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Circuit/System Testing

  1. Ignition OFF and vehicle systems OFF, disconnect the X2 harness connector at the K82 Mobile Telephone Control Module, ignition ON.
  2. Test for less than 4 V between the cellular telephone voice signal circuit terminal 6 and ground
    • If 4 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If greater than 1 V, repair the short to voltage in the circuit.
      • If less then 1 V, replace the A11 Radio.
    • If less than 4 V 
  3. Test for less than 4 V between the cellular telephone voice low signal circuit terminal 15 and ground
    • If 4 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If greater than 1 V, repair the short to voltage in the circuit.
      • If less then 1 V, replace the A11 Radio.
    • If less than 4 V 
  4. Ignition OFF.
  5. Test for infinite resistance between the cellular telephone voice signal circuit terminal 6 and ground
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  6. Test for infinite resistance between the cellular telephone voice low signal circuit terminal 15 and ground
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  7. Disconnect the X1 harness connector at the A11 Radio.
  8. Test for less than 2 Ω in the cellular telephone voice signal circuit between A11 Radio terminal 6 X1 and K82 Mobile Telephone Control Module terminal 15 .
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 2 Ω 
  9. Test for less than 2 Ω in the cellular telephone voice low signal circuit between A11 Radio terminal 20 X1 and K82 Mobile Telephone Control Module terminal 15.
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 2 Ω 
  10. Replace the K82 Mobile Telephone Control Module.
  11. Verify that the audio tone can be heard clearly through the audio system when commanding the Audio Tone ON with a scan tool.
    • If audio tone is not heard clearly 

      Replace the A11 Radio.

    • If audio tone is heard clearly 
  12. All OK.
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