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
   The general information
   Start of the engine 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 gauge of position of a camshaft
   Removal and distributor installation
   Charge system - the general information and safety 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 4.0)
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ 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

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Check of serviceability of functioning of system of ignition

In view of the highest values of ignition of pressure developed by system, at performance of any works on service of its components it is necessary to observe special safety measures. Such components concern not only directly coil of ignition, the gauge of position of a camshaft and candle wires, but also and the accompanying components connected to system, such as electric sockets, a tachometre and diagnostic the equipment.

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

 PERFORMANCE ORDER

  1. Check up sockets and plugs of all wires of a contour of ignition on reliability of fastening, presence 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 pressure (25 000) on each of spark plugs. Infringement or contact easing is fraught with ignition admissions. Besides check up internal walls of protective covers of tips of candle wires on presence 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 - developed capacity is sufficient for spark formation on a candle, that and will slip between a tip of an electrode and the tester case.
  1. Examine on presence 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 have been 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 the given check breakage is revealed (confirmed with an infinite instrument reading), replace the coil (Section Check of serviceability and replacement of the coil of ignition).
  3. Check up a distributor cover on presence of coal paths and erosion or cracks of plugs.
  1. Carefully survey an internal surface of a cover of the distributor on presence of damages.
  1. Presence on a cover of cracks, defects of acting frames of plugs and coal paths can be revealed by supervision for искрообразованием in area to a distributor cover on started in dark (but well ventilated) a premise 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 up functioning of the valve of automatic switching-off of giving of fuel (ASD) (the Head of the Power supply system and release of the fulfilled gases).
  3. Check up functioning of the gauge of position of a camshaft (Section Check of serviceability and replacement of the gauge of position of a camshaft).
  4. If results of all listed above checks are positive, Check up peak (on pressure) a signal from the processor. Having taken advantage of a control lamp on a light-emitting diode make sure available a food on a white-grey wire of a socket of the coil of ignition. Disconnect a secondary wire of the coil and earth the plug on weight of the engine. Now ask the assistant to turn the engine and observe of pulsing flashes of a control lamp (light-emitting diode). Absence of flashes with the big share of probability speaks about malfunction of the processor. Make diagnostics of malfunctions РСМ in a workshop of dealer branch.
  1. Connect a control lamp to the positive plug (a white-grey wire) coils and watch its flashes at проворачивании the engine.

Fuller checks of system should be made in dealer branch or a car-care centre workshop.