TEST RESULTS

Check the condition of the auxiliary drive belt and make sure the tension is correct.

Check whether the noise remains constant when the electrical loads switched on increase

Move on to Step 1

1. Belt worn

2. Tension not correct

3. Noise increases

1. Replace belt

 Op. 1092G10 AUXILIARY COMPONENTS SINGLE DRIVE BELT - R.R.

2. Adjust the belt tension

3. Move on to Step 1

Check that the alternator is working properly, in particular:

- Voltage regulator

- Connections between alternator and battery

Move on to Step 2

1. Voltage regulator defective

2. Connections not correct

1. Replace the voltage regulator

 Op. 5530A10 ALTERNATOR - R.R.

2. Restore the correct connections.

Check whether the noise disappears if the belt is disconnected

Move on to Step 3

1. The noise disappears.

2. The noise remains constant.

1. Move on to Step 3

2. Move on to Step 4

Check the operation of the air conditioning compressor.

Move on to Step 4

Air conditioning compressor faulty.

Repair or replace the compressor

 Op. 5040A20 AIR CONDITIONING COMPRESSOR - R.R. INCLUDES CHECKING FLUID LEVEL AND TOPPING UP IF NECESSARY

Check the condition of the belt tensioner bearings.

End of diagnosis

1. Fixed belt tensioner faulty.

2. Moving belt tensioner faulty.

1. Replace fixed belt tensioner

 Op. 1092G20 ENGINE COMPONENT SINGLE BELT FIXED TENSIONER - R + R

2. Replace moving belt tensioner

 Op. 1092G14 ENGINE COMPONENT SINGLE BELT MOVING TENSIONER - R + R