Integrated Motor Assist

DTC PO603 (60): MCM Internal Circuit KAM Error

NOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC PI629 (79) indicated?

YES - Do the troubleshooting for DTC PI629 (79).

NO - Go to step 3.

3. Clear the DTC with the HDS.
4. Monitor the OBD STATUS for DTC PO603 (60) in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 5.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MCM. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.

5. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
6. Check for Temporary DTCs or DTCs with the HDS.

Is DTC PO603 (60) indicated?

YES - Check for poor connections or loose terminals at the MCM. If the MCM was updated, substitute a known-good MCM, then recheck. If the MCM was substituted, go to step 1.

NO - Go to step 7.

7. Monitor the OBD STATUS for DTC PO603 (60) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM. If any other Temporary DTCs or DTCs were indicated in step 6, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the MCM. If the MCM was updated, substitute a known-good MCM, then recheck. If the MCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.