When measuring the actual temperature drop of the air through the air conditioning system with a thermometer, the fan should be on its lowest setting, because the slower any given mass of air passes across the condenser, the greater the cooling effect. The objective of this procedure is to show you how to check the condition of air conditioning system components.
The heater system consists of a heater core, which is like a small radiator, through which the coolant circulates from the vehicle cooling system. The objective of this procedure is to show you how to check the heater system and hoses.
There are two types of drive belts: V-type and Serpentine type. The objective of this procedure is to show you how to inspect and manually adjust engine accessory drive belts.
Many vehicles require the technician to manually adjust the tension on the belt. Other vehicles have an automatic spring tensioning system. Depending on the system used on the particular vehicle, you should always follow the manufacturer's service instructions. The objective of this procedure is to show you how to remove and replace an engine accessory drive belt.
