Circuit/System Testing

Microphone Malfunction

1. Ignition OFF, disconnect the harness connector at the B24 Cellular Phone Microphone, ignition ON.
2. Test for 8.0-10.5 V between the signal circuit terminal A and ground.
   • If less than 8.0 V 
   1. Ignition OFF, disconnect the harness connector at the K82 Mobile Telephone Control Module.
   2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance
   3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the vehicle K82 Mobile Telephone Control Module.
   • If greater than 10.5 V 
   1. Ignition OFF, disconnect the harness connector at the K82 Mobile Telephone Control Module, ignition ON.
   2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K82 Mobile Telephone Control Module.
   • If between 8.0-10.5 V 
3. Test for less than 1 V between the signal circuit terminal B and ground.
   • If greater than 1 V 
   1. Ignition OFF, disconnect the harness connector at the K82 Mobile Telephone Control Module, ignition ON.
   2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, repair the K82 Mobile Telephone Control Module.
   • If less than 1 V 
4. Test for greater than 8 V between the signal circuit terminal A and the signal circuit terminal B.
   • If less than 8 V 
   1. Ignition OFF, disconnect the harness connector at the K82 Mobile Telephone Control Module.
   2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance
   3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the vehicle K82 Mobile Telephone Control Module.
   • If greater than 9 V 
5. Test or replace the B24 Cellular Phone Microphone.

Cellular Telephone Voice Malfunction

1. Ignition OFF and vehicle systems OFF, disconnect the harness connector at the K82 Mobile Telephone Control Module and the X4 harness connector at the A11 Radio, ignition ON.
2. Test for less than 1 V between the signal circuits listed below and ground.
   • K82 Mobile Telephone Control Module signal circuit Terminal 18
   • K82 Mobile Telephone Control Module signal circuit Terminal 17
   • If greater than 1 V 

     Repair the short to voltage in the circuit.

   • If less than 1 V 
3. Ignition OFF.
4. Test for infinite resistance between the between the signal circuits listed below and ground.
   • K82 Mobile Telephone Control Module signal circuit Terminal 18
   • K82 Mobile Telephone Control Module signal circuit Terminal 17
   • If less than infinite resistance 

     Repair the short to ground on the circuit.

   • If infinite resistance 
5. Test for less than 2 Ω in the the signal circuits listed below end to end.
   • K82 Mobile Telephone Control Module signal circuit Terminal 18
   • K82 Mobile Telephone Control Module signal circuit Terminal 17
   • If 2 Ω or greater 

     Repair the open/high resistance in the circuit.

   • If less than 2 Ω 
6. Replace the K82 Mobile Telephone Control Module.
7. Connect the harness connector at the K82 Mobile Telephone Control Module and the X4 harness connector at the A11 Radio, ignition ON.
8. Verify the infotainment system responds correctly to radio voice commands normally.
   • If the infotainment system does not respond correctly to radio voice commands normally 

     Replace the A11 Radio.

   • If the infotainment system responds correctly to radio voice commands normally 
9. All OK.