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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: Make sure the engine rpm stays below 2, 000 Revolutions Per Minute (RPM) when the generator is disconnected. If it rises above 2, 000 Revolutions Per Minute (RPM) the engine the generator may self-excite. If this occurs, 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. 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 C102A .
    • Disconnect: Generator C102B .
    • Start the engine and allow the engine to idle.

    Is the interference present with the generator disconnected? 

    Yes  REFER to Information and Entertainment Systems - AM FM (with AM/FM), or Information and Entertainment Systems - AM FM CD Sync (with AM/FM CD with Sync), or Information and Entertainment Systems - Sony Audio System (with Sony Sound), or Information and Entertainment Systems - THX Audio System
    (with THX Audio).
    No  INSTALL a new generator. REFER to Generator and Regulator .
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