B1288

DTC B1288

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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

Diagnostic Fault Information






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

The following are conditions that must be present in order for the radio to enable the diagnostics.

* The radio is in ACCESSORY, RUN, or RAP power mode.
* The system voltage is at least 9 volts and no more than 16 volts.

Conditions for Setting the DTC

Circuit failure 400 ms after radio activates Remote Enable.

Action Taken When the DTC Sets

Radio sets the DTC and defaults the video display to Normal mode.

Conditions for Clearing the DTC

* The condition must be corrected.
* A history DTC clears after 100 malfunction-free ignition cycles.
* The radio receives the clear code command from the scan tool.

Circuit/System Verification

Verify the video will change display.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the rear video display. Ignition ON, with a DMM verify there is 100 to 300 Hz on the video display mode control signal circuit.

• If 100 to 300 Hz is not present on the video display mode signal circuit test for an open, a short to voltage, or a short to ground. If the video display mode signal circuit tests normal, replace the radio.

2. If 100 to 300 Hz is present and the video display mode signal circuit tests normal, replace the rear video display.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Programming and Relearning for radio setup, and programming. Programming and Relearning