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
   General information
   Engine start from an auxiliary source
   Check of a condition and replacement of wires of the battery
   Removal and battery installation
   Ignition system - the general information
   Check of serviceability of functioning of system of ignition
   Check of serviceability and replacement of the coil of ignition
   Check of serviceability and replacement of the sensor of provision of a camshaft
   Removal and distributor installation
   Charge system - the general information and precautionary measures
   Check of serviceability of functioning of system of a charge
   Removal and generator installation
   Start system
   Diagnostics of malfunctions of a starter without its removal from the car
   Removal and starter installation
   Removal and installation of the traction relay (engines in volume of 4.0 l)
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ 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



Check of serviceability of functioning of system of ignition

In view of the highest values of ignition of tension developed by system, at performance of any works on service of its components it is necessary to observe special precautionary measures. Such components treat not only directly the ignition coil, the sensor of provision of a camshaft and candle wires, but also and the accompanying components connected to system, such as electric sockets, a tachometer and diagnostic the equipment.

Base check of serviceability of system of ignition and giving of a food of the battery on the module of management (RSM) is inclusion of a control lamp "Battery" or «Pressure of oil» at ignition key turn in the situation ON.

 PERFORMANCE ORDER

  1. Check sockets and plugs of all wires of a contour of ignition on reliability of fastening, existence of cracks, traces of corrosion and other signs of deterioration of contact.
  2. By means of the calibrated tester of ignition make sure of adequacy of secondary tension (25 000 In) on each of spark plugs. Violation or weakening of contact is fraught with ignition admissions. Besides check internal walls of protective covers of tips of candle wires on existence of coal paths.
  1. For connection of the calibrated tester of ignition simply disconnect a candle wire and connect it to a tester, then earth a tester and turn the engine - the developed capacity is sufficient for formation of a spark on a candle, that and will slip between a tip of an electrode and the tester case.
  1. Examine on existence of coal paths the ignition coil. In case of detection of those replace the coil and track, that wires of a secondary contour of the coil were cleared and reliably fixed. Excessive value of resistance of wires or malfunction of sockets (contacts) is fraught with a coil exit out of operation.
  2. By means of an ohmmeter measure resistance between coil plugs. If at this check break is revealed (confirmed with infinite instrument reading), replace the coil (The section Check of serviceability and replacement of the coil of ignition).
  3. Check a distributor cover on existence of coal paths and an erosion or cracks of plugs.
  1. Carefully survey an internal surface of a cover of the distributor on existence of damages.
  1. Existence on a cover of cracks, defects of acting frames of plugs and coal paths can be revealed by a way of supervision over an iskroobrazovaniye in the area to a distributor cover on started in dark (but well ventilated) a room the engine.
  1. By means of an ohmmeter measure resistance of candle wires. Resistance of each of them should make not less than 25 000 Ohm.
  2. Check functioning of the valve of automatic shutdown of supply of fuel (ASD) (Head of the Power supply system and production of the fulfilled gases).
  3. Check functioning of the sensor of provision of a camshaft (The section Check of serviceability and replacement of the sensor of provision of a camshaft).
  4. If results of all listed above checks are positive, Check peak (on tension) a signal from the processor. Having used a control lamp on a light-emitting diode make sure available a food on a white-gray wire of the socket of the coil of ignition. Disconnect a secondary wire of the coil and earth the plug on mass of the engine. Now ask the assistant to turn the engine and watch pulsing flashes of a control lamp (light-emitting diode). Absence of flashes with a big share of probability speaks about malfunction of the processor. Make diagnostics of malfunctions of RSM in a workshop of dealer office.
  1. Connect a control lamp to the positive plug (a white-gray wire) coils and watch its flashes at an engine provorachivaniye.

More complete checks of system should be made in dealer office or a car-care center workshop.