Car air conditioner Mitsubishi Pajero 4

General information
The Mitsubishi Pajero is equipped with a comprehensive heating, ventilation and air conditioning system, which is designed to ventilate and cool the air in the summer,...

Special tool
Tool Name and code MB991367 Special spanner MB991386 Fasteners MB991658 Test Wiring(s) MB991223 Installation wiring MB992006 Sampler M.U.T.-III

Technical specifications
Type of air conditioning system Refrigerant type Amount of refrigerant, g Single air conditioner HFC134a(R134a) 550±20 Dual air conditioner HFC134a(R134a) 870+ 20

Operating principles of the cooling system
The cooling system consists of compressor, evaporator, condenser, dryer, expansion valve, supercharger, control module and other parts. The cooling system works as...

Operating principles of the heating system
The liquid in the engine cooling system is used as a coolant in the heating system. The main components of the system are the heat exchanger, coolant circulation line,...

Air conditioning control system
The air conditioner control system includes a power supply control circuit, a compressor clutch control system, a protection circuit, a data transmission circuit and...

Refrigerant charging
1. Unscrew the handle completely (the valve is closed), install an adaptor valve on the low pressure side of the pressure measuring unit. 2. Connect the filling hose...

Key safety requirements
R-134a refrigerant is a composite chemical compound that includes fluorine, hydrogen, and carbon (R). The chlorine element is replaced by hydrogen, so this compound does...

Diagnosis of system failures
Checking by direct visual inspection and observation In the event of a failure or deviation from the normal functioning of the air conditioning system, certain external...

Air Conditioner Control Panel
Removal the air conditioning control panel 1. Remove the lower center panel assembly (1). 2. Remove the lower center panel (2). 3. Remove the air conditioner control...

Removal the heater and fan unit
1. Drain the coolant. 2. Drain the refrigerant from the system. 3. Remove the floor console assembly. 4. Remove the rear heater air duct. 5. Remove the instrument panel...

Installing the heater and fan unit
1. Install the bracket (13). 2. Install the heater unit assembly (12). 3. Install the drain hose (11). 4. Install the fan assembly (10). 5. Install the cross beam (9)....

Heater unit
Disassembling the heater unit 1. Remove the right heater air duct (1). 2. Remove heater No. 1 (2). 3. Remove the heater fluid temperature sensor clamp (3). 4. Remove the...

Fan unit
Disassembling the fan unit 1. Remove the fan motor (1). 2. Remove the air filter (2). 3. Remove the motor controlling the internal/external air circulation selector flap...

Removal the air conditioning control motors
1. Remove the lower cover from the passenger side. 2. Remove the engine control unit bracket. 3. Remove the fan motor (1). 4. Remove the power transformer (2). 5. Remove...

Installation of air conditioning control motors
1. Install the motor and air mixing flap control potentiometer (5). Note: Make sure that the air mix flap control motor and potentiometer are in the "DEF" position...

Removal air conditioning system sensors
1. Remove the radiator grille. 2. Remove the ambient air temperature sensor (1). 3. Remove the lower cover of the instrument panel. 4. Remove the floor air duct. 5....

Installation of air conditioning system sensors
1. Install the photo sensor (6). 2. Install the center speaker and speaker bracket. 3. Install the cabin air temperature sensor (5). 4. Connect the cabin air temperature...

Rear air conditioning control panel
Removal the rear air conditioning control panel Remove the rear air conditioning control panel. Installing the rear air conditioner control panel Install the rear air...

Removal the rear heater unit
Short wheelbase model 1. Remove the rear heater unit (1). 2. Remove the rear heater bracket B (2). 3. Remove the rear heater bracket A (1).

Installing the rear heater unit
Short wheelbase model 1. Install the rear heater bracket A (1). 2. Install the rear heater bracket B (2). 3. Install the rear heater unit (1).

Disassembling the rear heater unit
Short wheelbase model 1. Remove the rear air intake duct (1). 2. Remove the fan resistor (2). 3. Remove the rear fan motor (3). 4. Remove the fan (4). 5. Remove the...

Assembling the rear heater unit
Short wheelbase model 1. Install the housing (10). 2. Install the floor console heater (9). 3. Install the bracket (8). 4. Install the wiring bracket (7). 5. Install the...

Removal the rear heater and fan assembly
1. Drain the refrigerant from the system. 2. Remove the rear pillar trim. 3. Remove the rear fan assembly (1). 4. Remove the rear mudguards. 5. Remove drain pipe D (2)....

Installing the rear heater and fan assembly
1. Install the rear heater unit (6). 2. Install the engine crankcase guard. 3. Install the heater hose (5). 4. Install the sealing ring (4). 5. Install the suction tube...

Rear heater unit
Disassembling the rear heater unit 1. Remove the air conditioner tube (1). 2. Remove the cover (2). 3. Remove the heater core (3). 4. Remove the connection (4). 5....

Rear fan
Disassembling the rear fan 1. Remove the rear fan resistor (1). 2. Remove the motor and the mode selector flap control potentiometer (2). 3. Remove the electrical wiring...

Removal the compressor
Model with 3800 cc engine 1. Drain the refrigerant from the system. 2. Remove the engine crankcase guard. 3. Remove the battery. 4. Disconnect the flexible suction hose...

Compressor installation
Model with 3800 cc engine 1. Install the air conditioner compressor bracket (6). 2. Install the air conditioner compressor assembly (5). Adjust the oil level in a new...

Checking the operation of the compressor electromagnetic clutch
Connect the positive terminal of the compressor connector directly to the positive (+) terminal of the battery and connect the negative (-) terminal of the battery to...

Disassembling the compressor
1. Unscrew the lock nut (1). 2. Remove the anchor (2). 3. Remove the spring ring (3). 4. Remove the rotor (4). 5. Remove the spring ring (5). 6. Remove the air...

Compressor assembly
Note: Clean the moving surfaces of the pulley and compressor with a clean cloth. Install new retaining rings. Make sure the pulley rotates smoothly after installation....

Removal the capacitor
1. Drain the refrigerant from the system. 2. Remove the radiator grille. 3. Remove the condenser fan assembly (1). 4. Remove the condenser fan motor (2). 5. Remove the...

Installing a capacitor
Note: Install only new O-rings and gaskets. Avoid contact of liquid refrigerant with polished or treated metal surfaces. When refrigerant comes into contact with...

Removal the air conditioning system pipes
Left hand drive model 1. Drain the refrigerant from the system. 2. Remove the battery and battery tray. 3. Remove the radiator expansion tank. 4. Remove the fuel filter...

Installation of air conditioning pipes
Left hand drive model 1. Install the sealing ring (10). 2. Install the air conditioner pressure sensor (9). 3. Install drain pipe A (8). 4. Install the flexible pressure...

Rear air conditioning pipes
Removal the rear air conditioning pipes 1. Drain the refrigerant from the system. Note: Install plugs in the places of removed pipes to prevent water and foreign objects...

Air Ducts (Single Air Conditioner)
Removal air ducts (single air conditioner) 1. Remove the lower instrument panel cover. 2. Remove the floor air duct C (1). 3. Remove the instrument panel. 4. Remove the...

Air ducts (dual air conditioner)
Removal air ducts (dual air conditioner) 1. Remove the rear pillar trim. 2. Remove the air duct from the rack (1). 3. Remove the ceiling lighting. 4. Remove the right...

Ventilation elements
Removal ventilation elements 1. Remove the rear bumper. 2. Remove the rear ventilation duct. Installation of ventilation elements 1. Install the rear air vent. 2....

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Pajero 4 (2006-2021)

Pajero 1 and 2 (1982-1999)