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 |
|---|---|---|---|---|
Infra Red Module Supply Voltage | 1 | 1 | -- | -- |
Entertainment Remote Enable Signal | 1 | 1 | -- | -- |
Video Display Brightness Signal | 2 | 2 | 2 | -- |
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 vehicles radio to play DVD movies and transmit the 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
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 and observe the rear DVD screen. Verify the rear video display is operational.
| ⇒ | If the rear video display does not operate normally, refer to circuit testing. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the 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 4 and ground.
- Ignition ON, test for B+ between the infra red module supply voltage circuit terminal 15 and ground.
- Ignition ON, DVD playing, test for 1-8 volts between the video bright control circuit terminal 16, and ground.
- Ignition ON, DVD playing, test for 1-3 volts between the video signal (+) circuit terminal 13, and ground.
- If all circuits test normal, replace the DVD display.
| • | Terminal 6 |
| • | Tterminal 14 |
| ⇒ | 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 the circuit tests normal, replace the rear seat audio. |
| ⇒ | 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 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.
| • | Second Seat Audio Control Replacement for rear seat audio RSA replacement |
| • | Control Module References for Radio replacement, setup, and programming |
