DTC 85

DTC P15A5 (85): Motor Current Sensor Circuit Malfunction
1. Start the engine, and let it idle 10 seconds.
2. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P0A5E (24), P0A5F (25), P0A61 (26), P0A62 (27), P0A64 (28), P1440 (57), P0A3F (89), and/or P0A65 (29) indicated?
YES - Go to the indicated DTC's troubleshooting.
NO - Go to step 3.

3. Test-drive the vehicle at wide open throttle for at least 2 seconds, then decelerate with light braking.
4. Monitor the OBD STATUS for DTC P15A5 (85) 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 power cable, the motor stator, and the MCM. If the screen indicates NOT COMPLETED, go to step 3 and recheck.

5. Do the MOTOR ROTOR POSITION CALIBRATION in the IMA ADJUSTMENT MENU with the HDS.
Does the screen indicate COMPLETE?
YES - Go to step 6.
NO - Do the MOTOR ROTOR POSITION CALIBRATION.

6. At idle, individually check the U PHASE MOTOR CURRENT SENSOR, V PHASE MOTOR CURRENT SENSOR, and W PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Do the values vary from 0 A?
YES - Go to step 29.
NO - Go to step 7.

7. Turn the ignition switch OFF.
8. Turn the battery module switch OFF.
9. Remove the IPU lid.
10. Lift the harness holder. Remove the PDU cover (A) and the motor power cables (B) from the MCM.





11. Disconnect the motor power cable connector from the motor stator.





12. Measure resistance between motor power cable terminals A and B, B and C, and C and A individually.

NOTE: Use the 250 V range of your insulated resistance tester, and wear gloves.





Is there 350 k ohms or more?
YES - Go to step 23.
NO - Replace the motor power cable, then go to step 13.

13. Turn the ignition switch OFF.
14. Reconnect all connectors.
15. Reinstall the IPU lid, then turn the battery module switch ON.
16. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
17. Test-drive the vehicle at wide open throttle for at least 2 seconds, then decelerate with light braking.
18. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A5 (85) is indicated, check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator, then go to step 19. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM.

19. Replace the motor stator.
20. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate using light braking.
21. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A5 (85) is indicated, check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator, 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 22.

22. Monitor the OBD STATUS for DTC P15A5 (85) 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 power cable, the MCM, and the motor stator, then go to step 1. If the screen indicates NOT COMPLETED, go to step 20 and recheck.

23. Turn the ignition switch OFF.
24. Reinstall the IPU lid, then turn the battery module switch ON.
25. Turn the ignition switch ON (II).
26. Reset the MCM with the HDS.
27. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate using light braking.
28. Check for IMA system Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15A5 (85) is indicated, check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.

29. Reinstall the IPU lid, then turn the battery module switch ON.
30. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
31. Test-drive the vehicle at wide open throttle for at least 2 seconds, then decelerate with light braking.
32. Check for IMA system Temporary DTCs or DTCs with the HDS.
Is DTC P15A5 (85) indicated?
YES - Check for poor connections or loose terminals at the MCM motor power cable, the MCM, and the motor stator. If the MCM was updated, substitute a known-good MCM, then go to step 22. If the MCM was substituted, go to step 1.
NO - If no Temporary DTCs or DTCs are indicated, go to step 33. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

33. Monitor the OBD STATUS for DTC P15A5 (85) 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 power cable, the MCM, and the motor stator, then go to step 1. If the screen indicates NOT COMPLETED, go to step 31.