Pinpoint Test G: Radio Interference

WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the OEM ACM 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 self-excites. 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 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.

G1 VERIFY THE GENERATOR IS THE SOURCE OF THE RADIO INTERFERENCE
- Start the engine and allow the engine to idle.
- Tune the ACM to a station where the interference is present.
- Ignition OFF.
- Disconnect: Generator C102B .
- Start the engine and allow the engine to idle.
Is the interference present with the generator disconnected?
- Yes : Refer to the appropriate article for the procedure. Refer to DIAGNOSIS AND TESTING of the In-Vehicle Entertainment System.
- No : INSTALL a new generator. REFER to GENERATOR - 3.5L GTDI , GENERATOR - 3.7L , GENERATOR - 5.0L or GENERATOR - 6.2L . TEST the system for normal operation.