For 1990-2009 cars

### 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 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
DVD Display B+ | 1 | 1 | 1 | --
Radio ON Signal | 1 | 1 | 1 | --
Video Display Brightness Signal | B1289 02 | B1289 04 | B1289 01 | --
Video Display Mode Control | B1288 02 | B1288 04 | B1288 01 | --
Video High Signal | 1 | 1 | 1 | --
Video Low Signal | 1 | 1 | 1 | --
DVD Display Ground | -- | 1 | -- | --
1. Video Entertainment System Inoperative.

### Circuit/System Description

The radio can control the video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with modulated (PWM) signal to the rear entertainment video screen to command the display mode.

### 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 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

#### 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 Testing

1. Ignition OFF, disconnect the harness connector at the rear video display.
2. Ignition ON, test for 100-300 Hz at the control circuit terminal 10.

⇒ | 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.

3. If all circuits test normal, replace the rear 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