B1289
DTC B1289
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 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/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 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 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 brightness of the seatback video displays can be controlled using the infrared remote control to change the display mode.
• If the display brightness cannot be controlled.
Refer to Circuit/System Testing
• If the display brightens 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 connectors at both of the P22 seatback video displays.
3. Test for 190-210 HZ DC between the control circuit terminal 16 and ground at each display.
• 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.
4. Ignition OFF. Connect the harness connector at the P22E driver seatback video display.
5. Ignition ON, radio ON, DVD playing.
6. Test for 190-210 HZ DC between the video brightness control circuit terminal 16 and ground at the P22F passenger seatback video display.
• If not between 190-210 HZ DC.
Test or replace the P22E driver seatback video display
• If between 190-210 HZ DC.
7. Test or replace the P22F passenger 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.