Service Information

Cruze

Bluetooth Microphone Malfunction -- Holden Genuine Accessory

Diagnostic Instructions

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

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Switch Signal	1, 2	1, 2	1, 2	--
Microphone Signal (+)	2, 3	2, 3	2, 3	--
Microphone Signal (-)	2, 3	2, 3	2, 3	--
1. Bluetooth Communication Inoperative. 2. Bluetooth Communication Malfunction. 3. Person called can clearly be heard but the person called is unable to hear the caller.

The Bluetooth Module is a mobile device that is powered by battery positive voltage and ground from a break-out harness connected to the radio connector; and Ignition I voltage from a mini fuse adaptor connected to the terminal connection of fuse F6DA at the instrument cluster fuse box. It allows a cordless link between a mobile telephone and the vehicle Bluetooth communication system. The Bluetooth Module is not connected to the GMLAN system. It communicates with the mobile telephone via low-power radio waves. Due to the low power of the signal, about 1 milliwatt, a mobile telephone must be within 10 metres (32 feet) of the vehicle Bluetooth module to connect an operate.

Reference Information

Schematic Reference

Cellular Telephone Schematics

Connector End View Reference

•	Component Connector End Views

•	Inline Harness Connector End Views

Description and Operation

Bluetooth Communication Description and Operation : Holden Genuine Accessory

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Circuit/System Verification

Note: Perform this diagnostic if the person called can clearly be heard but the person called is unable to hear the caller.

Ignition ON, press Bluetooth switch and make a phone call. Verify that your voice cannot be heard clearly by the person called.

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the Bluetooth Microphone.
Test for less than 1.0 Ω between the low reference circuit terminal 1 and ground.

⇒	If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the Bluetooth module.

Ignition ON, test for 8.0-8.5 V between the signal circuit terminal 2 and ground.

⇒	If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the Bluetooth module.

⇒	If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the Bluetooth module.

Component Testing

Bluetooth Microphone Tests

Ignition OFF, disconnect the harness connector at the Bluetooth switch.
Test for 5.4-6.2 kΩ between terminals 2 and 1.

⇒	If the resistance is not within the specified range, replace the Bluetooth microphone assembly.

Repair Instructions

For component removal and installation refer to the Accessory Fitting Instructions. Perform the Diagnostic Repair Verification after completing the diagnostic procedure.