## DTC Troubleshooting: P1298 (20-2)

DTC P1298 (20-2): | ELD Circuit High Voltage

1. | Reset the ECM/PCM.

2. | Start the engine.

3. | Turn on the headlights. Is DTC P1298 indicated? YES - Go to 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.n

4. | Turn the ignition switch and headlights OFF.

5. | Disconnect the ELD 3P connector.

6. | Turn the ignition switch ON (II).

7. | Measure voltage between body ground and the ELD 3P connector terminal No. 1. Is there battery voltage? YES - Go to 8. NO - Check the No. 3 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 3 (7.5 A) fuse and the ELD.n

8. | Turn the ignition switch OFF.

9. | Connect ELD 3P connector terminal No. 3 and body ground with a jumper wire.

10. | Disconnect ECM/PCM connector E (31P).

11. | Check for continuity between body ground and ECM/PCM connector terminal E15. Is there continuity? YES - Go to 12. NO - Repair open in the wire between the ECM/PCM (E15) and the ELD.n

12. | Check for continuity between ELD 3P connector terminal No. 2 and body ground. Is there continuity? YES - Go to 13. NO - Repair open in the wire between the ELD and G201.n

13. | Reconnect the ELD 3P connector and ECM/PCM connector E (31P).

14. | Start the engine and let it idle.

15. | While measuring voltage between ECM/PCM connector terminals A24 and E15, turn the headlights on (high). Does the voltage drop? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/ PCM.n NO - Replace the engine compartment wire harness.n