22 · Diagnostics

Poor radio reception

Fault diagnosisPoor radio reception

POOR RADIO RECEPTION

When the relevant control is operated, the radio comes on but it cannot be heard properly or crackles, radio station reception is disturbed.

1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
		TEST RESULTS
	Use the Examiner to connect to the radio control unit and check for errors	Move on to Step 2	1. AM/FM aerial connection interrupted because connector incorrectly inserted 2. Aerial impedence defective or interrupted	1. Restore connection from aerial to radio. 2.Move on to Step 2.
2	AERIAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: - the aerial coaxial lead continuity - the correct aerial impedence See E3510 RADIO	Move on to Step 2	Aerial faulty	Replace the aerial Op. 5570T27 AERIAL SUPPORT - R.R
3	RECEPTION AREA CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is not present in areas of poor reception. The reception should improve significantly when the vehicle moves away from such areas. If the reception area is very poorly served, attempts to switch between frequencies may be perceived as pauses	Move on to Step 3	Area with poor reception	Move to an area with the radio reception is good and try FM and non-FM stations
4	CHECK SPEAKER OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the connection between the radio and the speakers is correct See E3510 RADIO	End of diagnosis	1. Discontinuity in the speaker connections 2. Front speakers defective 3. Rear speakers defective	1. Repair the connections 2. Replace the front speakers Op. 5570T90 FRONT SPEAKER (ONE), LEFT OR RIGHT - R.R 3. Replace the rear speakers Op. 5570T96 REAR SIDE SPEAKER (ONE), LEFT OR RIGHT- R.R

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