DTC Troubleshooting

DTC POAEE (109): MCM Internal Circuit Malfunction

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

1. Turn the ignition switch ON (II).
2. Note the value of 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, or substitute a known-good MCM.
6. Check for Temporary DTCs or DTCs with the HDS.

Is DTC POAEE (109) 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 POAEE (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. 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.