Auto Shutdown Relay Control Circuit (DTC 42)
NOTE:
For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 3.3L
article in ENGINE PERFORMANCE. After each repair, perform TEST VER-2
.
- Using scan tool, erase trouble codes. Actuate Auto Shutdown (ASD) relay. If ASD relay does not make a clicking sound, go to step 4). If ASD relay makes a clicking sound, go to next step.
- At this time, the condition required to set trouble code is not present. AUTO SHUTDOWN RELAY CONTROL CIRCUIT trouble code sets if ASD relay control circuit is not in its proper state when checked by Powertrain Control Module (PCM) during cranking. Possible causes are: open or short in ASD relay control circuit, open or short control circuit wire, open or shorted ignition power feed to relays, or failed control circuit driver in PCM. Go to next step.
- Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, ensure scan tool is still actuating ASD relay. Start engine. Wiggle wiring from ASD relay to PCM. If engine stalls, repair wiring where wiggling caused engine to stall. If engine does not stall, see INACTIVE TROUBLE CODE CONDITION . Test is complete
- If ASD relay does not make a clicking sound in step 1), remove ASD relay. ASD relay is located in power distribution center, near left shock tower. Using scan tool in voltmeter mode, check voltage on ASD relay connector terminal "A" (Dark Blue/White wire). If voltage is less than 10 volts, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. PCM is located under air cleaner. Using scan tool in ohmmeter mode, check resistance of ASD relay connector terminal "C" (Dark Blue/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Dark Blue/Yellow wire. If resistance is more than 5 ohms, go to next step.
- Using an external ohmmeter, check resistance of (Dark Blue/Yellow wire) between ASD relay connector terminal "C" and PCM connector terminal No. 51. If resistance is more than 5 ohms, repair open Dark Blue/Yellow wire. If resistance is less than 5 ohms, replace PCM.