DTC Troubleshooting

DTC POACD (54): Battery Module Temperature Sensor 3 Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 3 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 3) in the DATA LIST with the HDS.

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

YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery module and the BCM module.

3. Check for Temporary DTCs or DTCs with the HDS.

Are DTC P0ASE (50), P0ACB (52), and POACD (54) indicated at the same time?

YES - Go to step 14.

NO - Go to step 4.

4. Turn the ignition switch OFF.
5. Turn the battery module switch OFF.
6. Remove the IPU lid.
7. Disconnect the junction board 12P connector.
8. Connect junction board 12P connector terminal No. 9 to body ground with a jumper wire.






9. Turn the ignition switch ON (II).
10. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 3 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 3) in the DATA LIST with the HDS.

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

YES - Go to step 11.

NO - Replace the battery module, then go to step 24.

11. Turn the ignition switch OFF.
12. Disconnect BCM module connector A (40P).
13. Check for continuity between BCM module connector terminal A15 and junction board 12P connector terminal No. 9.






Is there continuity?

YES - Go to step 31.

NO - Repair open in the wire between the battery module and the BCM module (A15), then go to step 24.

14. Turn the ignition switch OFF.
15. Turn the battery module switch OFF.
16. Remove the IPU lid.
17. Connect junction board 12P connector terminal No. 10 to body ground with a jumper wire.






18. Turn the ignition switch ON (II).
19. Check the IMA BATTERY MODULE TEMPERATURE SENSOR 1 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR I), the IMA BATTERY MODULE TEMPERATURE SENSOR 2 VOLTAGE (IMA BATTERY MODULE TEMPERATURE SENSOR 21, 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 about 4.95 V or more (-40 °F (-40 °C) or less)?

YES - Replace the battery module, then go to step 24.

NO - Go to step 20.

20. Turn the ignition switch OFF.
21. Disconnect the junction board 12P connector.
22. Disconnect BCM module connector A (40P).
23. Check for continuity between BCM module connector terminal A6 and junction board 12P connector terminal No. 10.






Is there continuity?

YES - Go to step 31.

NO - Repair open in the wire between the battery module and the BCM module (A6), then go to step 24.

24. Turn the ignition switch OFF.
25. Reconnect all connectors.
26. Reinstall the IPU lid, then turn the battery module switch ON
27. Turn the ignition switch ON (II).
28. Clear the DTC with the HDS.
29. Check for Temporary DTCs or DTCs with the HDS.

Is DTC POACD (54) indicated?

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

NO - Go to step 30.

30. Monitor the OBD STATUS for DTC POACD (54) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 29, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the battery module and the BCM module, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.

31. Reconnect all connectors.
32. Reinstall the IPU lid, then turn the battery module switch ON.
33. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
34. Check for Temporary DTCs or DTCs with the HDS.

Is DTC POACD (54) indicated?

YES - Check for poor connections or loose terminals at the battery module and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then recheck. If the BCM module was substituted, go to step 1.

NO - Go to step 35.

35. Monitor the OBD STATUS for DTC POACD (54) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the BCM module was updated, troubleshooting is complete. If the BCM module was substituted, replace the original BCM module. If any other Temporary DTCs or DTCs were indicated in step 34, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the battery module and the BCM module. If the BCM module was updated, substitute a known-good BCM module, then recheck. If the BCM module was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.