Chevrolet Silverado / GMC Sierra. Service manual — part 2222

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

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

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 Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Video Display Replacement (Second Row)

Control Module References for Radio replacement, setup, and programming

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

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Circuit/System Description

The radio can control the video display brightness 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 screen brightness to the desired 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

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
Control

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.

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

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 9.

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 Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Video Display Replacement (Second Row)

Control Module References for Radio replacement, setup, and programming

DTC B2455

Diagnostic Instructions

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado