Pinpoint Test H: Radio Interference

Pinpoint Test






Pinpoint Test H: 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
- In-vehicle entertainment system



PINPOINT TEST H: RADIO INTERFERENCE

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H1 VERIFY THE GENERATOR IS THE SOURCE OF THE 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.

- Start the engine.
- Start and run the engine.
- Tune the audio unit to a station where the interference is present.
- Ignition OFF.
- Disconnect: Generator C102B for 2.3L or C102C for 4.0L.
- Start the engine.
- With the engine running, determine if the interference is still present.
- Is the interference present with the generator disconnected?

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

No
INSTALL a new generator. REFER to Generator - 2.3L Service and Repair or Generator - 4.0L SOHC Service and Repair. TEST the system for normal operation.

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