Mercedes M-Class W163

since 1997 release

Repair and operation of the car



Mercedes W163
+ Mercedes-Benz cars of a class M (W163)
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   General information and precautionary measures
   Search of causes of failures of electric equipment
   Safety locks - the general information
   Chain breakers - the general information
   The relay - the general information and check of serviceability of functioning
   Digital tire of data of CAN
   + Assembly blocks, elements of control systems
   + Dashboard, switches, traveling computer
   + Driving electric motors
   + Alarm and lighting fixtures, sensors of a rain and temperature of external air
   + Systems of additional safety (SRS)
   + Audio system
   + Schemes of electric connections


Search of causes of failures of electric equipment

The procedures described below allow to make the general diagnostics of a condition of the main electric contours, however should not be applied to check of the electric systems open to injury, in particular, which are turning on electronic modules of management in the structure!

General information

The typical electric contour consists of the consumer of the electric power (a working element), a set of switches, the relay, executive electric motors, safety locks, fusible inserts / breakers of a chain concerning work of this element, and also connecting electrical wiring, its contact plugs and sockets. For the purpose of simplification of implementation of diagnostic procedures schemes of electric connections of systems of onboard electric equipment are provided in the last Section of the present Chapter.

Before starting search