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 |
|---|---|---|---|---|
Infra Red Module Control | 1 | 1 | -- | -- |
Left DVD Audio Signal (+) | 2 | 2 | 2 | -- |
Right DVD Audio Signal (+) | 3 | 3 | 3 | -- |
DVD Audio Common Signal (-) | 4 | 4 | 4 | -- |
Left Infra Red Audio Signal (+) | 5 | 5 | 5 | -- |
Right Infra Red Audio Signal (+) | 6 | 6 | 6 | -- |
Infra Red Audio Low Reference (+) | 7 | 7 | 7 | -- |
Infra Red Module Ground | -- | 1 | -- | -- |
1. Infra Red Module Inoperative -- headphones inoperative. 2. No or distorted left audio when listening to DVD. 3. No or distorted right audio when listening to DVD. 4. No or distorted audio on both channels when listening to DVD. 5. No or distorted left audio when listening to rear seat audio. 6. No or distorted right audio when listening to rear seat audio. 7. No or distorted audio on both channels when listening to rear seat audio. | ||||
Circuit Description
The infrared transmitter is grounded and powered by the rear seat audio (RSA) module. When listening to the headphones, the infrared transmitter sends an infrared signal to the headphones. There are two channels on the headphones, channel 1 is dedicated to the video screen, and channel 2 is dedicated to the rear seat audio (RSA). The audio that is sent over the DVD and rear seat audio signal circuits is a varying AC voltage.
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
Note: Test or replace the headphone batteries before performing the circuit/system verification.
- Turn ON the wireless headphones. Verify the power indicator lamp on the wireless headphone illuminates.
- With the Radio ON, RSA ON, and DVD playing, verify all of the headphones are working properly.
| ⇒ | If the power indicator lamp does not illuminate, replace the wireless headphones. |
| ⇒ | If all of the headphones are inoperative, or the sound is distorted, refer to Circuit/System Testing. |
| ⇒ | If only one of the headphones is not producing sound, or the sound is distorted, replace the appropriate set of headphones. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the infrared transmitter.
- Test for less than 5.0 ohms between the ground circuit terminal 12 and ground.
- Ignition ON, DVD playing, test for B+ between the infra red module control circuit terminal 4 and ground.
- Ignition ON, DVD playing, test for AC voltage between the following signal circuit terminals listed below and ground.
- Ignition ON, RSA ON, test for AC voltage between the following signal circuit terminals listed below and ground.
- If all circuits test normal, test or replace the infrared transmitter.
| ⇒ | If greater than specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If less than specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear seat audio module. |
| • | Left DVD audio signal (+) - terminal 1 |
| • | DVD audio common (-) - terminal 2 |
| • | Right DVD audio signal (+) - terminal 3 |
| ⇒ | If AC voltage is not present, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio. |
| • | Left infra red audio signal (+) - terminal 9 |
| • | Infra red audio low reference (-) - terminal 10 |
| • | Right infra red audio signal (+) - terminal 11 |
| ⇒ | If AC voltage is not present, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the RSA. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for radio and RSA replacement, setup, and programming |
