DTC Troubleshooting
DTC Troubleshooting: P0A3F (89)
DTC P0A3F (89):
Motor Rotor Position Sensor 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. Clear the DTC with the HDS Initial Inspection and Diagnostic Overview.
3. Start the engine, and wait 30 seconds.
4. 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, the 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.
5. Turn the ignition switch to LOCK (0).
6. Turn the battery module switch OFF High Voltage Safety.
7. Remove the IPU lid IPU Lid Removal/Installation.
8. Remove the BCM module Service and Repair.
9. Disconnect the MCM 20P connector.
10. Check for continuity between body ground and these MCM 20P connector terminals individually:
- No. 3
- No. 4
- No. 5
- No. 6
- No. 7
- No. 8
Is there continuity?
YES -
Go to step 11.
NO -
Go to step 13.
11. Disconnect the motor rotor position sensor 6P connector.
12. At the motor rotor position sensor side, check for continuity between body ground and the motor rotor position sensor 6P connector terminals individually.
Is there continuity?
YES -
Replace the motor rotor position sensor Service and Repair, then go to step 16.
NO -
Repair short to ground in the wire between the motor rotor position sensor and the MCM, then go to step 16.
13. Measure the resistance between these MCM 20P connector terminals individually:
- No. 4 and No. 6
- No. 3 and No. 5
- No. 7 and No. 8
Is there 21.6-34.4 Ohms (No. 4 and No. 6), 19.9-31.7 Ohms (No. 3 and No. 5), and 11.0-17.4 Ohms (No. 7 and No. 8)?
YES -
Go to step 23.
NO -
Go to step 14.
14. Disconnect the motor rotor position sensor 6P connector.
15. At the motor rotor position sensor side, measure the resistance between these motor rotor position sensor 6P connector terminals individually:
- No. 1 and No. 4
- No. 2 and No. 5
- No. 3 and No. 6
Is there 21.4-34.2 Ohms (No. 1 and No. 4), 19.7-31.5 Ohms (No. 2 and No. 5), and 10.8-17.2 Ohms (No. 3 and No. 6)?
YES -
Repair open in the wire between the motor rotor position sensor and the MCM, the go to step 16.
NO -
Replace the motor rotor position sensor Service and Repair, then go to step 16.
16. Reconnect all connectors.
17. Reinstall the IPU lid IPU Lid Removal/Installation, then turn the battery module switch ON High Voltage Safety.
18. Turn the ignition switch to ON (II).
19. Clear the DTC with the HDS Initial Inspection and Diagnostic Overview.
20. Start the engine.
21. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F (89) indicated?
YES -
Check for poor connections or loose terminals at the motor rotor position sensor and the MCM, then go to step 1.
NO -
Go to step 22.
22. Monitor the OBD STATUS for DTC P0A3F (89) 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 21, go to the indicated DTC's troubleshooting.�
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, keep idling until a result comes on.
23. Reconnect all connectors.
24. Reinstall the IPU lid IPU Lid Removal/Installation, then turn the battery module switch ON High Voltage Safety.
25. 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.
26. Start the engine.
27. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F (89) 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 Initial Inspection and Diagnostic Overview, then go to step 26. If the MCM was substituted, go to step 1.
NO -
Go to step 28.
28. Monitor the OBD STATUS for DTC P0A3F (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 Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 27, go to the indicated DTC's troubleshooting.�
NO -
If the screen indicates FAILED, 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 Initial Inspection and Diagnostic Overview, then go to step 26. If the MCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.