PCM/Tac Module Replacement

Description:

IMPORTANT:
^ Do not substitute a PCM from another vehicle for diagnosis. The PCM will not recognize the Vehicle Theft Deterrent password from the BCM. The PCM disables the fuel, and the PCM stores DTC P1631 into history.
^ The following must be performed anytime the PCM is replaced:
- Program the PCM
- The PCM Password Learn procedure
- The Idle Learn Procedure
- The Oil Life reset procedure
- The Functional Check
^ The following must be performed anytime the PCM is disconnected, loses power or is reprogrammed:
- The Idle Learn Procedure
- The Functional Check

REMOVAL PROCEDURE

IMPORTANT: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM.

NOTE: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage to the PCM.

IMPORTANT: The ignition should always be OFF when installing or removing the PCM/TAC module connectors.

1. Raise the vehicle.
2. Remove the right front tire and wheel assembly.
3. Remove the wheelhouse filler panel.




4. Remove the fasteners retaining the Throttle Actuator Control (TAC) module to the PCM mounting bracket.
5. Remove the electrical connectors from the TAC module.
6. Remove the TAC module from the vehicle.





IMPORTANT: The remaining steps are for the PCM replacement.

7. Disconnect the PCM electrical harness connectors.
8. Loosen but do not remove the PCM rear retaining fastener. Use the rear retaining fastener as an anchor for the outer bracket.
9. Remove the front retaining fastener from the PCM.
10. Reposition the PCM outer bracket.
11. Remove the PCM from the bracket and the vehicle.

INSTALLATION PROCEDURE




1. Install the PCM to the PCM rear bracket.
2. Position the PCM front bracket.

NOTE: Refer to Fastener Notice in Cautions and Notices.

3. Install the PCM front retaining fasteners.

Tighten
Tighten the PCM retaining fasteners to 2.2 N.m (17 lb in).




4. Connect the electrical connectors to the PCM.

Tighten
Tighten the PCM electrical connectors to 8 N.m (70 lb in).




5. Connect the electrical connectors to the TAC module.
6. Align the hole in the rear mounting tab of the TAC module to the corresponding hole in the PCM mounting bracket. Position the TAC module below the rear mounting tab for greater clearance in order to install the rear retaining fastener.
7. Install the TAC module rear retaining fastener.
8. Align the front mounting holes of the TAC module.
9. Install the TAC module front retaining fasteners.

Tighten
Tighten the TAC module retaining fasteners to 1.9 N.m (17 lb in).

Description:

10. Install the wheelhouse filler panel.
11. Install the right front tire and wheel assembly.
12. Lower the vehicle.
13. Program the PCM if a new PCM is being installed.