Nissan Maxima QX

since 1993 release

Repair and operation of the car



Nissan Maxima QX
+ Cars of the Nissan Maxima brand
+ Maintenance instruction
+ Settings and routine maintenance
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
- Control systems of the engine
   General information
   System of onboard diagnostics (OBD) - the principle of functioning and codes of malfunctions
   Removal and RSM installation
   Check of serviceability of a state, replacement and adjustment of the sensor of provision of a butterfly valve (TPS)
   Check of a state and replacement of the sensor of measurement of mass of an air stream (MAF)
   Check of a state and replacement of the sensor of absolute pressure in the pipeline (MAR)
   Check of a state and replacement of the sensor of temperature of the soaked-up air (IAT)
   Check of a state and replacement of the sensor of temperature of cooling liquid of the engine (EST)
   Check of a state and replacement of the sensor of provision of a bent shaft (ICR)
   Check of a state and replacement of the sensor of position of the camshaft (SMR)
   Check of a state and replacement of the sensor switch of pressure in system of hydrostrengthening of a wheel (PSP)
   Check of a state and replacement of the oxygen sensor (l-probe)
   Check of a state and replacement of the sensor of a detonation
   Check of a state and replacement of the sensor of temperature of fuel of speed of the movement of the car (VSS)
   Check of a state and replacement of the sensor of speed of the movement of the car (VSS)
   Check of a state and replacement of components of system of stabilization of turns of idling
   Control system of functioning of the power valve
   System of the operated ventilation of a case (PCV)
   System of recirculation of the fulfilled gases (EGR) - the general information, check of a state and replacement of components
   System of catching of fuel evaporations (EVAP) - the general information, check of a state and replacement of components
   The catalytic converter - the general information, check of a state and replacement
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



The catalytic converter - the general information, check of a state and replacement

 In order to avoid violation of the guarantee certificates extending to components of systems of decrease in toxicity of the fulfilled gases you make check and service of the catalytic converter in the conditions of a workshop of car service.


General information


The catalytic converter is a component of systems of decrease in toxicity of the fulfilled gases, is switched on in structure of system of release and serves for decrease in issue in the atmosphere of toxic components. On the cars considered in the present manual catalytic converters of two types are used. The ordinary oxidizing converter allows to reduce the content in the fulfilled gases of hydrocarbons and monoxide of carbon. The three-functional catalytic converter in addition allows to reduce emission of nitrogen oxides (NOH).

CHECK

 PERFORMANCE ORDER

1. The diagnostic equipment for check of serviceability of a condition of the catalytic converter is expensive and extremely difficult in operation. At emergence of suspicions on failure of the converter, drive away the car for check on car repair shop.
2. Every time when the car climbs any reason above the ground, examine the converter on existence of signs of mechanical damages, traces of leaks and development of corrosion. Check a condition of welded seams and reliability of tightening of flange bolts of fastening of the device to sections of system of production of the fulfilled gases. The defective catalytic converter is subject to replacement.
3. Despite reliability of a design of the converter, there is rather high probability of its obstruction. The simplest way of check of passability of the converter is check with use of the vacuum gage:

a) Connect the vacuum gage to a source of depression of the inlet pipeline (see the Part the General capital repairs of the engine of the Head Dvigatel);
b) Warm up the engine up to the normal working temperature, transfer the selector lever to situation "P" (models from AT), or include neutral transfer (models with RKPP) and cock the parking brake;
c) Consider indications of the vacuum gage at single turns of the engine;
d) Open a butterfly valve, having lifted the frequency of rotation of the engine to 2000 rpm;
e) Quickly release the gate and consider indications of the vacuum gage;
f) Repeat the described check still three times, every time writing down result;
g) If the result of the fourth measurement appears more than on 2.5 mm of mercury. below the instrument read at single turns, therefore, there is a probability of violation of passability of the converter, or an exhaust pipe.

Replacement of components

 PERFORMANCE ORDER

See the Head of the Power supply system and release (The section devoted to service of system of production of the fulfilled gases).