DTC Troubleshooting

DTC Troubleshooting: P1437 (41)

DTC P1437 (41):

Motor Power Inverter (MPI) Module Short Circuit

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
- If the DTC cannot be cleared, do the troubleshooting for DTC U1204 (55).

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

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), and wait 1 minute.

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

5. Turn the headlights on high beam.

6. Start the engine, and let it idle for 1 minute.

7. Monitor the OBD STATUS for DTC P1437 (41) in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES -

Go to step 8.

NO -

If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates NOT COMPLETED, go to step 1.

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

Is DTC P06B1 (79), P0AA6 (59), P1440 (57), P15A5 (85), or P1634 (47) indicated?

YES -

Go to the indicated DTC's troubleshooting.�

NO -

Replace the MPI module Service and Repair, then go to step 9.

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

10. Clear the DTC with the HDS.

11. Turn the ignition switch to LOCK (0), and wait 1 minute.

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

13. Turn the headlights on high beam.

14. Start the engine, and let it idle for 1 minute.

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

Is DTC P1437 (41) indicated?

YES -

Check for poor connections or loose terminals at the MPI module, then go to step 1.

NO -

Go to step 16.

16. Monitor the OBD STATUS for DTC P1437 (41) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 15, go to the indicated DTC's troubleshooting.�

NO -

If the screen indicates FAILED, check for poor connections or loose terminals at the DC-DC converter and the MPI module, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.