Cellular Telephone Microphone Malfunction (without UE1)

Cellular Telephone Microphone Malfunction (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 provide an overview of each diagnostic category.

Circuit/System Description

Without Navigation Radio

The mobile telephone control module uses the cellular telephone microphone to allow driver communication with cellular telephone.

With Navigation Radio

The mobile telephone control module and navigation radio use the cellular telephone microphone to allow driver communication with a cellular telephone, as well as to operate the voice recognition guidance feature of the navigation radio.

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B24 Cellular Telephone Microphone.

2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground.

• If 10 ohms or greater

1. 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

3. Ignition ON.

4. Test for 9-11 V between the signal circuit terminal 3 and ground.

• If greater than 11 V
Replace the K82 Mobile Telephone Control Module.

• If less than 9 V

1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio.

2. Test for infinite resistance between terminal 3 at the B24 Cellular Phone Microphone and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohms in the signal 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 between 9-11 V

5. Replace the B24 Cellular Telephone Microphone.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Mobile Telephone Microphone Replacement Service and Repair

* Control Module References Control Module References for mobile telephone control module or navigation radio replacement, programming and setup.