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DTC B1289

DTC B1289

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 Descriptors

DTC B1289 01

Video Display Brightness Control Signal Short to Battery

DTC B1289 02

Video Display Brightness Control Signal Short to Ground

DTC B1289 04

Video Display Brightness Control Signal Open Circuit

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Video Display B+ 2 1 - -
Remote Enable Control Circuit B1265 02, 3 4 5 -
DVD Audio Common Signal (-) 6 6 6 -
Left DVD Audio Signal (+) 7 7 7 -
Right DVD Audio Signal (+) 8 8 8 -
DVD Video Signal (+) 9 9 7 -
DVD Video Signal (-) 9 9 9, 10 -
Infrared Remote Signal (+) 11 11 11 -
Infrared Remote Signal (-) 11 11 11 -
Video Mode Signal B1288 02, 12 B1288 04, 12 B1288 01, 12 -
Video Bright Signal B1289 02, 13 B1289 04, 13 B1289 01, 13 -
Ground Terminal 8 - 1 - -
Ground Terminal 14 - 1 - -
1. One or both seatback displays inoperative 2. Both seatback displays inoperative 3. All infotainment devices controlled by circuit inoperative, no sound from speakers 4. One or more infotainment devices controlled by circuit inoperative 5. Power state of all infotainment devices controlled by circuit cannot be controlled by radio 6. No or distorted audio heard in wireless headphones 7. No or distorted left channel audio heard in wireless headphones 8. No or distorted right channel audio heard in wireless headphones 9. No or distorted image in seatback display 10. Serious damage to radio can occur 11. Infrared remote control inoperative 12. Seatback display mode cannot be controlled/changed 13. Seatback display brightness cannot be controlled/adjusted


Circuit/System Description

The radio can control the seatback video display brightness on vehicles equipped with rear seat entertainment (RSE) video. A single brightness control circuit is used by the radio to control the display screen brightness for both displays via a pulse width modulated signal. If the display screen does not receive a signal, the display screen will operate at default brightness, which is a middle brightness level.

Conditions for Running the DTC


Ignition ON.

Battery voltage must be between 9-16 volts.


Conditions for Setting the DTC

The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display brightness 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 full brightness.

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

Connector End View Reference

Component Connector End Views

Description and Operation

Video Entertainment 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 Verification


1. Ignition ON, Radio ON, DVD playing, use the infrared remote control to change the brightness level of the seatback video displays.

2. If one of both of the seatback video displays brightness level cannot be controlled, refer to Circuit/System Testing.

3. Verify that DTC B1289 is NOT set as current.

4. If DTC B1289 is set as current, refer to Circuit/System Testing.


Circuit/System Testing


1. Ignition OFF, disconnect the harness connectors at both of the P22 seatback video displays.

2. Ignition ON, DVD playing, test for 190-210 HZ DC between the video brightness control circuit terminal 16 and ground at each of the P22 seatback video displays.

3. If not within the specified range, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.

4. Ignition OFF, reconnect the harness connector at the P22E driver seatback video display.

5. Ignition ON, DVD playing, test for 190-210 HZ DC between the video brightness control circuit terminal 16 and ground at the P22F passenger seatback video display.

6. If not within the specified range, replace the P22E driver seatback video display.

7. If all circuits test normal, replace the P22F passenger seatback video display.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Video Display Replacement

Control Module References for Radio replacement, setup, and programming