IMA System

DTC P1574 (68): Battery Module Temperature Signal Circuit Malfunction

NOTE:
- Before you troubleshoot, record all freeze data, and review the general troubleshooting information.
- If the IPU module fan duct is blocked, DTC P1574 (68) may be detected.

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1448 (63) indicated?

YES - Do the troubleshooting for DTC P1448 (63).

NO - Go to step 3.

3. Record the value of IMA BATTERY TEMPERATURE SENSOR 1, IMA BATTERY TEMPERATURE SENSOR 2, and IMA BATTERY TEMPERATURE SENSOR 3 in the DATA LIST with the HDS.
4. Check the SOC in the DATA LIST with the HDS. If the SOC is higher than 65 %, start the engine several times until the SOC decreases to less than 65 %.
5. Start the engine, and hold it between 3,500 rpm and 4,000 rpm without load (in Park or neutral) until the SOC increases to above 70 %.
6. Compare the value of IMA BATTERY TEMPERATURE SENSOR 1, IMA BATTERY TEMPERATURE SENSOR 2, and IMA BATTERY TEMPERATURE SENSOR 3 in the DATA LIST with the HDS to the values noted in step 3.

Do any of the values differ 1.0 °F (0.5 °C) or more?

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

NO - Go to step 7.

7. Check the IPU module air duct and the IPU module fan for disconnections, damage, or obstructions.

Are the IPU module air duct and the IPU module fan OK?

YES - Replace the battery module, then go to step 8.

NO - Repair the IPU module air duct or IPU module fan as needed, then go to step 8.

8. Turn the ignition switch ON (II).
9. Clear the DTC with the HDS.
10. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1574 (68) 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 11.

11. Monitor the OBD STATUS for P1574 (68) 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 11, go to the indicated DTCs 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.