Nissan Patrol, Ford Maverick

1988-1997 of release

Repair and operation of the car

Nissan Patrol and Ford Maverik
+ Cars of the Nissan Patrol and Ford Maverick series
+ Diagnostics of malfunctions
+ Settings and routine maintenance
+ Engine
- Cooling systems, heating and air conditioning
   Service of a radiator
   Removal, check of functioning and installation of the thermostat
   Removal and installation of the water pump
   Replacement of spherical caps (release traffic jams)
   Service of a driving belt (it) water pump
   Panel and drive of management of a heater and conditioner of air
   Removal and installation of an electric motor of the fan of a heater
   Air conditioning system
+ A power supply system and production of the fulfilled gases
+ Systems of decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Transmission
+ Coupling
+ Brake system
+ Forward and back bridges, running gear and steering
+ Body
+ Onboard electric equipment

Air conditioning system

General information

Air conditioning system serves for cooling and decrease in humidity of air in interior of the car.

The system can be used as separately in warm weather, and together with a heater in cold. In the second case giving in salon of dry warm air is provided that allows to remove quickly condensate from windows.

The evaporator, the condenser, the compressor, receiver/dehumidifier, the broad valve, and also the connecting fittings consisting of tubes and hoses on which pumping of liquid and/or gaseous coolant is carried out are among the main components of the air conditioning system (see an accompanying illustration). A set of various elements of management and sensors serves for stabilization of turns of idling of the engine and for prevention of excessive fluctuations of pressure in system.

1 — - the broad valve
2 — - the compressor
3 — - the evaporator
4 — - lines of a steam phase
5 — - liquid lines
6 — - an observation port
7 — - a receiver/dehumidifier
8 — - the condenser

Coolant begins to boil at very low temperature (-33 °C), obliges allows to keep it under pressure constantly.

Emission of coolant can lead to receiving frostbites and injury of eyes, besides, mixing up with air, coolant forms poisonous and flammable gas.

Along with loss of coolant there is also a loss of oil from the compressor, and therefore, existence on any of sockets of refrigerator lines of traces of oil is a coolant leak sign.

Authors of this manual recommend all works connected with need of a detachment of refrigerator lines to charge to specialists in air conditioning systems.

On a case of performance of the general car repairs connected with need of extraction of the power unit designers provided a possibility of removal of the compressor from the engine without detachment of hoses (length of the last gives a certain degree of freedom of movement of knot) and its fixing in a motive compartment away from a working zone (on a wing mudguard).

Check of level of coolant (system charge level)


  1. Start the engine and for several minutes turn on the conditioner on the maximum cooling.
  1. Watch a coolant stream through an observation port in the top part of a receiver/dehumidifier:
  1. At correct functioning of system glass of an observation port will remain transparent during all operating time of the compressor.
  2. Cyclic turning on shutdowns of the compressor can cause incidental emergence of bubbles, however the continuous puzyreniye of a stream indicates falling of level of a charge of system.
  3. The intensive puzyreniye and foaming speak about very strong falling of level of coolant.
  4. Total absence of bubbles or existence a streak of oil testify to a full discharge of system.

At high temperature of the environment the small puzyreniye of coolant can be observed even at completely loaded system.

  1. If the system needs charging, the car should be driven away in a specialized workshop where its evacuation (production of air), check on leaks and charging is executed.
  2. In order to avoid damage of the compressor do not turn on the conditioner in the presence of signs of falling of level of coolant in system.


Air conditioning system practically does not need regular service besides the listed below procedures.


  1. According to the schedule of routine maintenance of the car carry out greasing of components of system.
  2. Through an observation port in the top part of a receiver/dehumidifier periodically check coolant level. In case of need you make system charging. Need for regular recharge of the air conditioning system is norm and should not cause concerns.
  3. Periodically a state refrigerator lines of air conditioning system on existence of signs of leaks and external damages. Existence on nipple connections of traces of oil is a sign of leak of coolant. Execute necessary repair.
  4. Periodically check a drain tube of the evaporator and section of the heat exchanger through passage of the condenser for existence of signs of blocking. In case of need you make a clearing.
  5. Regularly check a state and effort of a tension of a driving compressor belt.
  6. At all seasons of the year regularly (at least once in a week) start air conditioning system on 10 ÷ 15 minutes for greasing of internal consolidations.