DTC Troubleshooting

DTC Troubleshooting: P0AEE (109)

DTC P0AEE (109):

MCM Internal Circuit Malfunction

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

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

2. Note the value of the MPI TEMPERATURE in the DATA LIST with the HDS.

3. Start and stop the engine five times.

4. Check the MPI TEMPERATURE in the DATA LIST with the HDS.

Does the MPI TEMPERATURE increase by 1.0 °F (0.5 °C) or more?

YES -

Intermittent failure, the system is OK at this time.

NO -

Go to step 5.

5. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM Initial Inspection and Diagnostic Overview.

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

Is DTC P0AEE (109) indicated?

YES -

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

NO -

Go to step 7.

7. Monitor the OBD STATUS for DTC P0AEE (109) 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 MCM Replacement. If any other Pending or Confirmed 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 Initial Inspection and Diagnostic Overview, 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.