Schematic Diagrams

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Air Conditioning

1992 Subaru Legacy Air Conditioning A/C Switch and Relay Circuit

The 1992 Subaru Legacy Air Conditioning (A/C) switch turns the A/C system on or off. The operation of the switch is transmitted to the ECU. The A/C cut relay breaks the current flow to the compressor, through the use of an output signal from the ECU, for a certain period of time when a "full-throttle" […]

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2003 Lexus ES300 Power Transistor Circuit

The 2003 Lexus ES300 air conditioning control assembly controls the blower speed by varying the voltage at terminal BLW which applies the base current to the power transistor. The air conditioning control assembly also monitors the power transistor collector voltage at terminal, VM to control blower air volume precisely. The following schematic shows the 2003 […]

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2009 Nissan Sentra Refrigerant Flow Schematic Diagram

The 2009 Nissan Sentra refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank, through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coil is controlled by an externally equalized expansion valve, located inside the evaporator case. The refrigerant system is also protected by […]

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2000 Nissan Pathfinder Heater Circuit Diagram and Air Conditioner Wiring Diagram

The 2000 Nissan Pathfinder Heater and Air Conditioner System flows in the standard pattern, that is, through the compressor, the condenser, the liquid tank, through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coil is controlled by an externally equalized expansion valve, located inside the evaporator case. Under normal operating […]

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2007 Toyota Yaris Blower Motor Circuit and Wiring Diagram

The 2007 Toyota Yaris blower motor system consists of following components: blower motor, heater control (blower switch), heater, battery, alternator, relay and gauge, blower resistor and air conditioning amplifier. When the heater control (blower switch) is set to position 1 or higher, the contact of the HTR relay is closed, current flows to the blower […]

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1996 Volkswagen Cabrio Golf Jetta Air Conditioner – Heater Wiring Diagram and Schematics

The 1996 Volkswagen Golf, Cabio and Jetta Air Conditioner – Heater system uses R-134a refrigerant. Variable displacement compressor increases or decreases pressure as necessary to maintain evaporator temperature near 32°F (0°C). Expansion valve restricts refrigerant flow, causing pressure differential. The A/C pressure switch is a triple-pressure switch, which monitors high side pressure. If pressure decreases […]

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1989 Suzuki Swift GTi Air Conditioner Wiring Diagram and Electrical Schematic

The 1989 Suzuki Swift GTi Air Conditioner system consists of 9 major components, compressor, magnet clutch, condenser, receiver/dryer, dual pressure switch, expansion valve, evaporator, blower motor, and heater core. The compressor compresses gas vaporized in the evaporator and sent it to the condenser where it is changed into liquid refrigerant whose heat of vaporization can […]

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Renault Espace III Wiring Diagram and Electrical System

The following file contains wiring diagram and electrical system description of Renault Espace III series. Herein you will find detail information about battery and headlight, rear/ interior light (rear light, courtesy light and fuses), immobilizer, instrument panel, control signals, wipers, radio (radio diagram, ampli-tuner, dashboard, cassette reader, compact disc reader, infrared receiver), electrical assistance equipment […]

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Schematic Diagram for Electronic Thermostat of Isuzu Trooper Air Conditioning

The Isuzu Trooper (98 – 02) electronic thermostat consists of the thermo sensor (1) and thermostat unit (4) which functions electrically to reduce the noises being generated while the system is in operation. The electronic thermo sensor (1) is mounted at the evaporator core (2) outlet and senses the temperature of the cool air from […]

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Jeep Cherokee’88 Engine Cooling Fan Circuit and Wiring Diagram

The 1988 Jeep Cherokee, Comanche, and Wagoneer 4.0L engine series use an auxiliary fan. The auxiliary fan is controlled by a relay mounted on the left inner fender panel. When coolant temperature is more than 190°F/88°C, the radiator coolant temperature switch closes allowing current from the ignition switch to flow through the fan relay to […]

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