DTC Troubleshooting
DTC P15A5 (85): Motor Current Sensor Circuit MalfunctionNOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information.
1. Start the engine, and let it idle for 10 seconds.
2. Check for 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 using 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, the 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.
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 27.
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 (6) from the MCM.
NOTE: Wrap the motor power cables with insulating tape.
11. Disconnect the motor power cable connector (A) from the motor stator.
NOTE: Refer to disconnecting the motor power cable If the motor power cable terminals are wet, dry connector from the motor stator. them with a clean towel. Do not use compressed air.
12. Measure resistance between motor power cable terminals A and 6, Band C, and C and A individually.
NOTE: Use the 250 V range of your insulated resistance tester, and wear gloves.
Is there more than 350 kohms?
YES - Go to step 13.
NO - Replace the motor power cable, then go to step 19.
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 using wide open throttle for at least 2 seconds, then decelerate with light braking.
18. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P15A5 (85) indicated?
YES - If the MCM was updated, substitute a known-good MCM, then go to step 17. If the MCM was substituted, replace the motor stator, then go to step 1.
NO - If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
19. Turn the ignition switch OFF.
20. Reconnect all connectors.
21. Reinstall the IPU lid, then turn the battery module switch ON.
22. Turn the ignition switch ON (II).
23. Clear the DTC with the HDS.
24. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate using light braking.
25. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P15A5 (85) indicated?
YES - Check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator, then go to step 1.
NO - Go to step 26.
26. Monitor the OBD STATUS for DTC P15A5 (85) in the DTCs MENU with the MDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 25, go to the indicated DTC's troubleshooting.
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 24.
27. Turn the ignition switch OFF.
28. Reinstall the IPU lid, then turn the battery module switch ON.
29. Update the MCM if it does not have the latest software, or substitute a known-good MCM.
30. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate using light braking.
31. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P15A5 (85) indicated?
YES - Check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator, If the MCM was updated, substitute a known-good MCM, then go to step 30. If the BCM module was substituted, go to step 1.
NO - GO to step 32.
32. 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. If any other Temporary DTCs or DTCs were indicated in step 31, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the motor power cable, the MCM, and the motor stator. If the MCM was updated, substitute a known-good MCM, then go to step 30. If the MCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 30.