P0602 (91)

DTC PO602 (91): MCM Programming Error

NOTE:
- To verify this is the appropriate troubleshooting procedure, jump the SCS with the HDS and read the flash code, or change the HDS setup to show HM codes and read the HM code.
- Before you troubleshoot, record all freeze data, and review the general troubleshooting information.
- Do not turn the ignition switch OFF while updating the MCM. If you turn the ignition switch OFF before completion, the MCM can be damaged.

1. Do the MCM update procedure
2. Check for IMA system Temporary DTCs or DTCs with the HDS.

Is DTC PO602 (91) indicated?

YES - Replace the original MCM, then go to step 1.

NO - The update is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.