B1288

DTC B1288

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 Descriptors

DTC B1288 01
- Video Display Mode Control Signal Short to Battery

DTC B1288 02
- Video Display Mode Control Signal Short to Ground

DTC B1288 04
- Video Display Mode Control Signal Open Circuit

Diagnostic Fault Information






Circuit/System Description

The radio can command the seatback video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio utilizes discreet mode control circuits to each display to control the screen display mode via a pulse width modulated signal. If the display screen does not receive a signal, the display screen will operate in a default full screen mode.

Conditions for Running the DTC

* Ignition ON.

* Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

The radio detects a short to voltage, short to ground, or an open/high resistance in the video display mode control circuit 400 ms after the radio activates the remote enable circuit.

Action Taken When the DTC Sets

The radio sets the DTC and defaults the video display to normal mode.

Conditions for Clearing the DTC

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

* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Video System Schematics Video System Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Video Entertainment System Description and Operation Video Entertainment 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 Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, radio ON, DVD playing.

2. Verify the display mode of the seatback video displays can be controlled using the infrared remote control to change the display mode.

• If the display mode cannot be controlled.
Refer to Circuit/System Testing

• If the display mode can be controlled.

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down

2. Disconnect the harness connector at the appropriate P22 seatback video display.

3. Ignition ON, radio ON, DVD playing.

4. Test for 190-210 HZ DC between the control circuit terminal 15 and ground.

• If not between 190-210 HZ DC.

1. Ignition OFF, disconnect the X2 harness connector at the A11 radio.

2. Ignition ON.

3. Test for less than 1 V between the control circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V

4. Ignition OFF.

5. Test for infinite resistance between the control circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

6. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the A11 radio.

• If between 190-210 HZ DC.

5. Test or replace the P22 driver seatback video display.

Repair Instructions

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

* Video Display Replacement Service and Repair

* Control Module References Control Module References for radio replacement, programming, and setup.