Manufacturer Code Charts: 89
DTC Troubleshooting: P0A3F (89)
DTC P0A3F:
Motor Rotor Position Sensor Circuit Malfunction
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.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Monitor the OBD STATUS for P0A3F in the DTCs MENU with the HDS.
Does the HDS indicate FAILED?
YES -
Go to step 5.
NO -
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IMA motor rotor position sensor and the MCM. If the HDS indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.�
5. Turn the ignition switch to LOCK (0).
6. Turn the battery module switch OFF.
7. Remove the IPU cover IPU Cover Removal/Installation.
8. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.
9. Disconnect MCM connector B (24P).
10. Check for continuity between these MCM connector B (24P) terminals individually:
- B6 and body ground
- B7 and body ground
- B15 and body ground
- B16 and body ground
- B23 and body ground
- B24 and body ground
Is there continuity between all the connectors and body ground?
YES -
Go to step 11.
NO -
Go to step 13.
11. Disconnect the IMA motor rotor position sensor 6P connector (A).
12. Check for continuity between these MCM connector B (24P) terminals individually:
- B6 and body ground
- B7 and body ground
- B15 and body ground
- B16 and body ground
- B23 and body ground
- B24 and body ground
Is there continuity between all the connectors and body ground?
YES -
Repair a short to ground in the wire between the IMA motor rotor position sensor and the MCM (B6, B7, B15, B16, B23, B24), then go to step 16.
NO -
Replace the IMA motor rotor position sensor Service and Repair, then go to step 16.
13. Measure the resistance between these MCM connector B (24P) terminals individually:
- B6 and B7
- B15 and B16
- B23 and B24
Is there 11.0-17.4 Ohms between B6 and B7, 21.6- 34.4 Ohms between B15 and B16, and 19.9-31.7 Ohms between B23 and B24?
YES -
Check for poor connections or loose terminals at the MCM, then go to step 23.
NO -
Go to step 14.
14. Disconnect the IMA motor rotor position sensor 6P connector (A).
15. Check for continuity between these terminals:
- MCM connector terminal B6 and IMA motor rotor position sensor 6P terminal No. 4
- MCM connector terminal B7 and IMA motor rotor position sensor 6P terminal No. 1
- MCM connector terminal B15 and IMA motor rotor position sensor 6P terminal No. 6
- MCM connector terminal B16 and IMA motor rotor position sensor 6P terminal No. 3
- MCM connector terminal B23 and IMA motor rotor position sensor 6P terminal No. 5
- MCM connector terminal B24 and IMA motor rotor position sensor 6P terminal No. 2
Is there continuity between all of the terminals?
YES -
Replace the IMA motor rotor position sensor Service and Repair, then go to step 16.
NO -
Repair an open in the wire between the IMA motor rotor position sensor and the MCM (B6, B7, B15, B16, B23, B24), then go to step 16.
16. Reconnect all connectors.
17. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
18. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
19. Turn the ignition switch to ON (II).
20. Clear the DTC with the HDS.
21. Start the engine.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F indicated?
YES -
Check for poor connections or loose terminals at the IMA motor rotor position sensor and the MCM, then go to step 1.
NO -
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�
23. Reconnect all connectors.
24. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
25. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
26. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.
27. Start the engine.
28. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F indicated?
YES -
Check for poor connections or loose terminals at the IMA motor rotor position sensor and the MCM. If the MCM was updated, substitute a known-good MCM, then recheck. If the MCM was substituted, go to step 1.
NO -
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, go to the indicated DTC's troubleshooting.�