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Auto Shutdown (ASD) Relay

  1. Remove ASD relay from power distribution center at driver's side front corner of engine compartment, near the battery. Note terminal identification on ASD relay. See Figure .
  2. To check ASD relay resistance, use ohmmeter and check resistance between terminals No. 85 and 86 on ASD relay. Replace ASD relay if resistance is not 70-80 ohms.
  3. To check ASD relay operation, connect ohmmeter between terminals No. 30 and 87A on ASD relay. Ohmmeter should indicate continuity between terminals No. 30 and 87A on ASD relay.
  4. Connect ohmmeter between terminals No. 30 and 87 on ASD relay. See Figure . Ohmmeter should indicate no continuity between terminals No. 30 and 87 on ASD relay.
    5. CAUTION: DO NOT allow ohmmeter leads to contact terminals No. 85 and 86 on ASD relay when ASD relay is energized.
  5. Connect 16-gauge jumper wire between negative battery terminal and terminal No. 85 on ASD relay. Connect 16-gauge jumper wire between positive battery terminal and terminal No. 86 on ASD relay.
  6. ASD relay should now be energized. No continuity should now exist between terminals No. 30 and 87A on ASD relay. Continuity should now exist between terminals No. 30 and 87 on ASD relay. Disconnect jumper wires. Replace ASD relay if defective.
  7. If ASD relay or wiring circuit failure exists, a DTC will be stored in PCM. See DTC P1388: AUTO SHUTDOWN RELAY CONTROL CIRCUIT and/or DTC P1389: NO ASD RELAY OUTPUT VOLTAGE AT PCM test under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - FWD VANS article.
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