DTC Troubleshooting
DTC Troubleshooting: P0A62 (27)
DTC P0A62:
V Phase Motor Current Sensor Circuit High Voltage
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. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A62 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MCM and the phase motor current sensor.
5. Turn the ignition switch to LOCK (0).
6. Turn the battery module switch OFF.
7. Do the 12 volt battery terminal disconnection procedure Procedures.
8. Remove the IPU cover IPU Cover Removal/Installation.
9. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.
10. Remove the bolts (A), and disconnect the MCM connector E (B), then move the MCM aside.
11. Remove the four cables (A) from the phase motor current sensor, and wrap the end of the DC-DC converter cable (B) with insulating tape.
NOTE: Check the position of the U phase, the V phase, and the W phase cables before disconnecting them.
12. Remove the bolts (A) and the terminal cover (B).
13. Disconnect the phase motor current sensor 9P connector (A).
14. Reconnect MCM connector E (31P).
15. Do the 12 volt battery terminal reconnection procedure Procedures.
16. Turn the ignition switch to ON (II).
17. Check the V PHASE MOTOR CURRENT SENSOR in the DATA LIST with the HDS.
Is about 4.75 V or more indicated?
YES -
Go to step 18.
NO -
Go to step 22.
18. Turn the ignition switch to LOCK (0).
19. Disconnect MCM connector C (22P).
20. Turn the ignition switch to ON (II).
21. Measure the voltage between body ground and phase motor current sensor 9P connector terminal No. 5.
Is there about 4.75 V or more?
YES -
Repair a short to power in the wire between the phase motor current sensor 9P connector and the MCM (C9), then go to step 26.
NO -
Go to step 38.
22. Turn the ignition switch to LOCK (0).
23. Check for continuity between body ground and phase motor current sensor 9P connector terminal No. 2.
Is there continuity?
YES -
Replace the phase motor current sensor Service and Repair, then go to step 26.
NO -
Go to step 24.
24. Disconnect MCM connector C (22P).
25. Check for continuity between phase motor current sensor 9P connector terminal No. 2 and MCM connector terminal C11.
Is there continuity?
YES -
Go to step 38.
NO -
Repair an open in the wire between the phase motor current sensor 9P connector and the MCM (C11), then go to step 26.
26. Do the 12 volt battery terminal disconnection procedure Procedures.
27. Reconnect all connectors.
28. Reinstall the terminal cover.
29. Reconnect the four cables to the phase motor current sensor.
NOTE: Make sure the cables are correctly positioned before you reconnect them.
30. Reinstall the MCM Service and Repair.
31. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
32. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
33. Do the 12 volt battery terminal reconnection procedure Procedures.
34. Turn the ignition switch to ON (II).
35. Clear the DTC with the HDS.
36. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A62 indicated?
YES -
Check for poor connections or loose terminals at the MCM and the phase motor current sensor, then go to step 1.
NO -
Go to step 37.
37. Monitor the OBD STATUS for DTC P0A62 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 36, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the MCM and the phase motor current sensor, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 34.
38. Do the 12 volt battery terminal disconnection procedure Procedures.
39. Reconnect all connectors.
40. Reinstall the terminal cover.
41. Reconnect the four cables to the phase motor current sensor.
NOTE: Make sure the cables are correctly positioned before you reconnect them.
42. Reinstall the MCM Service and Repair.
43. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.
44. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.
45. Do the 12 volt battery terminal reconnection procedure Procedures.
46. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.
47. Turn the ignition switch to ON (II).
48. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0A62 indicated?
YES -
Check for poor connections or loose terminals at the MCM and the phase motor current sensor. If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 1.
NO -
Go to step 49.
49. Monitor the OBD STATUS for DTC P0A62 in the DTCs MENU with the HDS.
Does the HDS 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 48, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the MCM and the phase motor current sensor. If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.