Transmission Control Module (TCM)

REMOVAL

NOTE: If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.

Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
Remove the left front wheel and tire assembly. Refer to TIRE AND WHEEL, REMOVAL AND INSTALLATION .
Remove the lower TCM fasteners.

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1 - Lower TCM Fasteners
Remove the support and lower the vehicle.
Disconnect the TCM wire harness connector.

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1 - TCM Wire Harness Connector
Remove the upper TCM fasteners.

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1a - TCM Upper Fasteners

1b - TCM
Remove the TCM from the vehicle.

INSTALLATION

Follow the removal procedure in reverse for general reassembly of the components on the vehicle. The steps listed below are calling out specific procedures that should be followed during installation.

NOTE:

When replacing a TCM, the TCM must be programmed. Failure to properly program the TCM may result in the illumination of the Malfunction Indicator Lamp (MIL) and setting DTC(s).

NOTE:

The Valve Body Solenoid Learn procedure must be performed when the TCM and/or valve body is replaced. Failure to perform the Valve Body Solenoid Learn procedure will result in reduced shift quality.

Tighten the fasteners securely.
If this ECU is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under BCM Miscellaneous Functions menu.
Perform TCM programming and verification. Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .