GM Service Manual Online
For 1990-2009 cars only

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.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

DVD Display B+

1

1

--

--

Radio ON Signal

1

1

--

--

Video Display Brightness Signal

2

B1289 04

2

--

Video Mode Signal

1

B1288 04

1

--

Video High Signal (+)

3

3

1

--

Video Low Signal (-)

1

3

4

--

DVD Display Ground

--

1

--

--

1. Video Entertainment System Inoperative.

2. Video Brightness can not be adjusted.

3. Backlight only -- NO image shown.

4. Serious damage to radio can occur.

Circuit Description

The rear seat entertainment (RSE) system utilizes the vehicle radio to play DVD movies and transmit video signals to the rear digital video disc (DVD) display. When the radio is turned ON, the DVD display receives a voltage signal from the radio via the entertainment remote enable signal circuit indicating the system status. The video high and low signal circuits are used to transmit the DVD images to the rear DVD display. The video high (+) voltage will vary as the brightness and the speed of the image varies. A typical voltage reading for the video high (+) is 1 to 2.5V at the disconnected at the video display.

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Entertainment/Communication 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

Scan Tool Data List

Circuit/System Verification

  1. Ignition ON, vehicle in Park. Operate the DVD entertainment system using several known good DVD disks.
  2. If the radio does not display the DVD, replace the radio.
  3. RSE ON and observe the rear DVD screen. Verify the rear video display is operational.
  4. If rear video display does not turn ON, refer to Video Entertainment System Inoperative.
    If the rear video display turns ON, but is blank, or the video is poor quality, refer to circuit testing.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate DVD display.
  2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminals listed below and ground.
  3. • Ground terminal 6
    • Ground terminal 5 (DNU)
    If greater than specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 8 and ground.
  5. If less than specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  6. Ignition ON, test for B+ between the battery positive voltage circuit terminal 7 and ground.
  7. If less than specified value, test the voltage supply circuit for a short to ground or an open/high resistance.
  8. Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 9, and ground.
  9. If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio.
    If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  10. Ignition ON, DVD playing, test for 0.1-3.0 volts between the video mode signal circuit terminal 10, and ground.
  11. If greater then specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
    If less then specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  12. Ignition ON, DVD playing, test for 1-3 volts between the video signal (+) circuit terminal 1, and ground.
  13. If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio.
    If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  14. If all circuits test normal, replace the DVD 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