		Test results
1	RADIO CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Release the radio from the dashboard and check that the connections are correctly fitted	Move on to Step 2	1. Connections not correctly fitted 2. Speaker wiring interrupted/short circuited	1. Refit connections properly 2. Repair wiring See E3510 RADIO
2	ELECTRICAL CONNECTION CHECK	All OK	Problems encountered	Operation
	Release the radio from the dashboard and check that it is receiving the correct power supply See E3510 RADIO	Move on to Step 3	1. Positive ignition-controlled power supply interrupted 2. +30 power supply from body computer interrupted 3. Earth power interrupted	1. Restore +15 power supply 2. Restore +30 power supply 3. Restore earth connection
3	AUDIO CONTROLS ON STEERING WHEEL CHECK	All OK	Problems encountered	Operation
	Check that the audio controls on the steering wheel are working properly (if fitted) See E3510 RADIO	Move on to Step 4	Controls on steering wheel defective	Repair/replace the controls on the steering wheel
4	AUDIO SIGNALS CHECK	All OK	Problems encountered	Operation
	Check for audio signals at the radio final output stage See Test 5570TL CHECK ON AUDIO SIGNALS LEAVING RADIO	End of diagnosis	Audio signals at radio output interrupted through final audio stage interrupted	Replace the radio Op. 5570T80 CAR RADIO EQUIPMENT - R+R

Audio not present from all sources (radio, CD, phone)