Mercedes S-Class W-140

In 1991-1999 editions

Repair and enterprise of the car


Mercedes S-Class
+ Mercedes Benz cars of the class S (W-140)
+ operation manual
+ Routine maintenance
+ motor
+ Cooling systems, heating
- Systems of power supply and edition
   + system of power supply and an injection of the combustible petrol engine - the general information
   - System of an injection of the combustible diesel engine - the general information
      Checks of system of an injection of fuel
   + tax system injection of fuel and ignition of HFM-SFI (6-cylinder petrol engines)
   + tax systems LH-SFI and ME-SFI motor (8-cylinder petrol engines)
   + tax systems injection of fuel and ignition of ME-SFI and LH-SFI (12-cylinder petrol engines)
   + tax system fuel injection (diesel engines of the OM603.971 series)
   + tax system fuel injection (diesel engines of the OM606.961 series)
   + system of a turbo charging - the general information
   Systems of immersion of toxicity of the edition - the general information
   System of the edition of the working gases - the general information
   Catalytic reformer (petrol models)
+ electric equipment of the motor
+ gear shifting boxes
+ Awtomatitscheckaja transmission
+ connection
+ brake system
+ Aufhängung and management
+ body
+ electric onboard equipment


Checks of system of an injection of fuel

Before starting service, get acquainted with precautionary measures which are given in office of a precautionary measure and the rule of attention of purity in operating time with system of fuel

At detection of defect of system of an injection of fuel are convinced of reliability of the introduction of all plugs and absence on its surfaces of traces of corrosion, first of all. Are convinced further that defect is not caused by disrespect of regular service (You check the filter for purification of air, the room of a running cycle of gates, compression in the cylinder, the filter for fuel). Are convinced also that hoses of system of ventilation of kartera are not blocked (it watch chapter Routine maintenance).

If after conducting the checks described above the reason of defect is not spread, banish the car on 100 for performing diagnostics. In the lower part of the panel of devices from the driver there is a diagnostic plug in which the special diagnostic equipment joins. This equipment you read Kodes of defects which try to obtain in memories of the control unit it is enclosed.

Kodes of defects can be schitana by means of the special diagnostic scanner which is available on 100, or the personal computer with special payment, at the program and a cable.

By means of Kodes reading you can easily find defect even if it is not obvious. They can check any knot without application of the diagnostic Kodes scanner, but think you that amateur intervention in system can lead to damage of electronic knots.

If there is a diesel speedometer or other approaching equipment in your order, you can measure idling changes. But regulation of these characteristics is not made. Wrong nozzles can serve for a reason for rejection of changes of idling. In this case it is necessary to clean them and otkalibrowat. The term of nozzles is unlimited, but can occur thus that have to repair you after the movement about 100 000 km them or replace. The expert has to fill repair and calibration of nozzles.