Audi:: A4 B6:: Diagnostics of electronic control systems of the engine, injection, ignition and auxiliary brake systems

1. Introduction
2. Governing bodies and methods of safe operation
3. Current leaving and service
4. Engine
5. Cooling systems, heating and air conditioner
6. Power supply systems, release and decrease in toxicity of the fulfilled gases
7. Systems of electric equipment of the engine
- 7.1. System of ignition and engine management
- 7.2. System of preheat of the diesel engine
- 7.3. Diagnostics of systems of electronic control and diagnostic equipment
  - 7.3.1. General information
  - 7.3.2. Diagnostics of electronic control systems of the engine, injection, ignition and auxiliary brake systems
  - 7.3.3. The controller of interface of the personal computer to onboard system of self-diagnostics of OBD II under protocols of the SAE standards (PWM and VPW) and ISO 9141-2
  - 7.3.4. Application of an oscillograph for observation of signals in chains of control systems
- 7.4. Systems of charging and start
8. Manual box of gear shifting
9. Automatic transmission
10. Coupling, power shafts and differential
11. Brake system
12. Suspension bracket and steering
13. Body
14. Onboard electric equipment

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

The socket arrangement for connection of the diagnostic equipment is given on an illustration below. Interpretation of codes is given in Specifications.

Purpose of contacts of the 16-contact diagnostic socket - see the scheme Diagnostic I will corrode DLC.

Arrangement of the 16-contact diagnostic socket

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