Powertrain Control Module Replacement/Programming Replacement

Notice: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.

Service of the PCM should normally consist of either replacement of the PCM, EEPROM re-programming.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked first to see if it is the correct part. DTC P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, re-program the EEPROM.

1. Disconnect the negative battery cable.
2. Remove the LH hush panel.



3. Loosen the PCM connector screws (1).




Notice: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage. Do not remove the integrated circuit boards from the carrier.

4. Disconnect the PCM electrical connectors.
5. Remove the PCM Retainer.
6. Slide the PCM from the PCM bracket.

Remove the new PCM from its packaging and check the service number to make sure it is the same number or updated number as the faulty PCM.

1. Slide the PCM into the PCM bracket.
2. Install the PCM Retainer.

Notice: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage. Do not remove the integrated circuit boards from the carrier.




3. Install the PCM electrical connectors.



4. Tighten the PCM connector screws (1).
5. Install the LH hush panel.
6. Connect the negative battery cable.

Important :  Replacement PCMs must be reprogrammed and the crankshaft position system variation learn procedure must be performed.

7. Program the EEPROM.
8. The PCM will need to relearn the crankshaft variation. Refer to Powertrain Control Module Replacement/Programming .

1. Set-up - Ensure that the following conditions have been met:

•	The battery is fully charged and a battery charger is disconnected.

•	The ignition is on.

•	The Techline equipment cable connection at the DLC is secure.

2. Program the PCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment users instructions.
3. If the PCM fails to program, proceed as follows:

•	Ensure that all PCM connections are OK.

•	Check the Techline equipment for the latest software version.

•	Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. You must program the replacement PCM.

1. Perform the Powertrain On Board Diagnostic (OBD) System Check .
2. Start the engine and the engine run for one minute.
3. Use the scan tool in order to scan for the DTCs.
4. If DTC P0325 sets, the KS module is not fully seated, is missing, or is malfunctioning.

Powertrain Control Module Replacement/Programming Password Learn

In order for a theft deterrent vehicle to run, a password is communicated between the Body Function Control (BFC) and the PCM. If a PCM is replaced, the new PCM needs to learn the correct password of the vehicle. When the new PCM is installed, the EEPROM calibration is flashed into the new PCM and the vehicle will learn the new password upon the initial ignition ON cycle. If the Body Function Control (BFC) is replaced, the PCM needs to learn the new password from the Body Function Control (BFC). The password learn procedure is as follows:

1. Attempt to the start vehicle. The vehicle will stall.
2. Leave the ignition ON until the Theft System telltale turns OFF (approx.10 minutes).
3. Turn the ignition switch OFF.
4. Attempt to the start vehicle. The vehicle will start on the this attempt. The password is now learned.

Attempting to start the vehicle by bypassing the Passlock ll system or substituting parts without performing the password learn procedure may set a DTC P1630 and P1631.

If no password is received a DTC P1610 and P1626 may be set.

Refer to the applicable DTC table if set.

Powertrain Control Module Replacement/Programming CKP Variation Learn Procedure

The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set refer to DTC P0300 Engine Misfire Detected .

The Crankshaft Position System Variation Learn Procedure should be performed if any of the following conditions are true:

Important:  The scan tool crankshaft position system variation learn function will be inhibited if engine coolant temperature is less than 70°C (158°F). Allow the engine to warm to at least 70°C (158°F) before attempting the crankshaft position system variation learn procedure.

1. Set the parking brake.
2. Start the engine and allow engine coolant temperature to reach at least 70°C (158°F).
3. Turn OFF the ignition switch.
4. Select the crankshaft position variation learn procedure from the scan tool special functions list.
5. Follow the instructions displayed on the scan tool. If the procedure is terminated, refer to Important above for instructions.
6. Observe DTC status for DTC P1336.
7. If the scan tool indicates that DTC P1336 ran and passed, the crankshaft position system variation learn procedure is complete. If the scan tool indicates DTC P1336 failed or not run, check for other DTCs. If no DTCs other than P1336 are set, repeat the crankshaft position system variation learn procedure as necessary.