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Test TC-10A - Auto Shutdown Relay Control Circuit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
  1. Using scan tool, actuate Auto Shutdown (ASD) relay. Listen for clicking sound at ASD relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment, near battery. See Fig 1.
    Fig 1: Locating ASD Relay & Identifying Power Distribution Center Cavities
    G95E35042
  2. If no clicking sound is heard at ASD relay, go to step  7. If clicking sound is heard at ASD relay, conditions required to set DTC are not present at this time.
  3. The ASD relay provides voltage to fuel injectors, ignition coil(s), oxygen sensors and generator. DTC may be stored in Powertrain Control Module (PCM) if an open or shorted condition is detected in the ASD relay control circuit. Possible causes are: ASD relay coils open or shorted, open circuit on fused ignition circuit to ASD relay, ASD control circuit open or shorted, inoperative circuit driver in PCM, defective PCM, defective connector terminals or wiring. Go to next step.
  4. Check for defective wiring or connections at ASD relay and PCM. The PCM is located between driver's side front fender and power distribution center, near battery.
  5. If defective wiring or connections exist, repair as necessary. Perform TEST VER-2A - ROAD TEST VERIFICATION . If no defective wiring or connections exist, start engine. Wiggle wiring harness from ASD relay to the PCM.
  6. If engine stalls while wiggling the wiring harness, repair wiring as necessary. Perform TEST VER-2A - ROAD TEST VERIFICATION . If engine does not stall while wiggling the wiring harness, see INACTIVE TROUBLE CODE CONDITION . Perform TEST VER-2A - ROAD TEST VERIFICATION .
  7. Remove ASD relay from power distribution center. See Fig 1. Using voltmeter, check voltage at cavity "A" B+ circuit (Red wire) in power distribution center. See Fig 1.
  8. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in B+ circuit (Red wire) to ASD relay. Perform TEST VER-2A - ROAD TEST VERIFICATION .
  9. Using ohmmeter, check resistance between terminals No. 85 and 86 on ASD relay. See Fig 1. If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace ASD relay. Perform TEST VER-2A - ROAD TEST VERIFICATION .
    Fig 2: Identifying ASD Relay Terminals
    G95G35044
  10. Ensure ignition is off. Disconnect connectors from Powertrain Control Module (PCM). The PCM is located between driver's side front fender and power distribution center, near battery.
  11. Using ohmmeter, check resistance between ground and PCM connector terminal No. 67 (Dark Blue/Yellow wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair ASD relay control circuit for short to ground in Dark Blue/Yellow wire between PCM and ASD relay. Perform TEST VER-2A - ROAD TEST VERIFICATION .
  12. Using ohmmeter, check resistance between cavity "C" (Dark Blue/Yellow wire) for ASD relay on power distribution center and PCM connector terminal No. 67 (Dark Blue/Yellow wire). See Fig 1.
  13. If resistance is 5 ohms or more, repair open circuit in Dark Blue/Yellow wire between PCM and ASD relay. Perform TEST VER-2A - ROAD TEST VERIFICATION . If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A - ROAD TEST VERIFICATION .
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