For 1990-2009 cars

### 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
--- | --- | --- | --- | ---
Accessory Voltage | 1 | 1 | -- | --
Left DVD Audio Signal (+) | 2 | 2 | 2 | --
Right DVD Audio Signal (+) | 3 | 3 | 3 | --
DVD Audio Common Signal (-) | 4 | 4 | 4 | --
Infrared Module Ground | -- | 1 | -- | --
1. Infrared Module Inoperative -- headphones and remote 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.

### Circuit Description

The infrared transmitter module contains infrared transmitters for the wireless headphones and the infrared receiver for the video system remote control. The audio that is sent over the DVD audio signal circuits is a varying AC voltage. The infrared transmitter module processes the signal and transmits the audio signals to the headphones. If the display is in the closed position, the infrared signals will not be available for the operation of the wireless headphones and the remote control.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Video Entertainment System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### 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.

1. Turn ON the wireless headphones. Verify the power indicator lamp on the wireless headphone illuminates.

⇒ | If the power indicator lamp does not illuminate, replace the wireless headphones.

2. With the Radio ON, DVD playing, verify all of the headphones are working properly.

⇒ | 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

1. Ignition OFF, disconnect the harness connector at the infrared transmitter module.
2. Test for less than 5 Ω between the ground circuit terminal 12 and ground.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, test for B+ between the accessory voltage circuit terminal 4 and ground.

⇒ | If less than the specified range, test the accessory voltage circuit for a short to ground or an open/high resistance.

4. DVD playing, test for AC voltage between the following signal circuit terminals listed below and ground.

• | 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.

5. If all circuits test normal, replace the infrared transmitter module.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Rear Seat Audio Control Replacement

• | Control Module References for Radio replacement, setup, and programming