Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Jeep Grandee Cheroki
+ Jeep Grand Cherokee brand Cars
+ Settings and routine maintenance
+ Ryadny six-cylinder engine
+ V8 Engine
+ Procedures of the general and major maintenance of the engine
+ Systems of cooling, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ System of electric equipment of the engine
- Systems of decrease in toxicity of the fulfilled gases and engine management
   General information
   System of multiitem injection of fuel (MPFI) and information sensors - the description
   Removal and installation of the electronic module of management (RSM)
   Description of a principle of action of system of self-diagnostics and procedure of reading of codes of malfunctions
   Information sensors
   System of operated ventilation of a case (PCV)
   System of a retsirkulyatsiya of the fulfilled gases (EGR)
   Catching system паров fuels (EVAP)
   Catalytic converter
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and operation receptions

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Catalytic converter

In view of hit of the catalytic 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 office.

General description

The catalytic converter is the part of system of decrease in toxicity of the fulfilled gases which is a part of system of production of fulfilled gases and serves for decrease in issue in the atmosphere of toxic components. There are two types of catalytic converters. The ordinary converter of oxidizing type reduces level of the content in the fulfilled gases of hydrocarbonic connections and carbon monoxide (WITH). The three-functional catalytic converter, on a level with hydrocarbons and WITH, provides decrease in level of oxides of nitrogen (NOH).


The diagnostic equipment for check of a condition of the catalytic converter is expensive and extremely difficult in the use. In case of suspicions on violations in operation of the converter drive away the car for check and repair in dealer office or having at the order the corresponding equipment a car-care center workshop.

Each time lifting the car with any purpose over the earth, check the catalytic converter on existence of traces of leaks, corrosion, dents and others damages. Also check a condition of welding seams / flange bolts in a place of fastening of the converter to sections of system of production of the fulfilled gases. The damaged catalytic converter should be replaced without fail.

Though catalytic converters also do not belong to number of often failing knots of the car, from time to time there is their zabivaniye combustion products. The simplest way of check of passableness of the converter is use of the vacuum gage which is connected to the diagnostic union for identification of effect of influence of blocking of release on admission depression.


  1. Open a butterfly valve, having resulted frequency of rotation of the engine in value of 2000 rpm.
  2. Quickly release a zaslonka.
  3. If passableness of the converter is not broken, indications of the vacuum gage will quickly fall to value no more than 51 mm of mercury. or is slightly higher than normal value.
  4. If the vacuum gage does not fix depression by depth of 127 mm of mercury. or is higher than its normal value or for an instant hangs in the highest point before return, passableness of system of production of the fulfilled gases or the catalytic converter is broken (at the expense of blocking by products of combustion, deformation of sections of pipes or shift of partitions in the exhaust silencer).

Replacement of components

See the description of procedures of removal and installation of components of system of production of the fulfilled gases in Head of the Power supply system and production of the fulfilled gases.