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
+ Power supply system and release
+ engine Electric equipment
- Control systems of the engine
   General information
   System of onboard diagnostics (OBD) - a principle of functioning and codes of malfunctions
   Removal and RSM installation
   Check of serviceability of a condition, replacement and adjustment of the sensor of provision of a butterfly valve (TPS)
   Check of a condition and replacement of the sensor of measurement of weight of an air stream (MAF)
   Check of a condition and replacement of the sensor of absolute pressure in the pipeline (MAR)
   Check of a condition and replacement of the sensor of temperature of soaked-up air (IAT)
   Check of a condition and replacement of the sensor of temperature of cooling liquid of the engine (eats)
   Check of a condition and replacement of the sensor of provision of a cranked shaft (SKR)
   Check of a condition and replacement of the sensor of provision of a camshaft (SMR)
   Check of a condition and replacement of the sensor switch of pressure in system of hydrostrengthening of a wheel (PSP)
   Check of a condition and replacement of the oxygen sensor (l-probe)
   Check of a condition and replacement of the sensor of a detonation
   Check of a condition and replacement of the sensor of temperature of fuel of speed of movement of the car (VSS)
   Check of a condition and replacement of the sensor of speed of movement of the car (VSS)
   Check of a condition and replacement of components of system of stabilization of turns of idling
   Control system of functioning of the capacity valve
   System of operated ventilation of a case (PCV)
   System of a retsirkulyatsiya of the fulfilled gases (EGR) - the general information, check of a condition and replacement of components
   System of catching of fuel evaporations (EVAP) - the general information, check of a condition and replacement of components
   The catalytic converter - the general information, check of a condition 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 condition and replacement

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


General information


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

CHECK

 PERFORMANCE ORDER

1. The diagnostic equipment for check of serviceability of a condition of the catalytic converter is expensive and the extremely difficult in operation. At emergence of suspicions on failure of the converter, drive away the car for check on car repair shop.
2. Each time when the car for any reason rises over the earth, examine the converter on existence of signs of mechanical damages, traces of leaks and corrosion development. Check a condition of welded seams and reliability of a 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 passableness 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. Part General major maintenance of the engine of Head Engine);
b) Warm up the engine to normal working temperature, transfer the selector lever to the situation "R" (models from AT), or include neutral transfer (models with RKPP) and cock the parking brake;
c) Consider vacuum gage indications at single turns of the engine;
d) Open a butterfly valve, having lifted frequency of rotation of the engine to 2000 rpm;
e) Quickly release a zaslonka and consider vacuum gage indications;
f) Repeat the described check still three times, each 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 passableness of the converter, or an exhaust pipe.

Replacement of components

 PERFORMANCE ORDER

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