Diagnostic Routine G

Diagnostic Routine G

Diagnostic Overview

Radio Interference

Refer to Wiring Diagram Set 12 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The generator radio suppression equipment reduces interference transmitted through the speakers by the vehicle electrical system.

Visual Inspection and Diagnostic Pre-checks

- Inspect the generator.

- Inspect the in-vehicle entertainment system.

- Inspect the wiring, terminals or connectors.

- Inspect for loose or corroded connections.

Pinpoint Test

NOTE: If the OEM (Original Equipment Manufacturer) audio unit has been replaced with an aftermarket unit, the vehicle may not pass this test. Return the vehicle to OEM (Original Equipment Manufacturer) condition before following this pinpoint test.

NOTE: If the engine is operated at greater than 2,000 RPM (Revolutions Per Minute) momentarily, the generator self-excites. Make sure when the generator is disconnected the engine rpm stays below 2,000 RPM (Revolutions Per Minute). If it does rise above 2,000 RPM (Revolutions Per Minute), turn the ignition to the OFF position and start the test over again.

NOTE: Inspect for any aftermarket accessories that have been added to the vehicle. Check the wiring for these accessories and be sure they have not been attached to the generator circuits and are positioned away from the generator wiring.

1. VERIFY THE GENERATOR IS THE SOURCE OF THE RADIO INTERFERENCE

1. Start the engine and allow the engine to idle.

2. Tune the audio unit to a station where the interference is present.

3. Ignition OFF.

4. Disconnect: Generator C102B.

5. Start the engine and allow the engine to idle.

Is the interference present with the generator disconnected?