DTC Troubleshooting

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.

1. Turn the ignition switch 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 PCM.

3. Turn the ignition switch OFF.
4. Disconnect the ELD 3P connector.
5. Turn the ignition switch 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 OFF.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector E (31P).




10. Check for continuity between PCM connector terminal E18 and body ground.

Is there continuity?

YES - Repair short in the wire between the PCM (E18) and the ELD, then Go to step 13.

NO - Go to step 20.

11. Turn the ignition switch OFF.
12. Replace the under-hood fuse/relay box.
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the PCM with the HDS.
16. Do the PCM idle learn procedure.
17. Start the engine.
18. Turn on the headlights.
19. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1297 indicated?

YES - Check for poor connections or loose terminals at the ELD unit and the PCM, then Go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.

20. Update the PCM if it does not have the latest software, or substitute a known good PCM.
21. Start the engine.
22. Turn on the headlights.
23. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1297 indicated?

YES - Check for poor connections or loose terminals at the ELD unit and the PCM. If the PCM was updated, substitute a known good PCM, then Go to step 21. 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. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.