DTC Troubleshooting: P1297 (20)

DTC P1297:  ELD Circuit Low Voltage

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 3.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.n


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 7.


NO - Go to 11.


7.Turn the ignition switch OFF.

8.Jump the SCS line with the HDS.

9.Disconnect ECM/PCM connector E (31P).

10.Check for continuity between ECM/PCM connector terminal E15 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the ECM/PCM (E15) and the ELD, then go to 13.


NO - Go to 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 ECM/PCM with the HDS.

16.Do the ECM/PCM idle learn procedure.

17.Start the engine.

18.Turn on the headlights.

19.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n

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

21.Start the engine.

22.Turn on the headlights.

23.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - If the ECM/PCM was updated, troubleshooting was completed. If the ECM/PCM was substituted, replace the original ECM/PCM.n