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Circuit/System Testing

  1. Ignition OFF, disconnect the CRNK relay,
  2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the relay ground circuit terminal 86 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 85 and the ground circuit terminal 86. Turn the ignition switch to the start position. The test lamp should turn ON only when the ignition is held in the start position for a maximum of 10 seconds, and then turn OFF.
    • If the test lamp is always ON, test the control circuit for short to voltage. If the circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the relay.
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