GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2009 🢒 Sportwagon 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B1287

DTC B1287 RHD

DTC Descriptor

DTC B1287: Radio Mute Circuit

Diagnostic Fault Information

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

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Radio Mute Circuit

B1277 02

B1277 0B

B1277 01

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Circuit/System Description

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.

Conditions for Running the DTC

The radio mute output circuit has a malfunction.

Conditions for Setting the DTC

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.

Action Taken When the DTC Sets
    • The telematics module sets a DTC.
    • The telematics module commands the red LED ON.

Conditions for Clearing the DTC
    • The condition for setting the DTC is no longer present.
    • The history DTC will clear after 50 fault-free ignition cycles.
    • The DTC can be cleared using a scan tool.

Reference Information

Schematic Reference

Telematics Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing .
    •  Connector Repairs .
    •  Testing for Intermittent Conditions and Poor Connections .
    •  Wiring Repairs .

Scan Tool Reference

Control Module References

Circuit/System Testing
  1. Ignition ON, use the scan tool to request DTCs. Verify that DTC B1287 is set as current.
    2. ⇒If DTC B1287 is historical, Clear the DTC.
  2. Check the infotainment unit is functioning correctly.
    3. ⇒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.
    5. ⇒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.
    6. ⇒If the DTC is still current, replace the telematics module.
    ⇒If the DTC is not current, replace the infotainment unit.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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