Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2005LANCER EVOLUTION L4-2.0L DOHC TURBOREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGDESCRIPTION AND OPERATION
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC Turbo
Heating and Air Conditioning: Description and Operation
2005 Mitsubishi Lancer Evolution L4-2.0L DOHC TurboSECTION Description and Operation
GENERAL DESCRIPTION
The heater system uses a two-way-flow full-air-mix system that features high performance and low operating noise. It includes an independent face air blowing function. In addition, an air purifier has been included. GRS is equipped with a heater. GSR is equipped with an air conditioner.
OPERATION
CONDENSER FAN AND RADIATOR FAN CONTROL
For the operation of each fan, refer to GROUP 14 Diagnosis - Symptom Chart
COMPRESSOR CONTROL
When operating the air conditioning switch
- The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 3.2 °C (37.7 °F) or below.
- The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit.
- When the air thermo sensor is activated, the dual pressure switch is ON, and the ignition switch, blower switch, and air conditioning switch are ON, the A/C compressor clutch relay is energized.
When operating the air outlet selection control knob
- When the air outlet selection control knob is moved to DEFROSTER or DEFROSTER/FOOT position, the defroster switch, which is connected in series to the air conditioning switch, is turned on. Compressor controls other than the above are the same as when operating the air conditioning switch.
The heater system uses a two-way-flow full-air-mix system that features high performance and low operating noise. It includes an independent face air blowing function. In addition, an air purifier has been included. GRS is equipped with a heater. GSR is equipped with an air conditioner.
OPERATION
CONDENSER FAN AND RADIATOR FAN CONTROL
For the operation of each fan, refer to GROUP 14 Diagnosis - Symptom Chart
COMPRESSOR CONTROL
A/C Compressor Clutch Relay On Conditions:
When operating the air conditioning switch
- The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 3.2 °C (37.7 °F) or below.
- The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit.
- When the air thermo sensor is activated, the dual pressure switch is ON, and the ignition switch, blower switch, and air conditioning switch are ON, the A/C compressor clutch relay is energized.
When operating the air outlet selection control knob
- When the air outlet selection control knob is moved to DEFROSTER or DEFROSTER/FOOT position, the defroster switch, which is connected in series to the air conditioning switch, is turned on. Compressor controls other than the above are the same as when operating the air conditioning switch.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.