Volkswagen Workshop Service and Repair Manuals

The control unit (J248) for the Diesel direct injection system is equipped with a fault memory.

If faults occur in the sensors and components being monitored, they will be stored in the fault memory together with an indication of the type of fault.

The stored faults are output after initiating the fault display .

This fault memory must be erased once the faults have been eliminated => Page 01-33 .

Faults which can be attributed to a temporary open circuit in the wiring or a loose contact, will also be stored. These faults will be displayed as sporadic faults "SP" and are automatically cancelled if they are not repeated after 50 engine starts.

Fault which effect handling are indicated by a blinking glow period warning lamp (K29).