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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Engine Controls - System/Component Tests - 3.3L (CNG)) >> Relays & Solenoids >> Relays >> Auto Shutdown (ASD) & High Pressure Shutoff Relays

Auto Shutdown (ASD) & High Pressure Shutoff Relays

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relays must be disconnected for testing. Remove relay. Relay terminal numbers are stamped on bottom of relay. See Fig 1 . If any of following resistance and continuity tests fail, replace relay.
  2. Using an ohmmeter, measure resistance between terminals No. 85 and 86. Resistance should be 70-80 ohms. Connect ohmmeter between terminals No. 87A and 30. Continuity should exist. Connect ohmmeter between terminals No. 87 and 30. Continuity should not exist.
  3. Using a pair of jumper wires, connect a jumper wire between terminal No. 85 and battery ground. Connect other jumper wire to battery positive terminal, but DO NOT connect to relay yet.
    CAUTION: DO NOT allow ohmmeter to contact terminal No. 85 or 86 during following test. Damage to ohmmeter may result.
  4. Attach other jumper wire to relay terminal No. 86 to activate relay. Continuity should exist between terminals No. 87 and 30, but not between terminals No. 87A and 30. Disconnect jumper wires from battery and relay.
Fig 1: ASD & High-Pressure Fuel Solenoid Shutoff Relay Terminal ID (All Models)
G92D21694Courtesy of CHRYSLER CORP.
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