DTC Troubleshooting

DTC Troubleshooting: P1298

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. Initial Inspection and Diagnostic Overview

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

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

Is 0.2 A or less 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).

4. Disconnect the ELD 3P connector.

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

6. Measure the voltage between ELD 3P connector terminal No. 1 and body ground.

Is there battery voltage?
YES - Go to step 7.

NO - Check the No. 3 IG1 ACG (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 3 IG1 ACG (15 A) fuse and the ELD, then go to step 12.






7. Jump the SCS line with the HDS.

8. Disconnect PCM connector A (44P).

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

Is there continuity?
YES - Go to step 10.

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






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

Is there continuity?
YES - Go to step 11.

NO - Repair open in the wire between the ELD and G202, Engine Compartment Wire Harness (Left Branch) Connector and Harness Locations then go to step 12.






11. Replace the ELD. Service and Repair

12. Reconnect all connectors.

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

14. Reset the PCM with the HDS.

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

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

Is DTC P1298 indicated?
YES - Go to step 17.

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


17. Update the PCM if it does not have the latest software, PCM Update or substitute a known-good PCM. Initial Inspection and Diagnostic Overview

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

Is DTC P1298 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, Initial Inspection and Diagnostic Overview then recheck. 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 Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.