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Testing the Control Module Circuits

  1. Ignition OFF, Ignition OFF and all vehicle systems OFF, all keys at least 3 meters away from vehicle, all access doors closed. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 Ω between the low reference circuit terminal at the control module that was just disconnected and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the appropriate control module.
  2. Ignition ON, test for 4.8-5.2 V between each 5 V reference circuit terminal and ground, at the control module connector that was just disconnected.
    • If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate control module.
    • If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the appropriate control module.
  3. Connect the harness connectors at the control module that was just disconnected.
  4. Repeat step 1 at another control module until a short to voltage, a short to ground, or an open/high resistance is found on the control module circuits.
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