DTC Troubleshooting
DTC Troubleshooting: P06B1 (79)
DTC P06B1 (79):
Battery 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 (55).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P06B1 (79) indicated?
YES -
Go to step 4.
NO -
Intermittent failure, the system is OK at this time.�
4. Turn the ignition switch to LOCK (0).
5. Turn the battery module switch OFF.
6. Do the 12 volt battery terminal disconnection procedure Procedures.
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. Remove the bolts (A), and disconnect the MCM connector E (B), then move the MCM aside.
10. 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.
11. Remove the bolts (A) and the terminal cover (B).
12. Disconnect the phase motor current sensor 9P connector (A).
13. Do the 12 volt battery terminal reconnection procedure Procedures.
14. Clear the DTC with the HDS.
15. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P06B1 (79) indicated?
YES -
Go to step 16.
NO -
Replace the phase motor current sensor Service and Repair, then go to step 26.
16. Disconnect MCM connector C (22P).
17. Clear the DTC with the HDS.
18. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P06B1 (79) indicated?
YES -
Go to step 21.
NO -
Go to step 19.
19. Check for continuity between MCM connector terminal C1 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C1), then go to step 26.
NO -
Go to step 20.
20. Check for continuity between MCM connector terminal C8 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C8), then go to step 26.
NO -
Repair a short in the wire between the phase motor current sensor 9P connector and the MCM (C16), then go to step 26.
21. Disconnect MCM connector B (24P).
22. Clear the DTC with the HDS.
23. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P06B1 (79) indicated?
YES -
Go to step 38.
NO -
Go to step 24.
24. Disconnect the junction board 12P connector (A).
25. Check for continuity between MCM connector terminal B24 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the junction board 12P connector and the MCM (B24), then go to step 26.
NO -
Replace the battery module Service and Repair, 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, 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 P06B1 (79) indicated?
YES -
Go to step 1.
NO -
Go to step 37.
37. Monitor the OBD STATUS for DTC P06B1 (79) in the DTCs MENU with the HDS.
Does the screen 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 screen indicates FAILED, go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.
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, 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 P06B1 (79) indicated?
YES -
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 P06B1 (79) 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 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 screen indicates FAILED: If the MCM was updated, substitute a known-good MCM, and recheck. If the MCM was substituted, go to step 1.
- If the screen indicates NOT COMPLETED: Keep the ignition switch ON (II) until a result comes on.