DTC Troubleshooting

DTC Troubleshooting: P1297

DTC P1297:

ELD 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.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Check the ELD in the DATA LIST with the HDS.

Is 72 A or more 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 ELD and the PCM.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Disconnect the ELD 3P connector.

5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

6. Check the ELD in the DATA LIST with the HDS.

Is 72 A or more indicated?

YES -

Go to step 7.

NO -

Go to step 11.

7. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

8. Jump the SCS line with the HDS.

9. Disconnect PCM connector A (49P).

10. Check for continuity between PCM connector terminal A10 and body ground.





Is there continuity?

YES -

Repair a short in the wire between the PCM (A10) and the ELD, then go to step 13.

NO -

Go to step 20.

11. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

12. Replace the ELD Service and Repair.

13. Reconnect all connectors.

14. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

15. Reset the PCM with the HDS.

16. Do the PCM idle learn procedure PCM Idle Learn Procedure.

17. Start the engine.

18. Turn on the headlights.

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

Is DTC P1297 indicated?

YES -

Check for poor connections or loose terminals at the ELD and the PCM, 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.

20. Reconnect all connectors.

21. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.

22. Start the engine.

23. Turn on the headlights.

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

Is DTC P1297 indicated?

YES -

Check for poor connections or loose terminals at the ELD and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 22. If the PCM was substituted, go to step 1.

NO -

If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.