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Circuit/System Testing

  1. Ignition OFF. Disconnect the crank relay. Test for 60-80 ohms between relay terminals 85 and 86.
    • If not within the specified range, replace the crank relay.
  2. Test for less than 1.0 ohm between the relay ground circuit terminal 85 and the negative battery terminal.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition OFF, connect a test lamp between the control circuit terminal 86 and the ground circuit terminal 85. 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.
  4. If all circuits test normal, replace the relay.
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