| 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 at 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. 16 (7.5A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 16 (7.5A) fuse and the ELD.n |
| 8. | Turn the ignition switch OFF. |
| 9. | Connect the 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. |
| 12. | Check for continuity between the ELD 3P connector terminal No. 2 and body ground.
Is there continuity? YES - Go to 13. NO - Repair open in the wire between 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 ELD.n |