ASE PS2 Test Preparation Guide: HVAC Heating & A/C System
Major system components: A/C compressor, compressor clutch, orifice tube or expansion valve, condenser, evaporator, accumulator or receiver/drier, low-pressure safety switch, HVAC fan, fan resistor block or blower control module, automatic climate control module, interior air temperature sensor, sunload sensor, refrigerant, refrigerant hoses, fittings and o-ring seals and heater core.
ASE PS2 Test Preparation Guide: Cooling System
The major components in the cooling system are the radiator, radiator cap, coolant reservoir, fan, fan relay, water pump, thermostat, hoses, belts, coolant sensor and antifreeze.
ASE PS2 Test Preparation Guide: Drivetrain Components
The major drivetrain components include the driveshaft, universal joints, differential and axles on rear-wheel drive (RWD) cars and trucks, and the halfshafts, constant velocity joints and hub assemblies on front-wheel drive (FWD) and all-wheel drive (AWD) vehicles, and transfer case on four-wheel drive (4WD) trucks and SUVs.
ASE PS2 Test Preparation Guide: Electrical System
The major components in the electrical system include the battery, starter and alternator. Also included are the battery cables, relays, fuses and bulbs.
ASE PS2 Test Preparation Guide: Exhaust System
The major components in the exhaust system include the exhaust manifold, head pipe, Y-pipe (if used), exhaust pipe, crossover pipe, tailpipe, muffler, resonator, catalytic converter, clamps, hangars and heat shields.
ASE PS2 Test Preparation Guide: Fuel System
The major components in the fuel system include the fuel pump, fuel filter, fuel lines, fuel injectors, fuel pressure regulator, throttle body, fuel tank and gas cap.
ASE PS2 Test Preparation Guide: Gaskets
Engine gaskets include head gaskets, valve cover and pan gaskets, intake and exhaust manifold gaskets, timing cover gaskets, thermostat and throttle body gaskets, valve guide seals, and crankshaft and camshaft seals. Gaskets are sold individually or in sets that include all of the gaskets and seals needed for a particular repair job (such as replacing an intake manifold, timing cover, cylinder head or overhauling the engine).
ASE PS2 Test Preparation Guide: Ignition System
The major components in the ignition system include the spark plugs, spark plug wires (if used), ignition coil(s), ignition module (if used), an ignition pickup (in a distributor) or a crankshaft position sensor, and on older engines, a distributor.
ASE PS2 Test Preparation Guide: Manual Transmission/Transaxle
The major components in a manual transmission or transaxle include the clutch, release bearing, pilot bearing (if used), clutch linkage (hydraulic or cable), gearbox and shift linkage.
Steering Position Sensors: Monitoring The Driver’s Steering Inputs
Sensors are being used to monitor more and more functions, and to share information between vehicle systems that formerly were mute or didn’t communicate with one another. One such sensor is the steering position sensor.