Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .
Scheme 227
Scheme 228
Scheme 229
- Turn the ignition switch to ON (II).
- 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 ECM/PCM.
- Turn the ignition switch to LOCK (0).
- Disconnect the ELD 3P connector.
- Turn the ignition switch to ON (II).
- 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. 22 METER (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 22 METER (7.5 A) fuse and the ELD, then go to step 12 .
- Jump the SCS line with the HDS.
- Disconnect ECM/PCM connector A (49P).
- Check for continuity between ELD 3P connector terminal No. 3 and ECM/PCM connector terminal A24. Is there continuity? YES: Go to step 10 . NO: Repair open in the wire between the ECM/PCM (A24) and the ELD, then go to step 12 .
- 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 G501 (see «CONNECTOR TO FUSE/RELAY BOX INDEX»(ref-320459-S26645189512009071400000) ), then go to step 12 .
- Replace the ELD (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ).
- Reconnect all connectors.
- Turn the ignition switch to ON (II).
- Reset the ECM/PCM with the HDS.
- Do «ECM/PCM IDLE LEARN PROCEDURE»(ref-320447-S03803966382009071400000) .
- Check for Pending or Confirmed DTCs with the HDS. Is DTC P1298 indicated? YES: Go to step 17 . NO: Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
- Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ).
- Check for Pending or Confirmed DTCs with the HDS. Is DTC P1298 indicated? YES: Check for poor connections or loose terminals at the ELD and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO: If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-320426-S21651098282009071400000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.