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Bluetooth Malfunction

Bluetooth Malfunction

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


Circuit/System Description

The Bluetooth antenna is a small fixed antenna connected directly to the mobile telephone control module and is used to send and receive signals from a Bluetooth enabled cellular phone. The antenna is internal to the vehicle.

In order to use hands-free calling, the cellular phone must be paired to the vehicle. Up to five devices can be paired to the vehicle at one time, but only one can be connected at any given time. To pair a phone, the customer must know how to operate the Bluetooth functionality of their phone. The pairing process must only be done one time for each phone, unless that phone's information is deleted. For safety reasons, the pairing process is disabled while the vehicle is moving.

Diagnostic Aids


• The purpose of this diagnostic is to verify the ability of the mobile telephone control module to pair to a Bluetooth device.

• If a vehicle passes the following tests and a compatible device is being used, the concern may be due to a device malfunction or an incomplete/improper pairing attempt.

• A Bluetooth test tool or equivalent can also be used to verify the ability of the customers cellular phone(s) to pair with another device.


Reference Information

Schematic Reference

Cellular Telephone Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Cellular Telephone Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Verify DTC B2485 is not set.

2. If DTC B2485 is set, refer to DTC B2485 .

3. Set up a Bluetooth test tool or equivalent.

4. Ignition ON, perform the discovery/search operation of the test tool. Verify the vehicle appears in the list of available devices.

5. If the vehicle is not in the list of available devices, repeat the discovery/search operation. if the vehicle is still not in the list of available devices, replace the K82 Mobile Telephone Control Module.

6. Follow the instructions provided in the Vehicle Owners Manual for pairing a device. Verify successful pairing with the test tool.

7. If pairing is not successful, repeat the pairing process. If pairing is still not successful, replace the K82 Mobile Telephone Control Module.

8. Refer to Diagnostic Aids.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for mobile telephone control module replacement, setup and programming