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 provide 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 | 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 | 2 | 2 | 1 | -- |
Video Low Signal | 1 | 2 | 3 | -- |
DVD Display Ground | -- | 1 | -- | -- |
1. Video Entertainment System Inoperative. 2. Backlight only -- NO image shown. 3. Serious damage to radio can occur. *. Video Brightness can not be adjusted. | ||||
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 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
Scan Tool Reference
Circuit/System Verification
1. Ignition ON, vehicle in Park. Operate the DVD entertainment system using several known good DVD disks.
| ⇒ | If the radio does not display the DVD, replace the radio. |
2. RSE ON, observe the rear DVD screen. Verify the rear video display operates normally.
| ⇒ | If the rear video display does not operate normally, 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 to 8 volts between the video bright control circuit terminal 9, and ground.
- Ignition ON, DVD playing, test for 0.1 to 3.0 volts between the video mode signal circuit terminal 10, and ground.
- Ignition ON, DVD playing, test for 1 to 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 range, 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 range, test the voltage supply circuit for a short to ground or an open/high resistance. |
| ⇒ | 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 control 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 signal 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 control circuit for a short to voltage. If the circuit tests normal, replace the radio. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
