General Information
Motronic system, On Board Diagnostic (OBD)
On Board Diagnostic, Technical Data
Equipment
The advantages of OBD can only be fully exploited by using the vehicle diagnostic, testing and information system VAS5051 or the VAG1551 scan tool, in operating mode 1 "Rapid data transfer."
The DTC memory is equipped with a permanent memory and therefore does not depend on the voltage (power) supply.
The stored malfunctions will be displayed after checking the DTC memory.
After eliminating malfunctions the DTC memory must be erased.
Important Note:
- Every time the DTC memory is erased and the voltage supply to the Motronic Engine Control Module (ECM) -J220 has been interrupted a new readiness code must be generated.
- The Exhaust Malfunction Indicator Light (MIL) in the instrument cluster will be switched on if the Engine Control Module (ECM) recognizes malfunctions that have an affect (decrease emission values) on exhaust emissions.
- Malfunctions relating to the electronic throttle are also indicated by the Electronic Power Control (EPC) warning light in the instrument cluster.
Control Module Identification (Example)
The display on VAG1551 will show the control module identification, for example:
4D0907551... 2.7L V6/5VT G0002 ->
Coding 06711 WSC 06388
4D0907551 Engine Control Module (ECM) Part No.
2.7Liter Engine displacement
V6/5VT Engine configuration (V6 5 - valve Turbo1)
- G or no display "G" for vehicles with Cruise control system or not
- 0002 ECM Software version
- Coding 06712 Coding of ECM
- WSC 06388 Dealership code of VAG1551 with which the last coding was carried out
1)The engine is a so called "Bi" turbo engine, that means the engine is equipped with two turbochargers. "Bi" (latin) stand for two.
If the coding differs from the vehicle version, then:
- Check coding of Engine Control Module (ECM) Coding ECM
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
NOTE: After pressing the HELP button, en overview of the possible functions is printed out.