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Circuit/System Testing

  1. Vehicle OFF, disconnect the harness connector at the S51 telematics button assembly.
  2. Doors closed, courtesy lamps OFF, test for less than 10 Ω between the ground circuit terminal E and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Vehicle in Service Mode, command the green LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal F and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
  4. Command the green LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal F and ground.
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
  5. Command the red LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal G and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
  6. Command the red LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal G and ground.
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
  7. If all circuits test normal, replace the S51 telematics button assembly.
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