• | 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. |
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. |
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.
Radio/Navigation System Schematics
Entertainment/Communication Connector End Views
⇒ | If the radio does not display the DVD, replace the radio. |
⇒ | If the rear video display does not operate normally, refer to circuit testing. |
• | 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. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for radio replacement, setup, and programming |