Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   + the Power supply system and injection of fuel of the petrol engine - the general information
   - System of injection of fuel of the diesel engine - the general information
      Checks of system of injection of fuel
   + Control system of injection of fuel and HFM-SFI ignition (6-cylinder petrol engines)
   + Control systems of the LH-SFI and ME-SFI engine (8-cylinder petrol engines)
   + Control systems of injection of fuel and ME-SFI and LH-SFI ignition (12-cylinder petrol engines)
   + Control system of fuel injection (diesel engines of the Om603.971 series)
   + Control system of fuel injection (diesel engines of the Om606.961 series)
   + turbo-supercharging System - the general information
   Systems of decrease in toxicity of release - the general information
   System of production of the fulfilled gases - the general information
   Catalytic converter (petrol models)
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Checks of system of injection of fuel

Before starting to work, familiarize with the precautionary measures given in the Section of the Security measure and a rule of observance of purity at work with fuel system

At failure detection of system of injection of fuel first of all be convinced of reliability of connection of all sockets and absence on their surfaces of traces of corrosion. Further be convinced that malfunction is caused not by neglect regular service (check an air purifier, working gaps of valves, a compression in cylinders, the fuel filter). Be convinced also that hoses of system of ventilation of a case are not blocked (see. Head Routine maintenance).

If after carrying out described above checks the cause of defect is not found, drive away the car on HUNDRED diagnostics for carrying out. In the lower part of the dashboard from the driver there is a diagnostic socket which the special diagnostic equipment joins. This equipment reads out the codes of malfunctions fixed in memory of the control unit.

Codes of malfunctions can be считаны means of the special diagnostic scanner which is available on HUNDRED, or the personal computer with a special payment, the program and a cable.

By means of reading of codes you can easily find malfunction even if it is not obvious. You can check any knot without use of the diagnostic scanner of codes, but keep in mind that nonprofessional intervention in system can lead to damage of electronic knots.

If at your order there is a diesel tachometer or other suitable equipment, you can measure idling turns. But adjustment of these parameters is not made. As a reason for rejection of turns of idling faulty nozzles can serve. In this case they are necessary for clearing and откалибровать. Service life of nozzles is unlimited, but can happen so that you should repair or replace them after run about 100 000 kilometers. The expert should carry out repair and calibration of nozzles.