Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Jeep Grand Cherokee
+ Cars of mark Jeep Grand Cherokee
+ Options and routine maintenance
+ Рядный the six-cylinder engine
+ Engine V8
+ Procedure of the general and engine major repairs
+ Systems of cooling, heating and air conditioning
+ The power supply system and release of the fulfilled gases
+ System of an electric equipment of the engine
- Systems of decrease in toxicity of the fulfilled gases and engine management
   The general information
   System of multiitem injection of fuel (MPFI) and information gauges - the description
   Removal and installation of the electronic module of management (РСМ)
   The description of a principle of action of system of self-diagnostics and procedure of reading of codes of malfunctions
   Information gauges
   System of operated ventilation картера (PCV)
   System recycling the fulfilled gases (EGR)
   System of catching of steams of fuel (EVAP)
   The Katalitichesky converter
+ Manual box of a gear change
+ Automatic transmission
+ Distributing box
+ Coupling and трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of an onboard electric equipment
+ Controls and operation receptions


The Katalitichesky converter

In view of hit каталитического the converter in number of the devices protected by guarantee certificates before starting replacement at own expense it is necessary to make its check in a workshop of dealer branch.

The general description

The Katalitichesky converter is the part of system of decrease in toxicity of the fulfilled gases which is a part of system of release of fulfilled gases and serves for issue decrease in atmosphere of toxic components. There are two types каталитических converters. The usual converter of oxidising type reduces maintenance level in the fulfilled gases of hydrocarbonic connections and carbonic oxide (WITH). Three-functional каталитический the converter, on a level with hydrocarbons and WITH, provides level decrease оксидов nitrogen (NOх).


The diagnostic equipment for condition check каталитического the converter is expensive and extremely difficult in the use. In case of occurrence of suspicions on infringements in converter work drive away the car for check and repair in dealer branch or having in the order the corresponding equipment a car-care centre workshop.

Each time lifting the car with any purpose over the earth, check каталитический the converter on presence of traces of leaks, corrosion, dents and others damages. Also check a condition of welding seams/flantsevyh of bolts in a place of fastening of the converter to sections of system of release of the fulfilled gases. Damaged каталитический the converter should be replaced without fail.

Though каталитические converters also do not belong to number of often failing knots of the car, from time to time occurs them забивание combustion products. The elementary way of check of passableness of the converter is use of the vacuum gauge which is connected to the diagnostic union for revealing of effect of influence of blocking of release on admission depression.


    Open throttle заслонку, having led to frequency of rotation of the engine to value of 2000 rpm. Quickly release заслонку. If passableness of the converter is not broken, vacuum gauge indications will quickly fall to value no more than 51 mm hg or a little above normal value. If the vacuum gauge does not fix depression by depth of 127 mm hg or above its normal value or for an instant hangs in the highest point before return, passableness of system of release of the fulfilled gases or каталитического the converter is broken (at the expense of blocking by products of combustion, deformation of sections of pipes or displacement of partitions in the muffler).

Replacement of components

The description of procedures of removal and installation of components of system of release of the fulfilled gases in the Head of the Power supply system and release of the fulfilled gases see.