General Information

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 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 the readiness code must be generated.
- The Exhaust Malfunction Indicator Light (MIL) in the instrument cluster will be switched on if the engine control module recognizes malfunctions which have an affect (decrease emissions) on exhaust emissions.
- Malfunctions relating to the electronic throttle are also indicated by a Electronic Power Control (EPC) warning light in the instrument cluster.