For 1990-2009 cars

### Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Entertainment/Communication Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Scan Tool Data List

### Circuit/System Testing

Important: Verify the auxiliary audio or video input device is operating normally before performing this diagnostic.

#### Auxiliary Video Inoperative or Degraded

1. Test for an open, short to ground or short to B+ on the axiliary video high signal and drain wire.

⇒ | If all circuits test normal, replace the audio/video adapter.

#### Auxiliary Audio Inoperative or Degraded -- Left or Right Channel

1. Install the left and right audio inputs into the audio/video adapter. Operate the auxiliary device audio and note the malfunctioning channel (left or right). Swap the left and right auxiliary audio inputs and verify that the original malfunction is still present.

⇒ | If the malfunction now appears on the opposite audio channel, the auxiliary audio device is not operating normally.

2. Test the suspect auxiliary audio signal circuit and drain wire for a open, short to ground or short to B+.

⇒ | If all circuits test normal replace the audio/video adapter.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Auxiliary Audio/Video Input Control Replacement