DTC Troubleshooting
DTC Troubleshooting: P15A5 (85)
DTC P15A5:
Motor Current 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. Check under these conditions:
- Headlights on high beam
- Blower fan at maximum speed
- Rear window defogger on
4. Start the engine, and let it idle 1 minute.
5. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A3F, P0A5E, P0A5F, P0A61, P0A62, P0A64, P0A65, P0BE6, P0BEA, P0BEE, P0BFD, P1437, and/or P1440 indicated?
YES -
Go to the indicated DTC's troubleshooting.
NO -
Go to step 6.
6. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate with light braking.
7. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P15A5 indicated?
YES -
Go to step 8.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the phase motor current sensor and the IMA motor power cable.
8. At idle, individually check the U PHASE MOTOR CURRENT SENSOR, the V PHASE MOTOR CURRENT SENSOR, and the W PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Do the values vary from 0 A?
YES -
Replace the phase motor current sensor Service and Repair, then go to step 31.
NO -
Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Turn the battery module switch OFF.
11. Remove the IPU cover IPU Cover Removal/Installation.
12. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.
13. Disconnect MCM connector C (22P).
14. Disconnect the MPI module 12P connector (A).
15. Check for continuity between these terminals:
- MCM connector terminal C15 and MPI module 12P connector terminal No. 8.
- MCM connector terminal C22 and MPI module 12P connector terminal No. 2.
- MCM connector terminal C21 and MPI module 12P connector terminal No. 9.
- MCM connector terminal C7 and MPI module 12P connector terminal No. 3.
- MCM connector terminal C14 and MPI module 12P connector terminal No. 10.
- MCM connector terminal C6 and MPI module 12P connector terminal No. 4.
Is there continuity?
YES -
Go to step 16.
NO -
Repair an open in the wire between the MPI module 12P connector and the MCM (C6, C7, C14, C15, C21, C22), then go to step 31.
16. Check for continuity between body ground and these MCM connector C (22P) terminals individually:
- C6
- C7
- C14
- C15
- C21
- C22
Is there continuity?
YES -
Repair a short in the wire between the MPI module 12P connector and the MCM (C6, C7, C14, C15, C20, C22), then go to step 31.
NO -
Go to step 17.
17. Remove the IMA motor power cables (A) from the phase motor current sensor.
NOTE: Check the position of the U phase, the V phase, and the W phase cables before disconnecting them.
18. Disconnect the IMA motor power cable connector (A) from the motor stator.
NOTE:
- Refer to disconnecting the IMA motor power cable connector from the motor stator.
- If the IMA motor power cable terminals are wet, dry them with a clean shop towel. Do not use compressed air.
19. Check for continuity between IMA motor power cable terminals A and B, B and C, and C and A individually.
Is there continuity?
YES -
Replace the IMA motor power cable Service and Repair, then go to step 31.
NO -
Go to step 20.
20. Substitute a known-good MPI module.
21. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate with light braking.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P15A5 indicated?
YES -
Go to step 23.
NO -
Replace the MPI module Service and Repair, then go to step 31.
23. Turn the ignition switch to LOCK (0).
24. Reconnect all connectors.
25. Reinstall the PCU lid, the PCU busplate and the PCU cover Service and Repair.
26. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
27. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.
28. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate with light braking.
29. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P15A5 indicated?
YES -
If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 30.
NO -
If the MCM was updated, troubleshooting is complete. If the MCM was substituted, replace the original MCM Service and Repair.
30. Replace the IMA motor housing IMA Motor Housing Removal/Installation, then go to step 35.
31. Turn the ignition switch to LOCK (0).
32. Reconnect all connectors.
33. If removed, reinstall the PCU lid, the PCU busplate and the PCU cover Service and Repair.
34. If removed, reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
35. Turn the ignition switch to ON (II).
36. Clear the DTC with the HDS.
37. Test-drive the vehicle using wide open throttle for at least 2 seconds, then decelerate using light braking.
38. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P15A5 indicated?
YES -
Check for poor connections or loose terminals at the phase motor current sensor and the IMA motor power cable, then go to step 1.
NO -
Go to step 39.
39. Monitor the OBD STATUS for DTC P15A5 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 38, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the phase motor current sensor and the IMA motor power cable, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 37.