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 |
|---|---|---|---|---|
Audio Amplifier B+ | 1 | 1 | -- | -- |
CD Changer B+ | 1, 2 | 1, 2 | -- | -- |
Front Center Speaker Output (+) | 1 | 1 | 1 | -- |
Front Center Speaker Output (-) | 1 | 1 | 1 | -- |
Left Front Midrange Speaker Output (+) | 1 | 1 | 1 | -- |
Left Front Midrange Speaker Output (-) | 1 | 1 | 1 | -- |
Left Front Subwoofer Speaker Output (+) | 1 | 1 | 1 | -- |
Left Front Subwoofer Speaker Output (-) | 1 | 1 | 1 | -- |
Left Seat Speaker Output (+) | 1 | 1 | 1 | -- |
Left Seat Speaker Output (-) | 1 | 1 | 1 | -- |
Right Front Midrange Speaker Output (+) | 1 | 1 | 1 | -- |
Right Front Midrange Speaker Output (-) | 1 | 1 | 1 | -- |
Right Front Subwoofer Speaker Output (+) | 1 | 1 | 1 | -- |
Right Front Subwoofer Speaker Output (-) | 1 | 1 | 1 | -- |
Right Seat Speaker Output (+) | 1 | 1 | 1 | -- |
Right Seat Speaker Output (-) | 1 | 1 | 1 | -- |
Audio Amplifier Ground | -- | 1 | -- | -- |
CD Changer Ground | -- | 1, 2 | -- | -- |
1. Speaker Malfunction 2. Compact Disk Inoperative | ||||
Circuit/System Description
The CD changer is supplied with battery voltage from the RADIO, S-BAND/VCIS fuse located in the body control module (BCM). The radio provides the CD changer with right and left low level audio signal circuits (+) and (-). The audio signal circuits are DC bias voltage circuits that are one half of the battery voltage. When using a DMM, each of the audio signal circuits will measure approximately 6.5V DC. Ground for the CD changer id provided at G104.
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Description and Operation
Radio/Audio System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Radio ON, verify the CD changer operates properly and audio can be heard from the speakers.
| ⇒ | If the CD changer operates properly and audio is inoperative or distorted from one or all of the speakers, refer to Speaker Malfunction . |
Circuit/System Testing
- Ignition OFF, disconnect the X1 harness connector at the CD changer.
- Test for less than 10 ohms between the ground circuit terminal 1 and ground.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 16 and ground.
- If all circuits test normal, replace the CD changer.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
