Manufacturer Code Charts: 49

DTC Troubleshooting: P0A9D (49)

DTC P0A9D:

Battery Module Temperature Sensor 1 Circuit Low 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 0.05 V or less (194 °F (90 °C) or more) 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. Turn the ignition switch to LOCK (0).

5. Turn the battery module switch OFF.

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

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






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

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

Is 0.05 V or less (194 °F (90 °C) or more) indicated?

YES -

Go to step 10.

NO -

Replace the battery module Service and Repair, then go to step 14.

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

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

12. Disconnect MCM connector B (24P).

13. Check for continuity between MCM connector terminal B21 and body ground.





Is there continuity?

YES -

Repair a short to ground in the wire between the junction board 12P connector and the MCM (B21), then go to step 14.

NO -

Go to step 21.

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

15. Reconnect all connectors.

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

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

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

19. Clear the DTC with the HDS.

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

Is the DTC P0A9D indicated?

YES -

Check for poor connections, loose terminals, or damaged insulation 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.�

21. Reconnect all connectors.

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

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

24. Update the MCM if it does not have the latest software Testing and Inspection, or substitute a known-good MCM.

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

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

Is DTC P0A9D indicated?

YES -

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

NO -

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, go to the indicated DTC's troubleshooting.�