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
- Engine electric equipment
   - Ignition and engine management systems - the general information
      Checks of a control system by ignition and injection
      Search of malfunctions - the general information and preliminary checks
      Check and adjustment of a corner of an advancing of ignition
      Spark plugs
      Self-diagnostics of systems of electronic control of OBD
      Diagnostics of electronic system of the automatic conditioner of air (KV)
      Oscillograph application for supervision of signals of a control system
      Ignition coils - installation details
      Removal, installation and adjustment of the sensor of provision of a camshaft (CMP)
      The ignition distributor (M119.97 engines) - installation details
   + charge and start Systems
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Diagnostics of electronic system of the automatic conditioner of air (KV)

Diagnostic codes besides the special scanner can be считаны from the Quarter control unit display. Codes of malfunctions remain even at shutdown of the storage battery.

Reading of codes


1. Include ignition;
2. Transfer handles of a choice of temperature to the provisions HI left and LO right;
3. During 20 seconds after transfer of handles at the same time press and hold during 5 seconds of the REST and EC button;
4. The light-emitting diode of the RECIRCULATION key will start to blink and on the display there will be OFF
5. Press the right AUTO button more than 1 second. If malfunctions in memory are not fixed, in the left part of the display there will be E, and in the right FF. Otherwise in the left part Ebl, and in right - a malfunction code (address to the list of KV codes) is displayed;
6. For a conclusion of a code of the following malfunction press the AUTO button;
7. For deleting of codes after their complete reading press the right and left AUTO buttons more than 2 seconds. In the left part of the display d, in the right FF is displayed;
8. By pressing of the right AUTO button there is a restoration of the erased codes (compare to the codes which have been written down earlier);
9. After removal of codes in the left part of the display E, in the right FF is displayed;
10. Establish the handle of a choice of temperature in normal situation;
11. Switch off ignition.