DTC 89

DTC P0A3F (89): Motor Rotor Position Sensor Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Start the engine.
3. Monitor the OBD STATUS for DTC P0A3F (89) 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, system is OK at this time. Check for poor connections or loose terminals at the motor rotor position sensor and the MCM. If the screen indicates NOT COMPLETED, go to step 1 and recheck.

4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Disconnect MCM 20P connector.
8. Disconnect the motor rotor position sensor 6P connector.
9. Check for continuity between the following MCM 20P connector terminals individually:
^ No. 3 and body ground
^ No. 4 and body ground
^ No. 5 and body ground
^ No. 6 and body ground
^ No. 7 and body ground
^ No. 8 and body ground





Is there continuity?
YES - Repair short to ground in the wire between the motor rotor position sensor and the MCM (No. 3, No. 4, No. 5, No. 6, No. 7, No. 8), then go to step 16.
NO - Go to step 10.

10. Connect the motor rotor position sensor 6P connector terminals to body ground with jumper wires individually.





11. Check for continuity between the following MCM 20P connector terminals individually:
^ No. 3 and body ground
^ No. 4 and body ground
^ No. 5 and body ground
^ No. 6 and body ground
^ No. 7 and body ground
^ No. 8 and body ground





Is there continuity at all the terminals?
YES - Go to step 12.
NO - Repair open in the wire between the motor rotor position sensor and the MCM (No. 3, No. 4, No. 5, No. 6, No. 7, No. 8), then go to step 16.

12. Remove the jumper wire from the motor rotor position sensor 6P connector. Check for continuity between these MCM 20P connector terminals individually:
^ No. 4 and No. 6
^ No. 3 and No. 5
^ No. 7 and No. 8





Is there continuity?
YES - Repair short in the wire(s) that had the continuity between the motor rotor position sensor and the MCM (No. 3, No. 4, No. 5, No. 6, No. 7, No. 8), then go to step 16.
NO - Go to step 13.

13. Measure resistance between motor rotor position sensor 6P connector terminals No. 1 and No. 4.





Is there about 21 - 34 ohms?
YES - Go to step 14.
NO - Replace the motor rotor position sensor, then go to step 16.

14. Measure resistance between motor rotor position sensor 6P connector terminals No. 2 and No. 5.





Is there about 19 - 31 ohms?
YES - Go to step 15.
NO - Replace the motor rotor position sensor, then go to step 16.

15. Measure resistance between motor rotor position sensor 6P connector terminals No. 3 and No. 6.





Is there about 11 - 17 ohms?
YES - Go to step 24.
NO - Replace the motor rotor position sensor, then go to step 16.

16. Turn the ignition switch OFF.
17. Reconnect all connectors.
18. Reinstall the IPU lid, then turn the battery module switch ON.
19. Turn the ignition switch ON (II).
20. Reset the MCM with the HDS.
21. Start the engine.
22. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0A3F (89) is indicated, check for poor connections or loose terminals at the motor rotor position sensor and the MCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 24.

23. Monitor the OBD STATUS for DTC P0A3F in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the motor rotor position sensor and the MCM. If the screen indicates NOT COMPLETED, go to step 22 and recheck.

24. Reinstall the IPU lid, then turn the battery module switch ON.
25. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
26. Start the engine.
27. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P0A3F indicated?
YES - Check for poor connections or loose terminals at the motor rotor position sensor and the MCM. If the MCM was updated, substitute a known-good MCM, then go to step 26. If the MCM was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 28. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

28. Monitor the OBD STATUS for DTC P0A31F (89) 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.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the motor rotor position sensor and the MCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 26.