Contents: Examination ↓ Coolant ↓
Elements of the air conditioning system
- 1. Radiator cooling fan switch N₂ (6-cylinder engine)
- 2. Relay block N1
- Clutch relay (mG CLT marking)
- Heater relay (hTR marking)
- Second cooling fan relay (marking FAN NO.2)
- Third Cooling Fan Relay (marking FAN NO.3)
- 3. Relay block N₂
- Main Engine Relay (eNGINE MAIN marking)
- First Cooling Fan Relay (marking FAN NO.1)
- 4. Refrigerator
- 5. Cooling fan switch (4-cylinder engine)
- 6. Accumulator
- 7. Pressure sensor
- 8. Refrigerator fan
- 9. Compressor
- 10. Radiator cooling fan switch N1 (6-cylinder engine)
As part of maintenance, the following checks must be carried out regularly:
The original can be found on this resource www.ToyotaMAN.ru
- check the condition of the compressor drive belt. Replace the belt if necessary;
- check the belt tension and adjust it if necessary;
- inspect the system hoses for cracks, bulges, and chafed areas. Replace the hoses if necessary;
- inspect the refrigerator fins and clean out any dirt stuck in them;
- check the refrigerant pressure.
Examination
1. Warm up the engine to operating temperature.
2. Set the temperature control knob to the cold air position. Turn on the maximum speed of the blower fan.
3. After the air conditioning system reaches operating temperature, feel the two tubes connected to the refrigerator.

4. The thinner tube should be cold, and the thicker tube should be even colder (approximately –16°C or –12°C).
If the thick tube is much warmer than the thin one, the system needs to be additionally charged with refrigerant. Insert a thermometer into the center of the vent. The temperature of the air coming from the vent should be lower by 3-5°C than the ambient air temperature. If this is not the case, the system needs to be additionally charged with refrigerant; contact a specialist for this.
Coolant
R-134a Recharging Kit

To recharge the air conditioning system with refrigerant, refrigerant R-134a is used. Any car enthusiast can recharge the air conditioning system independently. To do this, you need to purchase a special recharging kit with instructions for its use.

1. Connect the hose to the valve located on the refrigerant pipe (indicated by the arrow).

2. Short-circuit contacts 1 and 4 of the air conditioning pressure sensor using a jumper (indicated by the arrow), to keep the compressor running while you charge the system with refrigerant.
Air conditioning system odors
To remove odors that arise in the air conditioning system, special disinfectants are usually used. And, although the best solution would be to contact a specialized workshop, you can treat the elements of the air conditioning system yourself.

Remove the blower resistor and treat the evaporator with a disinfectant solution.
