Pinpoint Test G: Radio Interference

Pinpoint Test






Pinpoint Test G: Radio Interference

Refer to Wiring Diagram Set 12, Charging System for schematic and connector information. Diagrams By Number

Normal Operation

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

This pinpoint test is intended to diagnose the following:
- Generator
- Wiring, terminals or connectors
- In-vehicle entertainment system



PINPOINT TEST G: RADIO INTERFERENCE

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

NOTE: If the engine is operated at greater than 2,000 rpm momentarily, the generator will self-excite. Make sure when the generator is disconnected the engine rpm stays below 2,000 rpm. If it does rise above 2,000 rpm, turn the ignition to the off position and start the test over again.

NOTE: Inspect for any after market 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.

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G1 VERIFY THE GENERATOR IS THE SOURCE OF THE RADIO INTERFERENCE


- Start the engine and allow the engine to idle.
- Tune the audio unit to a station where the interference is present.
- Ignition OFF.
- Disconnect: Generator C1104B.
- Start the engine and allow the engine to idle, determine if the interference is still present.
- Is the interference present with the generator disconnected?

Yes
REFER to Accessories and Optional Equipment for diagnosis and testing of the in-vehicle entertainment system.

No
INSTALL a new generator. REFER to Generator - 4.0L SOHC Service and Repair or Generator - 4.6L (2V). TEST the system for normal operation.

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