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Home >> Dodge and Ram >> 1993 >> Intrepid Base, 3.5 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.3L/3.5L >> Fault Code Tests >> Test FC-39A - Auto Shutdown Relay Control Circuit (DTC 42)
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Test FC-39A - Auto Shutdown Relay Control Circuit (DTC 42)

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. Using DRB-II, erase faults. Actuate Auto Shutdown (ASD) relay. If ASD relay does not make a clicking sound, go to step 6). If ASD relay makes a clicking sound but vehicle will not start and run, go to TEST FC-39B. If ASD relay makes a clicking sound and vehicle will start and run, go to next step.
  2. At this time, the condition required to set fault is not present. AUTO SHUTDOWN RELAY CONTROL CIRCUIT fault sets if ASD and fuel pump 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 and fuel pump relay control circuit, open or short control circuit wire, open or shorted ignition power feed to relays, or failed control circuit driver in PCM.
  3. Inspect wiring and connectors. Repair as required. Perform TEST VER-2. If wiring and connectors are okay, wiggle wiring from relay to PCM.
    NOTE: In order to attempt to reset fault, actuator test must be running for this portion of test.
  4. Using DRB-II, read faults. If ASD relay control circuit fault returns, repair wiring where wiggling caused fault to reappear. Perform TEST VER-2.
  5. If ASD relay control circuit fault does not reappear, see INACTIVE FAULT CONDITION . Perform TEST VER-2.
  6. If ASD relay did not make a clicking sound in step 1), remove ASD relay and substitute another ASD relay. ASD relay is located in power distribution center, near left shock tower. If substitute relay clicks, replace original relay. Perform TEST VER-2. If substitute relay does not click, remove substitute ASD relay. Go to next step.
  7. Place DRB-II in voltmeter mode. Using DRB-II, check voltage of ASD relay connector terminal "A" ignition feed wire (Dark Blue/White wire). If voltage is less than 10 volts, repair open ignition feed wire. Perform TEST VER-2.
  8. If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Remove fuel pump relay. Fuel pump relay is located in power distribution center, near left shock tower. Place DRB-II in voltmeter mode. Using DRB-II, check voltage of ASD relay connector terminal "C" ASD relay control wire (Dark Blue/Yellow wire) at ASD relay.
  9. If resistance is less than 5 ohms, repair ASD relay control wire for short to ground. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  10. Using an external ohmmeter, check resistance of control wire (Dark Blue/Yellow wire) between ASD relay connector terminal "C" and PCM connector terminal No. 51.
  11. If resistance is more than 5 ohms, repair open control wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace ASD relay. Perform TEST VER-2.
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