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Circuit/System Testing

  1. Ignition OFF, disconnect the CRNK relay,
  2. Test for 60-90 ohms between terminals 85 and 86 of the CRNK relay.
    • If not within the specified range, replace the CRNK relay.
  3. Probe the relay ground circuit, right rear terminal 86, with a test lamp that is connected to B+. Verify that the test lamp illuminates.
    • If the test lamp does not illuminate, then test the ground circuit for an open/high resistance.
  4. Ignition OFF, connect a test lamp between the control circuit terminal 85 and the ground circuit terminal 86. Turn the ignition to the start position. The test lamp should illuminate only when the ignition is held in the start position.
    • 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.
  5. If all circuits test normal, replace the relay.
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