For 1990-2009 cars only
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. |
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Important: Noise compensated volume only available on vehicles equipped with Y91 or UQS.
- Turn the ignition ON. Disconnect the noise compensation microphone.
- Measure for 7-9 volts between the noise compensation microphone supply circuit terminal A and the drain circuit terminal B.
- If all circuits test normal, replace the noise compensation microphone.
| ⇒ | If the voltage is less than the specified range, test the circuits for a short to ground, or an open/high resistance. If the circuit tests normal, replace the auido amplifier. |
| ⇒ | If the voltage is greater than the specified range, test the circuits for a short to voltage. If the circuit tests normal, replace the audio amplifier. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for radio replacement, setup, and programming
