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Circuit/System Testing

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B24 Cellular Phone Microphone.
  2. Ignition OFF, test for less than 10 Ω between outer shield and ground.
    • If greater than the specified range, test the outer shield circuit for an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  3. Ignition OFF, test for less than 10 Ω between low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  4. Ignition ON, test for 9-11 V between the signal circuit terminal 3 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K82 Mobile Telephone Control Module.
  5. If all circuits test normal, replace the B24 Cellular Phone Microphone.
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