Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
Scheme 158
- Turn the ignition switch ON (II).
- Check the ELD in the DATA LIST with the HDS. Is 72 A or more indicated? YES- Go to step 3 . NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
- Turn the ignition switch OFF.
- Disconnect the ELD 3P connector.
- Turn the ignition switch ON (II).
- Check the ELD in the DATA LIST with the HDS. Is 72 A or more indicated? YES- Go to step 7 . NO- Go to step 11 .
- Turn the ignition switch OFF.
- Jump the SCS line with the HDS.
- Disconnect ECM/PCM connector E (31P).
- Check for continuity between ECM/PCM connector terminal E15 and body ground. Is there continuity? YES- Repair short in the wire between the ECM/PCM (E15) and the ELD, then go to step 13 . NO- Go to step 20 .
- Turn the ignition switch OFF.
- Replace the under-hood fuse/relay box (see «COMPONENT LOCATION INDEX»(ref-220623-S27883028992006022100000) ).
- Reconnect all connectors.
- Turn the ignition switch ON (II).
- Reset the ECM/PCM with the HDS.
- Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220572-S08440202922006022000000) ).
- Start the engine.
- Turn on the headlights.
- Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting . NO- Troubleshooting is complete.
- Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ).
- Start the engine.
- Turn on the headlights.
- Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES- If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO- If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).