Nissan Maxima QX

since 1993 of release

Repair and car operation



Nissan Maxima QX
+ Nissan Maxima brand Cars
+ Maintenance instruction
+ Settings and routine maintenance
+ Engine
- Systems of cooling, heating
   General information
   Antifreeze - general information
   Check of serviceability of functioning and thermostat replacement
   Check of a condition of fans of system of cooling and chains of their inclusion, replacement of components
   Removal and installation of a radiator and expanded tank of system of cooling
   Check of a condition and replacement of the water pump
   Check of serviceability of functioning and replacement of the block of the sensor of a measuring instrument of temperature of cooling liquid
   Check of serviceability of functioning of the driving electromotor of the fan of a heater and condition of components of its electric chain, …
   Removal and installation of the electromotor of a drive of the fan of a heater
   Removal and installation of assembly of the control panel by functioning of a heater and air conditioner, adjustment of a driving cable
   Removal and installation of the heat exchanger of a heater
   Check of serviceability of functioning and service of systems of heating and air conditioning
   Removal and receiver dehumidifier installation To/in
   Removal, service and To/in compressor installation
   Removal and To/in condenser installation
+ Power supply system and release
+ engine Electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Check of serviceability of functioning and service of systems of heating and air conditioning

Central air

Air central air constantly is under a high pressure. At all do not disconnect refrigerator lines and do not remove any components of system, previously without having executed a discharge of the last. The discharge of central air of air should be made by strengths of the skilled expert in the conditions of a car-care center workshop. At a rassoyedineniye of refrigerator lines surely put on goggles!

At replacement of components of central air of air the certain amount of replaceable refrigerator oil necessary for filling of volume of new knot is required. Use only the oil good for the use in R-134a systems (attentively study a label on the container). Remember that the epiploons intended for use in systems, filled by R-12 oil, in this case do not approach.

Service

 PERFORMANCE ORDER

1. The control checks listed below should be made on a regular basis for the purpose of maintenance of central air of air in good repair:

a) Check a condition of a belt of a drive of the compressor. In case of detection of defects or signs of wear make replacement (see. Head of Control and routine maintenance);
b) Check effort of a tension of a driving belt, in case of need make the corresponding adjustment (see. Head of Control and routine maintenance);
c) Check hoses of a refrigerator path on existence of cracks, swellings, signs of hardening and rubber aging, estimate a condition of shtutserny connections. Defective components replace;
d) Check plates of the heat exchanger of the condenser on existence of the remains which have got stuck between them of insects, old leaves and other garbage. In case of need clean gaps a thin brush, or blow them the compressed air;
e) Check level of a charge of system;
f) At existence потеков liquids around the dashboard, or on rugs check passableness of a drainage tube of the evaporator.

2. Central air of air should join at least for 10 minutes not less often than once a month (even in a winter season). Long inaction To/in leads to hardening and failure of sealing rings and cuffs of a connecting path.
3. In view of complexity of a design of system and need of use of the special equipment, its service, deep diagnostics and regenerative repair lie outside the limits of qualification of the average amateur mechanic and should be made in the conditions of a car-care center workshop. The elementary checks only listed below in the present Section get to competence of the owner of the car and replacements.
4. The most typical cause of infringement of serviceability of functioning To/in is decrease in level of a charge of refrigerator oil.
5. The elementary checks given below will allow to reveal signs of decrease in level of a coolant quickly.

CHECK

 PERFORMANCE ORDER

1. Warm up the engine to normal working temperature.
2. Include To/in on the maximum hladoproizvoditelnost. Choose the maximum high-speed mode of the fan. Open doors to avoid cyclic shutdowns of system when cooling the air volume closed in salon.
3. After the temperature of system will reach working value, feel two connected to the evaporator on a partition of an impellent compartment of a tube.

4. Thinner tube going to the evaporator from the target union of the condenser should be to the touch rather cold. The tube is thicker, going from the final union of the evaporator back to the compressor, should be a little more (on 2-6 degrees) more cold. If the final tube is to the touch much warmer inlet, therefore, the system needs additional charge. Enter the thermometer into a target air line via the central deflector on the dashboard. At included To/in temperature of air leaving the deflector should be lower on 19-22 degrees than ambient temperature (up to value 4.5°С). In very hot weather (+40°С), increase of target temperature to level of 15.7 °C, but is admissible no more. If the conditioner does not provide demanded intensity of cooling of air, it is necessary to make system additional charge. For more detailed diagnostics of a condition of system the car should be driven away in a specialized workshop.

5. If intensity of cooling of air submitted to salon is insufficient, the system, possibly, needs additional charge.
6. In the presence of signs of a system crash check serviceability of functioning of coupling of the compressor.
7. Watching the forward party of the compressor, ask the assistant to include To / Century the coupling of coupling should publish distinct click, and its central part - to start to rotate, otherwise muffle the engine and disconnect the sensor switch of pressure of system. A wire crossing point close among themselves plugs of the socket and again turn on the conditioner. If now the system starts to function regularly, therefore pressure in it is excessively high or low, - drive away the car on car repair shop.
8. If the coupling still does not work, check a condition of the corresponding safety locks in located in car salon the assembly block.
9. Take from the assembly block of the relay of coupling of the compressor located in an impellent compartment and check serviceability of its functioning (see. Head Onboard electric equipment). At the removed relay and the included ignition check serviceability of giving of a food on two plugs of the relay in the assembly block (see schemes of electric connections at the end of Head Onboard electric equipment).
10. By means of a wire crossing point connect the power plug of the relay of coupling of the compressor in the assembly block (see schemes of electric connections) to the corresponding plug of coupling - the coupling should publish click. If click is not present, disconnect from coupling electroconducting and check serviceability of giving of a food on its socket. Check serviceability of grounding of the plug of a black wire of the socket. If electroconducting as it should be, it is necessary to replace assembly of coupling of the compressor.
11. If all components and electroconducting as it should be, and the system is charged to demanded level, it is necessary to drive away the car on car repair shop for performance of diagnostics and regenerative repair of RSM.
12. More detailed diagnostics of central air of air lies outside the limits of qualification of the average amateur mechanic and its performance should be entrusted to specialists of car-care center.

Coolant addition

For a charging of central air of air of cars considered in the real Management it is necessary to use only refrigerator R-134a oil.


 PERFORMANCE ORDER

1. Prepare standard charging set R-134a (ask in shops of automobile accessories). The structure of a set includes a ballonchik with refrigerator oil in volume of 12 ounces (ounce), a ventilny nozzle and the piece of a hose connected between the gate and the union of a low-pressure head part of a refrigerator path. As one ballonchik of oil it can appear insufficiently for a final charging of system, it is meaningful to buy just in case at once pair. Track, that at least in one of ballonchik oil was tinted in red color that will allow to reveal quickly leakages of a coolant in case of those.

At all do not fill in system more than two ballonchik of a coolant!

2. According to instructions of manufacturers connect a charging set to the LOW-PRESSURE HEAD part of a refrigerator path.
3. Close the gate on a transitional nozzle and screw the last on a ballonchik head, previously having made sure available a sealing ring / rubber laying.

Surely put on goggles!

4. Remove a dustproof cap from the union of a low-pressure head part of a refrigerator path and connect to it equipped with the socket of fast joining a hose of a charging set.

The design of shtutserny knots will not allow to make set connection to a high-pressure head part of a path.

5. Warm up the engine to normal working temperature and include К/В. Track, that the hose of a charging set did not adjoin to blades of fans of systems of cooling of engine/air conditioning and other moving components in an impellent compartment.

The charging of system should be made at the working compressor. If the coupling of coupling of the compressor is disconnected, the system should be switched to the maximum hladoproizvoditelnost and to open all doors of salon.

That the compressor was not disconnected in the course of a charging, disconnect the socket from the sensor switch of low pressure (on some models the combined sensor switch of a low/high pressure is used) and перемкните its paper clip or a piece of a rigid wire.

6. Rotation of a ventilny nozzle pierce a ballonchik head, having opened thereby coolant giving (the characteristic sound of escaping gas should be heard). In the course of all charging discipline a ballonchik vertically, from time to time stirring up it. Between series of a charging do a pause necessary for stabilization of system.

 At all do not download in system more than two ballonchik of a coolant! In order to avoid a ballonchik icing in the course of filling wrap up its towel moistened in warm water.

7. In the presence of near at hand exact thermometer enter it in via the deflector into the central air line To/in and watch temperature of air submitted to salon.
8. When the ballonchik will become empty, block the gate and disconnect a hose from the low-pressure head union of system. At once put on the union a dustproof cap.
9. Disconnect from a ballonchik a ventilny nozzle, in case of need rearrange it on the second ballonchik and continue filling. On termination of procedure put an unfinished ballonchik vertically on a rack and as required use it for system additional charge.

Heating system

 PERFORMANCE ORDER

1. Carpet moistening on a floor under the heater heat exchanger, or a steam-out via deflectors of air lines tell about leakages of the heat exchanger. Remove the heat exchanger (see. The section Removal and installation of the heat exchanger of a heater) also replace it new (the heater heat exchanger is not subject to regenerative repair).
2. If the heater does not provide due heating of air submitted to salon, one of the following can be the reason of such refusal:

a) The thermostat is jammed in open situation that does not allow submitted to heat up to the heat exchanger of a heater of cooling liquid of the engine to normal temperature. Replace the thermostat (see. Section Check of serviceability of functioning and thermostat replacement);
b) Violation of passableness of an okhladitelny path that blocks supply of cooling liquid in the heater heat exchanger takes place. Feel the hoses connected to branch pipes on a back partition of an impellent compartment - both of them should be hot, otherwise passableness of a path is broken (hoses, the heat exchanger, or an operating zaslonka of a heater) are blocked. Disconnect hoses and make obratnopotochny washing of the heat exchanger. Previously having disconnected, wash out also both hoses;
c) If to restore passableness of the heat exchanger by washing it is not possible, it is necessary to make its replacement (see. Section Removal and installation of the heat exchanger of a heater).

Elimination of smells of central air of air

 PERFORMANCE ORDER

1. The unpleasant smells often arising at inclusion To/in are caused by formation of colonies of a mold on plates of the heat exchanger of the evaporator. The warm damp environment creates favorable conditions for emergence and development of fungoid microorganisms.
2. Access to the evaporator heat exchanger on the majority of models is extremely limited. Procedure of the guaranteed complete removal of the mold, carried out in the conditions of a workshop of car-care center is rather labor-consuming, takes away a lot of time and demands application of strong disinfectants. In principle, rather effective processing can be executed and in house conditions by own strengths of the owner of the car.
3. In the aerosol packaging, intended for service of central airs of air, it is possible to get special disinfectants practically in any shop of automobile accessories. It is necessary to remember that the price of means is usually directly proportional to its efficiency. Switch system in a mode of the closed air circulation and for ten minutes turn on the heater fan for the maximum speed. For the purpose of drying of system include heating on the maximum intensity. Disconnect electroconducting from the compressor for the purpose of prevention of its operation.

4. Giving of means is usually carried out through a long hose. Remove rezistorny assembly of the electromotor of a drive of the fan of a heater (see. The section Removal and installation of the electromotor of a drive of the fan of a heater), enter a nozzle of a submitting nozzle into the formed opening and displace it to the left, having directed on the evaporator heat exchanger. Giving of means is carried out according to instructions of his manufacturer. Try to process all surface of the heat exchanger most fully. Duration of each operation cycle and intervals between series should be specified on a container label.

5. The best preventive measure against emergence of colonies of a mold in the heat exchanger of the evaporator is regular check of passableness of a drainage tube, and also short-term inclusion of a mode of removal of condensate after each distant trip with working conditioner for the purpose of evaporator drying.

Climate control system

 PERFORMANCE ORDER

The additional complete set of Nissan Maxima cars can include climate control system. Functioning of system own processor obtaining necessary entrance data from various information sensors operates. As well as RSM this processor includes the block of self-diagnostics providing possibility of fast search and elimination of malfunctions. The operator chooses a demanded temperature mode and exposes it by means of the special handle on the control panel. Further the system starts to support automatically the set air temperature in car salon, regulating as appropriate supply of cold and/or warm air. The high-speed mode of functioning of the fan also is supervised by the microprocessor via consistently switched on controler replacing in this case rezistorny assembly. Complete problem diagnostics and repair of system of climate control lies outside the limits of qualification of the average amateur mechanic. However, the processor is equipped with the device of onboard self-diagnostics with possibility of highlighting of codes of malfunction.