PCM REPLACEMENT
Note. If the PCM and the WIN are replaced at the same time, program the PCM VIN into the PCM first.
Note. The PCM stores the secret key information. If the WIN ever needs to be replaced, the secret key information can be retrieved from the PCM and then transferred to the WIN for security use.
During PCM/ECM replacement, use the following steps to ensure transfer of the secret key information from the WIN to the new PCM
- First replace the PCM/ECM with the original WIN still connected to the vehicle.
- Using the appropriate Service Information program the new PCM/ECM. (This will ensure the Secret Key Transfer from the original WIN into the new PCM/ECM).
- Now replace and program the WIN (if necessary). This will retain the Secret Key from the PCM/ECM back into the new WIN.
- With the scan tool, select Miscellaneous Functions, WIN/Wireless Ignition Node. Then select the desired procedure and follow the display on the scan tool.
- Ensure all the customer's keys have been programmed into the new module if necessary.
- If the WIN was replaced, with the scan tool select "PEM", "Miscellaneous Functions" and perform the "PEM Replace" in the Passive Entry Module (PEM) after the FOBIKS have been programmed.
- If the vehicle is equipped with Tire Pressure Monitoring System program the Placard Pressure Values into the WIN.
- With the scan tool, erase all DTCs. Perform five (5) ignition key cycles, leaving the key on for at least 90 seconds per cycle.
- With the scan tool, read WIN DTCs.