Mercedes C-Class

W203 since 2000 of release

Repair and car operation



Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
+ Power supply system and release
- Engine electric equipment
   + ignition and engine management System
   + System of preheat of the diesel engine
   - Diagnostics of systems of electronic control and diagnostic equipment
      Diagnostics of electronic control systems by the engine, injection, ignition and auxiliary brake systems
      The controler of interface of the personal computer with onboard system of self-diagnostics of OBD II according to protocols of the SAE standards (PWM and VPW) and ISO 9141-2
      Diagnostics of electronic system of the automatic conditioner of air (KV)
      Oscillograph application for supervision of signals in chains of control systems
   + charge and start Systems
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



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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

Include ignition;

Transfer handles of a choice of temperature to the provisions HI left and LO right;

During 20 seconds after transfer of handles at the same time press and hold during 5 seconds of the REST and EC button;

The light-emitting diode of the RECIRCULATION key will start to blink and on the display there will be OFF.

Press the right AUTO button more long 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 below) is displayed;

For a conclusion of a code of the following malfunction press the AUTO button;

For deleting of codes after their complete reading press the right and left AUTO buttons more long than 2 seconds. In the left part of the display d, in the right FF is displayed;

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);

After removal of codes in the left part of the display E, in the right FF is displayed;

Establish the handle of a choice of temperature in normal situation;

Switch off ignition.