DTC Troubleshooting

DTC Troubleshooting: P0A7F (78)

DTC P0A7F (78):

Battery Module Deterioration

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 (55).

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

2. Clear the DTC with the HDS.

3. Start the engine.

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

5. Hold the engine speed between 3,500 and 4,000 rpm without load (in P or N) until the SOC increases to 25 %.

6. Monitor the OBD STATUS for DTC P1586 (23) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES -

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

NO -

If the screen indicates FAILED, then go to step 7. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.

7. Check for poor connections or loose terminals at the phase motor current sensor and the MCM.

Is the connection OK?

YES -

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

NO -

Repair the connections or the terminals, 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.

Are any DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.�

NO -

Troubleshooting is complete.�