DTC Troubleshooting: P1298 (20) (R18A: M/T)

DTC Troubleshooting: P1298 (20)

DTC P1298:  ELD Circuit High 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 0.2 A or less 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.Measure voltage between ELD 3P connector terminal No. 1 and body ground.

 

Is there battery voltage?


YES - Go to 7.


NO - Check the No. 3 ALTERNATOR (10 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 3 ALTERNATOR (10 A) fuse and the ELD, then go to 12.

7.Jump the SCS line with the HDS.

8.Disconnect ECM/PCM connector A (44P).

9.Check for continuity between ELD 3P connector terminal No. 3 and ECM/PCM connector terminal A23.

 

Is there continuity?


YES - Go to 10.


NO - Repair open in the wire between the ECM/PCM (A23) and the ELD, then go to 12.

10.Check for continuity between ELD 3P connector terminal No. 2 and body ground.

 

Is there continuity?


YES - Go to 11.


NO - Repair open in the wire between the ELD and G201, then go to 12.


11.Replace the ELD.

12.Reconnect all connectors.

13.Turn the ignition switch ON (II).

14.Reset the ECM/PCM with the HDS.

15.Do the ECM/PCM idle learn procedure.

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

Is DTC P1298 indicated?


YES - Go to 17.


NO - Troubleshooting is complete.n

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

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

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P1298 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 is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n