DTC P1298: ELD Circuit High Voltage Acura MDX II facelift

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 137

Scheme 138

Scheme 139

1. Start the engine, and let it idle.
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 -Repair an open in the wire between the No. 18 ACG (10 A) fuse in the under-dash fuse/relay box and the ELD, then go to step 13 .
7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector A (49P).
10. Check for continuity between PCM connector terminal A10 and ELD 3P connector terminal No. 3. Is there continuity? YES -Go to step 11. NO -Repair an open in the wire between the PCM (A10) and the ELD, then go to step 13 .
11. Check for continuity between ELD 3P connector terminal No. 2 and body ground. Is there continuity? YES -Go to step 12. NO -Repair an open in the wire between the ELD and G302, then go to step 13 .
12. Replace the left side engine compartment wire harness (see «CONNECTOR TO HARNESS INDEX»(ref-510479-S04421235632012102300000) ).
13. Reconnect all connectors.
14. Turn the ignition switch to ON (II).
15. Reset the PCM with the HDS.
16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
17. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1298 indicated? YES -Go to step 18. NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .
18. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
19. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1298 indicated? YES -Check for poor connections or loose terminals at the ELD unit and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), 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 (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .