Service of the powertrain control module (PCM) should normally consist of replacement of the PCM.

If the diagnostic procedures calls for replacing the PCM, perform the following procedures in the following order:

1. Programming the PCM
2. Passlock Learn Procedure
3. Programming the TDC Offset

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Remove the negative battery cables.
2. Remove the PCM from the passenger compartment behind the glove box.
3. Remove the connectors from the PCM.

Important: To prevent possible electrostatic discharge to the PCM, do not touch the component leads, and do not remove the integrated circuit from the carrier.

4. Remove the PCM mounting hardware.

1. Install the PCM mounting hardware.
2. Install the connectors to the PCM.
3. Install the PCM in the passenger compartment behind glove box.
4. Install the negative battery cables.

The malfunction indicator lamp (MIL), antilock and brake lamps will continue to be enabled until the PCM is programmed. Once the programming is complete, the lamps will turn OFF and normal operation will occur.

5. Refer to Powertrain Control Module Replacement/Programming .

1. Verify the following for the setup:

•	The battery is charged.

•	The ignition is ON.

•	The battery/cig. lighter connection is secure.

•	The data link connector is attached.

2. Perform the programming. Refer to the up to date Techline terminal/equipment for user instructions.
3. Perform the Passlock Learn Procedure. Refer to PASSLOCK Reprogramming Seed and Key in Theft Deterrent.
4. After the vehicle has been programed, operate the vehicle until the coolant temperature is more than 77°C (170°F). This will allow the TDC Offset to be programed. Refer to Programming the TDC Offset below..
5. Check the Data list for a TDC Offset.
6. If the PCM fails to reprogram, do the following:

•	Check all the PCM connections.

•	Check the Techline terminal/equipment for the latest software version.

•	Try again to reprogram the PCM. If it fails again, replace the PCM. Refer to Powertrain Control Module Replacement/Programming .

The PCM will automatically activate the TDC Offset program when the engine coolant is more than 77°C (170°F). If the PCM is not programmed with a TDC Offset, a DTC P1214 will set.