For 1990-2009 cars

## 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
--- | --- | --- | --- | ---
Bluetooth Switch Signal | 1, 2 | 1, 2 | 1, 2 | --
Bluetooth Module Microphone Signal (+) | 2, 3 | 2, 3 | 2, 3 | --
Bluetooth Module Microphone Signal (1) | 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.

### Circuit/System Description

The Bluetooth Module is a cellular device that is powered by battery positive voltage, Ignition I voltage and ground from a patch harness connected between the radio connectors. It allows a cordless link between a cellular telephone and the vehicle Bluetooth communication system. The Bluetooth Module is not connected to the GMLAN system. It communicates with the cellular telephone via low-power radio waves. Due to the low power of the signal, approximately 1 milliwatt, a cellular telephone must be within 10 meters (32 feet) of the vehicle's Bluetooth module to connect an operate.

### Reference Information

#### Schematic Reference

Bluetooth Communication Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Bluetooth Communication Description and Operation

#### Component View Reference

Bluetooth Communication Component Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

### Circuit/System Verification

Important: 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 button and make a phone call. Verify that your voice cannot be heard clearly by the person called.

### Circuit/System Testing

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

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

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

⇒ | If greater than the specified range, test the signal circuit for a short to voltage.

⇒ | 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

1. Ignition OFF, disconnect the connector at the Bluetooth switch.
2. Test for 5.4-6.2 k/Ohms 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.