Manufacturer Code Charts: 50

DTC Troubleshooting: P0A9E (50)

DTC P0A9E:

Battery Module Temperature Sensor 1 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. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 1 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 1) in the DATA LIST with the HDS.

Is 4.95 V or more (-40 °F (-40 °C) or less) indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery module and the MCM.�

4. Check for Pending or Confirmed DTCs with the HDS.

Are DTC P0A9E, P0AC8, and P0ACD indicated at the same time?

YES -

Go to step 20.

NO -

Go to step 5.

5. Turn the ignition switch to LOCK (0).

6. Turn the battery module switch OFF.

7. Remove the IPU cover IPU Cover Removal/Installation.

8. Disconnect the junction board 12P connector (A).






9. Connect junction board 12P connector terminal No. 7 to body ground with a jumper wire.






10. Turn the ignition switch to ON (II).

11. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 1 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 1) in the DATA LIST with the HDS.

Is 4.95 V or more (-40 °F (-40 °C) or less) indicated?

YES -

Go to step 15.

NO -

Go to step 12.

12. Turn the ignition switch to LOCK (0).

13. Disconnect the jumper wire from the junction board 12P connector.

14. Check for continuity between junction board 12P connector terminals No. 7 and No. 9.





Is there continuity?

YES -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery module and the MCM, then go to step 32.

NO -

Replace the battery module Service and Repair, then go to step 32.

15. Turn the ignition switch to LOCK (0).

16. Disconnect the jumper wire from the junction board 12P connector.

17. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.

18. Disconnect MCM connector B (24P).

19. Check for continuity between MCM connector terminal B21 and junction board 12P connector terminal No. 7.





Is there continuity?

YES -

Check for poor connections or loose terminals at the battery module and the MCM, then go to step 32.

NO -

Repair an open in the wire between the junction board 12P connector and the MCM (B21), then go to step 32.

20. Turn the ignition switch to LOCK (0).

21. Turn the battery module switch OFF.

22. Remove the IPU cover IPU Cover Removal/Installation.

23. Disconnect the junction board 12P connector (A).






24. Connect junction board 12P connector terminal No. 9 to body ground with a jumper wire.






25. Reconnect the junction board 12P connector.

26. Turn the ignition switch to ON (II).

27. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 1 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 1), the IMA BATTERY MODULE TEMPERATURE SENSOR 2 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 2), and the IMA BATTERY MODULE TEMPERATURE SENSOR 3 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 3) in the DATA LIST with the HDS.

Do all sensors indicate 4.95 V or more (-40 °F (-40 °C) or less)?

YES -

Replace the battery module Service and Repair, then go to step 32.

NO -

Go to step 28.

28. Turn the ignition switch to LOCK (0).

29. Remove the PCU lid, the PCU busplate, and the PCU cover Service and Repair.

30. Disconnect MCM connector B (24P).

31. Check for continuity between MCM connector terminal B22 and junction board 12P connector terminal No. 9.





Is there continuity?

YES -

Check for poor connections or loose terminals at the junction board 12P connector and the MCM, then go to step 32.

NO -

Repair an open in the wire between the junction board 12P connector and the MCM (B22), then go to step 32.

32. Turn the ignition switch to LOCK (0).

33. Reconnect all connectors.

34. Reinstall the PCU cover, the PCU busplate, and the PCU lid Service and Repair.

35. Reinstall the IPU cover IPU Cover Removal/Installation, then turn the battery module switch ON.

36. Turn the ignition switch to ON (II).

37. Clear the DTC with the HDS.

38. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0A9E indicated?

YES -

Check for poor connections or loose terminals at the battery module and the MCM, then go to step 1.

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�