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
--- | --- | --- | --- | ---
Right Auxiliary Audio Signal | 1 | 1 | 1 | --
Left Auxiliary Audio Signal | 2 | 2 | 2 | --
Auxiliary Audio Common Ground | -- | 1, 2 | -- | --
Auxiliary Video Ground | -- | 3 | -- | --
Auxiliary Video High Signal | 3 | 3 | 3 | --
1. No or distorted right side audio 2. No or distorted left side audio 3. No or distorted video

### Circuit/System Description

The audio/video adaptor allows the connection of audio and video signals from an external device such as a camcorder, video game console or MP3 player to the rear seat entertainment system. The middle jack is for left audio (white), the right jack is for right audio (red), and the left jack is for video (yellow). The system requires standard RCA cables to connect your external device to the RCA jacks. The auxiliary audio and video circuits are connected to the radio.

### Diagnostic Aids

Verify the external audio or video device is operating normally before performing this diagnostic procedure.

### Reference Information

#### Schematic Reference

Video 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 Testing

Important: Verify the DVD player in the radio is operating normally before performing this diagnostic procedure. If there is any problems with operating the DVD player, refer to Symptoms - Entertainment

1. Ignition OFF, disconnect the X3 harness connector at the radio.
2. Ignition ON, test for less then 1 volt between the appropriate signal circuit terminals listed below and ground.

• | Auxiliary audio left signal (+) - terminal 1

• | Auxiliary audio right signal (+) - terminal 2

• | Auxiliary audio drain wire (-) - terminal 9

• | Auxiliary video signal (+) - terminal 8

• | Auxiliary video drain wire (+) - terminal 16

⇒ | If greater then specified range, test the circuit for a short to voltage.

3. Test for infinite resistance between the terminals listed below and ground.

• | Auxiliary audio left signal (+) - terminal 1

• | Auxiliary audio right signal (+) - terminal 2

• | Auxiliary audio drain wire (-) - terminal 9

• | Auxiliary video signal (+) - terminal 8

• | Auxiliary video drain wire (+) - terminal 16

⇒ | If less then the specified value, test the circuit for a short to ground.

4. Test for less then 5 ohm between the terminals on the radio X3 harness connector and the external terminals on the audio/video adaptor listed below:

• | Auxiliary audio left signal (+) - terminal 1 and the inside of the center (white) jack

• | Auxiliary audio right signal (+) - terminal 2 and the inside of the right (red) jack

• | Auxiliary audio drain wire (-) - terminal 9 and the outside of both the center (white), and the right (red) jacks

• | Auxiliary video signal (+) - terminal 8 and the inside of the left (yellow) jack

• | Auxiliary video drain wire (+) - terminal 16 and the outside of the left (yellow) jack

⇒ | If greater then the specified value, test the circuit for an open/high resistance. If the circuit tests normal, replace the adaptor.

5. If all circuits test normal, replace the radio.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Audio/Video Disc Player Adapter Replacement

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