DTC B1287 RHD

Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information, prior to using this diagnostic procedure.

The telematics module is connected to the drivers side radio speaker via an internal relay. When the Emergency, Holden Assist or Information/End Call button is pressed, the telematics module sends a signal to the infotainment unit via the auxiliary Infotainment unit inputs selected with the aid of the radio mute line. The Infotainment unit will then mute the radio and allow only the telematics audio and tones to sound through the speaker.

The radio mute output circuit has a malfunction.

This code shall set as current when the telematics module detects the radio mute output circuit is short to ground, battery or is over loaded.

Schematic Reference

Telematics Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Scan Tool Reference

Control Module References

1. Ignition ON, use the scan tool to request DTCs. Verify that DTC B1287 is set as current.

⇒	If DTC B1287 is historical, Clear the DTC.

2. Check the infotainment unit is functioning correctly.

⇒	If the infotainment unit is not functioning correctly, refer to infotainment unit system diagnostics.

3. Ignition OFF, disconnect the harness connector at the telematics module.
4. Test the radio mute circuit for short to ground, short to voltage or an open/high resistance.

⇒	If all circuits do not test normal, repair or replace the affected circuit(s).

Important: Other infotainment related DTC's will set when the infotainment unit is disconnected.

5. Disconnect the Infotainment unit.

⇒	If the DTC is still current, replace the telematics module.

⇒	If the DTC is not current, replace the infotainment unit.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the infotainment unit and telematics module replacement, setup and programming.