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BELT PULLEYS / GEARS AUTO PARTS: AIR CONDITIONING COMPRESSOR CLUTCH
HOW TO DETECT THE AIR CONDITIONER COMPRESSOR CLUTCH FAILURE
Diagnosis of the part is carried out in several stages. As a first step, you need to check if the clutch activates when the air conditioner is switched on. The diagnosis procedure is dependent on the drive belt length.
If your vehicle uses a long belt to drive auxiliary units, adhere to the following instructions:
If a short drive belt is installed on the car, the procedure is as follows:
You will need a multimeter for a more comprehensive diagnosis. With its help, you should measure resistance between the component terminals and check for breakage in the component winding. Then check if the power is supplied to the part by measuring the voltage between the corresponding terminals of the power supply wire. Next, measure the clearance between the pulley and the pressure plate. It should be 0.35-0.65 mm on the average.
If in your vehicle the thermal protection device is located outside the coil housing, you should inspect its operability too. For this purpose, disconnect the device from the clutch and measure the voltage at its terminals.
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