Automatic Transmission External Controls DTCS: GSM

NOTE: If a GSM self-test is performed, the driver door must be closed and locked. A false P166B DTC sets if the driver door is opened or unlocked during the self-test.

NOTE: If a GSM self-test is performed, do not apply the brake pedal. A false P081F DTC sets if the brake pedal is applied during the self-test.

DTC	Description	Action
P0605	Internal Control Module Read Only Memory (ROM) Error	CLEAR the DTC. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P0606	Control Module Processor	CLEAR the DTC. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P0607	Control Module Performance	CLEAR the DTC. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P06B8	Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error	CLEAR the DTC. REPROGRAM the original GSM with the latest software. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P07EC	Transmission Range Multi-Function Select Circuit	The Brake Transmission Shift Interlock (BTSI) override switch contains 2 contacts. If one of the 2 contacts is not recognized by the GSM, P07EC may set. CLEAR the DTC. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P07ED	Transmission Range Multi-Function Select Circuit Stuck	The GSM contains 3 contacts beneath each button. If two or more contacts are not recognized by the GSM then DTC P07ED sets. The Brake Transmission Shift Interlock (BTSI) override switch contains 2 contacts. If one of the 2 contacts is not recognized by the GSM, P07EC may set. CLEAR the DTC. PERFORM the GSM self-test. If the DTC returns, INSTALL a new GSM. REFER to: Gear Shift Module (GSM)
P07F2	Transmission Range Control Module Communication Circuit	This DTC indicates an issue with the redundant communication wire between the GSM and TRCM. Perform the network test. If DTC P07F2 returns, GO to Pinpoint Test C
P07F3	Transmission Range Control Module Communication Circuit Low	This DTC indicates an issue with the redundant communication wire between the GSM and TRCM. If DTC P07F3 returns, GO to Pinpoint Test C
P07F4	Transmission Range Control Module Communication Circuit High	This DTC indicates an issue with the redundant communication wire between the GSM and TRCM. Perform the network test. If DTC P07F4 returns, GO to Pinpoint Test C
P081F	Brake Transmission Shift Interlock (BTSI) Signal Correlation	This DTC by itself points to an issue with the redundant BTSI input wire between the GSM and BCM. Perform on demand self test with the GSM without the brake depressed. If the DTC returns, go to Pinpoint Test D for a short to power. If DTC does not return, apply brake for 30 seconds. If the DTC returns, proceed to Pinpoint Test D for a open circuit or short to ground. the network test. If DTC (diagnostic trouble code) P081F returns, GO to Pinpoint Test D
P164E	Internal Control Module Transmission Range Performance	The EPB is applied 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. REFER to: Gear Shift Module (GSM)
P166B	Drivers Door Status Correlation	Open then close the drivers door and cycle the door locks. If the door ajar icon is illuminated on the IPC or the door lock and unlock is not working correctly, Refer to: Locks, Latches and Entry Systems . If the door ajar and locks are working correctly, GO to Pinpoint Test E
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	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"	GO to Pinpoint Test I
U0121	Lost Communication With Anti-Lock Brake System (ABS) Control Module	GO to Pinpoint Test K
U0140	Lost Communication With Body Control Module	GO to Pinpoint Test L
U0151	Lost Communication With Restraints Control Module	GO to Pinpoint Test M
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	GO to Pinpoint Test N
U019E	Lost Communication With Transmission Range Control Module	If DTC 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 O
U0203	Lost Communication With "Door Control Module E": No Sub Type Information	GO to Pinpoint Test P
U0301	Software Incompatibility with Engine/Powertrain Control Module	Transmission can not exit Park. CLEAR the DTC. REPROGRAM the original PCM with the latest Lincoln PCM software. PERFORM the PCM self-test. If the DTC returns, Refer to PCM Guided Routine Testing .
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 GSM 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 procedure.
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 GSM 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) . Follow the BCM repair procedures.
U0452	Invalid Data Received From Restraints Control Module	This DTC indicates the RCM is sending a fault state for the drivers seat belt. Using the diagnostic scan tool, CLEAR all DTCs. PERFORM a RCM self-test. If RCM DTCs are present, Refer to: Airbag Supplemental Restraint System (SRS) . and follow the RCM repair procedures.
U049F	Invalid Data Received From Transmission Range Control Module	This DTC indicates the PCM is able to receive TRCMCAN messages but the TRCM is indicating a fault on one or more of the data signals the GSM uses for function. Using the diagnostic scan tool, retrieve TRCM DTCs. REFER to DTC Chart - TRCM and follow the TRCM repair procedures.
U0504	Invalid Data Received From "Door Control Module E"	This DTC indicates the Door Control Module E" is sending a fault state for one or more signals the GSM uses for function. Using the diagnostic scan tool, CLEAR all DTCs. PERFORM a Door Control Module E" self-test. If Door Control Module E" DTCs are present, Refer to: Locks, Latches and Entry Systems . Follow the Door Control Module E" repair procedures.
U1011	Invalid Internal Control Module Monitoring Data Received from ECM/PCM	This DTC indicates the PCM is sending a fault message for one or more data signals the GSM 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) . Follow the PCM repair procedure.