Bluetooth Malfunction (OnStar)
Bluetooth Malfunction (OnStar)
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
The Bluetooth (R) antenna either internal to or is a small fixed antenna connected directly to the Telematics Communication Interface Control Module and is used to send and receive signals from a Bluetooth (R) enabled cellular phone. The antenna utilizes no cabling and is not external 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 (R) 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 Telematics Communication Interface Control Module to pair to a Bluetooth (R) device.
* Before performing this test, verify compatibility of the cellular phone(s) the customer is attempting to use with the vehicle. Based on the cellular phone's service provider and the manufacturer's implementation of Bluetooth (R), not all phones support all available Bluetooth (R) functionality. A vehicle and feature compatibility list will be provided via the GM Bluetooth (R) website: http://www.onstar.com/web/Bluetooth/
* If the 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 (R) test tool or equivalent can also be used to verify the ability of the customers cellular phone(s) to pair with another device.
Schematic Reference
OnStar Schematics OnStar Schematics
Connector End View Reference
Component Connector End Views Outside Rearview Mirror - Driver
Description and Operation
OnStar Description and Operation OnStar
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
Special Tools
EL-50334-20 - Multi-Media Interface Tester (Multi-Media Interface Tool)
Circuit/System Verification
1. Ignition ON.
2. Verify DTC B2485 is not set.
• If DTC B2485 is set
Refer to DTC B2485 B2485
• If DTC B2485 is not set
Note: The Multi-Media Interface Tool tool can be used to test either cellular phone or streaming audio functions. Refer to the tool instructions, and perform the appropriate test(s) related to the customers concern in the following steps.
3. Ignition ON, infotainment system ON.
4. Verify the infotainment system successfully pairs with the Multi-Media Interface Tool.
• If the infotainment system does not successfully pair with the Multi-Media Interface Tool.
1. Verify the vehicle is equipped with an external Bluetooth(R) Antenna.
• If not equipped with an external Bluetooth(R) Antenna, replace the K73 Telematics Communication Interface Control Module
• If equipped with an external Bluetooth(R) Antenna
2. Replace the Bluetooth(R) Antenna.
3. Verify the infotainment system successfully pairs with the Multi-Media Interface Tool.
• If the infotainment system does not successfully pair with the Multi-Media Interface Tool, replace the K73 Telematics Communication Interface Control Module.
• If the infotainment system successfully pairs with the Multi-Media Interface Tool.
• If the infotainment system successfully pairs with the Multi-Media Interface Tool.
5. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for Telematics Communication Interface Control Module replacement, programming and setup.