P0603

DTC Troubleshooting: P0603, P062F

DTC P0603:

ECM Internal Control Module Keep Alive Memory (KAM) Error ('06-08 models)

DTC P062F:

ECM Internal Control Module Keep Alive Memory (KAM) Error ('09-11 models)

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
- Information marked with an asterisk (*) applies to '06-08 models.
- Information marked with a double asterisk (**) applies to '09-11 models.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0603* (P062F)** indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time.�

4. Update the ECM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM.

5. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0603* (P062F)** indicated?

YES -

If the ECM was updated, substitute a known-good ECM, then recheck. If the ECM was substituted, go to step 1.

NO -

If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�