Cellular Telephone Conversation Partner Does Not Hear You (without UE1)
Cellular Telephone Conversation Partner Does Not Hear You (without UE1)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The mobile telephone control module uses the microphone to allow driver communication with the cellular telephone. The cellular telephone is connected to the mobile telephone control module via Bluetooth.
Reference Information
Schematic Reference
Cellular Telephone Schematics Cellular Telephone Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Cellular Telephone Description and Operation Cellular Telephone
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the scan tool Microphone Signal parameter is between 2-5 V.
• If the parameter is not between 2-5 V
Refer to Circuit/System Testing.
• If the parameter is between 2-5 V
3. All OK.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B24 Cellular Phone Microphone.
2. Test for less than 10 ohms between outer shield and ground.
• If 10 ohms or greater
1. Disconnect the X1 harness connector at the K82 mobile Telephone Control Module.
2. Test for less than 2 ohms in the outer shield end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K82 Mobile Telephone Control Module.
• If less than 10 ohms
3. Test for less than 10 ohms between low reference circuit terminal 2 and ground.
• If 10 ohms or greater
1. Disconnect the X1 harness connector at the K82 mobile Telephone Control Module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K82 Mobile Telephone Control Module.
• If less than 10 ohms
4. Ignition ON.
5. Test for 9-11 V between the signal circuit terminal 3 and ground.
• If less than 9-11 V
6. Test for infinite resistance between the signal circuit terminal 3 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K82 Telephone Control Module.
• If greater than 9-11 V
1. Disconnect the X1 harness connector at the K82 Telephone Control Module.
2. Test for less than 1 V between the signal circuit terminal 3 at the B24 Cellular Phone Microphone harness connector and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K82 Telephone Control Module.
• If between 9-11 V
7. Replace the B24 Cellular Phone Microphone.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Control Module References Control Module References for mobile telephone control module replacement, programming and setup.
* Mobile Telephone Microphone Replacement Service and Repair