Audi A4, S4
Introduction
Controls and receptions of safe operation
Current leaving and service
The engine
Systems of cooling, heating and the air conditioner
Power supply systems, release and decrease in toxicity of the fulfilled gases
- Systems of an electric equipment of the engine
    Ignition and engine management system
    System of preheat of the diesel engine
   - Diagnostics of systems of electronic control and the diagnostic equipment
      The general data
      Diagnostics of electronic control systems by the engine, injection, ignition and auxiliary brake systems
      The controller of interface of the personal computer with onboard system of self-diagnostics OBD II under reports of standards SAE (PWM and VPW) and ISO 9141-2
      Application of an oscillograph for supervision of signals in chains of control systems
    Gymnastics and start systems
Manual box of a gear change
Automatic transmission
Coupling, power shafts and differential
Brake system
Suspension bracket and steering
Body
Onboard electric equipment



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Diagnostics of electronic control systems by the engine, injection, ignition and auxiliary brake systems

The arrangement of a socket for connection of the diagnostic equipment is resulted on an illustration more low. Decoding of codes is resulted in Specifications.

Appointment of contacts of a 16-contact diagnostic socket - see the scheme Diagnostic socket DLC.

Arrangement of a 16-contact diagnostic socket

16-contact diagnostic socket of system of onboard diagnostics OBD II