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DTC B1265

DTC B1265

Diagnostic Instructions


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

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


DTC Descriptor

DTC B1265 02

Switched 14 Volt Performance Short to Ground

Circuit/System Description

When the radio is on, a discrete 12 V signal is supplied on the entertainment remote enable circuit to the Audio Amplifier and the Seatback Video Displays (if equipped). The signal is used to control the output status of the components

Conditions for Running the DTC


• The radio is ON.

• The system voltage is 9 -16 V


Conditions for Setting the DTC


• The radio detects a short to ground on the entertainment remote enable circuit circuit.

• The above condition is present for greater than 250 mS.


Action Taken When the DTC Sets


• The radio implements a current limiting mode and disables the output on the entertainment remote enable circuit.

• All components connected on the entertainment remote enable circuit will be inoperative.


Conditions for Clearing the DTC


• The condition responsible for setting the DTC no longer exists.

• After the ignition has been OFF for a sufficient amount of time to allow the radio to enter a low power/sleep state, the radio will re-enable the output on the following ignition cycle and the DTC will become history.

• A history DTC clears after 50 malfunction-free ignition cycles.


Diagnostic Aids


• This DTC may be stored as a history DTC without affecting the operation of the radio/infotainment systems.

• The radio's current limiting logic will not re-enable the output on the entertainment remote enable circuit until after the radio performs a full power-down. It may be necessary to wait 5 minutes with the key OFF and retained accessory power OFF for the radio to re-enable this output.


Reference Information

Schematic Reference


• Radio/Navigation System Schematics

• Video System Schematics


Connector End View Reference

Component Connector End Views

Description and Operation

Navigation System Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing


1. Ignition OFF, radio OFF, radio B+ fuse removed, disconnect all of the connectors listed below:

• T3 Audio Amplifier X3

• P22D Driver Seatback Video Display (if equipped)

• P22P Passenger Seatback Video Display (if equipped)

2. Reinstall the radio B+ fuse. Switch on the ignition, switch on the radio and check that a test lamp lights between the entertainment system's remote control activation circuit connections given below and ground:

• T3 Audio Amplifier X3 terminal 8

• P22D Driver Seatback Video Display terminal 2 (if equipped)

• P22P Passenger Seatback Video Display terminal 2 (if equipped)

3. If the test lamp does not illuminate, test the entertainment remote enable circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the A11 radio.

4. Re-connect the harness connectors listed below one at a time. Verify that DTC B1265 does NOT set as current as each component is re-connected.

• T3 Audio Amplifier X3

• P22D Driver Seatback Video Display (if equipped)

• P22P Passenger Seatback Video Display (if equipped)

5. If DTC B1265 sets as current, replace the module/component that was just re-connected.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.


• Video Display Replacement

• Control Module References for radio and amplifier replacement, programming, and setup