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 |
|---|---|---|---|---|
Video Display B+ | 1 | 1 | -- | -- |
Antenna Enable Signal | 1 | 1 | -- | -- |
DVD Video Signal (+) | 3 | 3 | 1 | -- |
DVD Video Signal (-) | 1 | 3 | 4 | -- |
Video Bright Control | 2 | 2 | 2 | -- |
Video Mode Signal | 1 | 1 | 1 | -- |
Video 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/System 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 antenna 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.
Diagnostic Aids
When equipped with the navigation radio movies/pictures will appear on the navigation screen when the vehicle is in PARK (P). The video signals are displayed on the Rear Seat Entertainment (RSE) screen when the vehicle is not in PARK. Verify the DVD system operates properly on the navigation radio display with the vehicle in PARK before diagnosing RSE concerns.
Reference Information
Schematic Reference
Radio/Navigation System Schematics
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 Testing
- Ignition OFF, disconnect the harness connector at the video display.
- Ignition OFF, test for less than 10 ohms between the video display ground circuit terminal 6 and ground.
- Test for less than 10 ohms between the video signal circuit terminal 2 and ground.
- Ignition ON, test for B+ between the voltage supply circuit terminal 7 and ground.
- Radio ON, test for B+ between the enable circuit terminal 8 and ground.
- Radio ON, DVD playing in radio, test for 1-8 volts between the video bright control circuit terminal 9 and ground.
- Test for 0.1-3.0 volts between the video mode signal circuit terminal 10 and ground.
- Test for 1-3 volts between the video signal circuit terminal 1 and ground. The voltage will fluctuate in this range while the DVD is playing.
- If all circuits test normal, replace the video display.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
| ⇒ | If less than the specified value, test the voltage supply circuit for a short to ground or an open/high resistance. |
| ⇒ | If less than the specified value, test the enable circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio. |
| ⇒ | If less then specified range, test the 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 circuit for a short to voltage. If the circuit tests normal, replace the radio. |
| ⇒ | If less then specified range, test the 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 circuit for a short to voltage. If the circuit tests normal, replace the radio. |
| ⇒ | If less then specified range, test the 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 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.
| • | Control Module References for Radio replacement, setup, and programming |
