B1265

DTC B1265

Diagnostic Instructions

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

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

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

DTC Descriptor

DTC B1265 02

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Switched 14 Volt Performance Short to Ground

Circuit/System Description

When the radio is on, or when audio output is needed fro chimes, a discrete 12 V signal is supplied on the entertainment remote enable circuit from the radio to the audio amplifier. This signal is used to control the power state of the amplifier.

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 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 between each test attempt with the key OFF and retained accessory power OFF.

Reference Information

Schematic Reference

Radio/Navigation System Schematics Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views Connector End Views By Name

Description and Operation

Radio/Audio System Description and Operation Radio/Audio System

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Testing

1. Ignition OFF, radio OFF, radio B+ fuse removed, disconnect the X3 connector at the T3 audio amplifier.

2. Reinstall the radio B+ fuse. Ignition ON, radio ON, verify that a test lamp illuminates between the entertainment remote enable circuit Audio Amplifier X3 terminal 13 and ground.

• 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 Radio.

3. If all circuits test normal, replace the T3 audio amplifier.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Programming and Relearning for radio and amplifier replacement, programming, and setup