DTC Troubleshooting

DTC Troubleshooting: P1574 (68)

DTC P1574:

Battery Module Temperature Signal 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 IPU module fan duct is blocked, DTC P1574 may be detected.
- 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 for Pending or Confirmed DTCs with the HDS.

Is DTC P0A9D, P0A9E, P0AC7, P0AC8, P0ACC, or P0ACD indicated?

YES -

Go to the indicated DTC's troubleshooting.

NO -

Go to step 4.

4. Do the IPU MODULE FAN DRIVE in the INSPECTION MENU with the HDS.

Is the IPU module fan OK?

YES -

Go to step 5.

NO -

Do the troubleshooting for DTC P1448 DTC Troubleshooting.

5. Start the engine.

6. Check IMA BATTERY TEMPERATURE SENSOR 1, IMA BATTERY TEMPERATURE SENSOR 2, and IMA BATTERY TEMPERATURE SENSOR 3 in the DATA LIST with the HDS.

NOTE: If the vehicle is left in a place where air temperature is 5 °F (-15 °C) or less for a long time, leave it in doors for one night at 32 °F (0 °C) or more.

Are any of the values more than 131 °F (55 °C), or less than 3.6 °F (-15.8 °C) indicated?

YES -

Replace the battery module Service and Repair, then go to step 8.

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 -

Intermittent failure, the system is OK at this time.

NO -

Repair the IPU module air duct or the IPU module fan as needed, then go to step 8.

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

9. Clear the DTC with the HDS.

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

Is DTC P1574 indicated?

YES -

Go to step 1.

NO -

Go to step 11.

11. Start the engine.

12. Check the SOC in the DATA LIST with the HDS.

13. Hold the engine speed between 3,500 and 4,000 rpm without load (in P or N) until the SOC increases to the maximum.

14. Monitor the OBD STATUS for DTC P1574 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -

Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 10, go to the indicated DTC's troubleshooting.

NO -

If the HDS indicates FAILED, go to step 1. If the HDS indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.