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
Connector End View Reference
Description and Operation
Video Entertainment System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, vehicle in Park. Operate the DVD entertainment system using several known good DVD disks.
- RSE ON and observe the rear DVD screen. Verify the rear video display is operational.
| ⇒ | If the radio does not display the DVD, replace the radio. |
| ⇒ | 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
- Ignition OFF, disconnect the harness connector at the appropriate DVD display.
- Ignition OFF, test for less than 5.0 ohms between the ground circuit terminals listed below and ground.
- Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 8 and ground.
- Ignition ON, test for B+ between the battery positive voltage circuit terminal 7 and ground.
- Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 9, and ground.
- Ignition ON, DVD playing, test for 0.1-3.0 volts between the video mode signal circuit terminal 10, and ground.
- Ignition ON, DVD playing, test for 1-3 volts between the video signal (+) circuit terminal 1, and ground.
- If all circuits test normal, replace the DVD display.
| • | Ground terminal 6 |
| • | Ground terminal 5 (DNU) |
| ⇒ | If greater than specified range, test the ground circuit for an open/high resistance. |
| ⇒ | 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. |
| ⇒ | If less than specified value, test the voltage supply circuit for a short to ground or an open/high resistance. |
| ⇒ | 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. |
| ⇒ | 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. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for radio replacement, setup, and programming |
