M/T

DTC Troubleshooting: P1297, 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 How to Troubleshoot the Fuel and Emissions Systems.

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

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 ECM/PCM.

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

4. Disconnect the ELD 3P connector.

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

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).

8. Jump the SCS line with the HDS.

9. Disconnect ECM/PCM connector A (49P).

10. Check for continuity between ECM/PCM connector terminal A24 and body ground.





Is there continuity?

YES -

Repair a short in the wire between the ECM/PCM(A24) and the ELD, then go to step 13.

NO -

Go to step 20.

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

12. Replace the ELD Service and Repair.

13. Reconnect all connectors.

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

15. Reset the ECM/PCM with the HDS.

16. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure (M/T).

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 ECM/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 ECM/PCM if it does not have the latest software ECM/PCM Update (M/T), or substitute a known-good ECM/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 ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 22. If the ECM/PCM was substituted, go to step 1.

NO -

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