SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4-Cyl. injection engine, (1.4 ltr. engine, 2 valve) | Mixture preparation system, electronic inj.,Gas

Reading and erasing engine control unit fault memory

Special tools and workshop equipment required

t	Vehicle diagnosis, testing and information system -VAS 5051-

t	Diagnosis cable -VAS 5051/1- or -VAS 5051/3-

Procedure

–	Remove secure lid.

–	Connect vehicle diagnosis, testing and information system -VAS 5051- as follows:

–	Fit connector from diagnosis cable -VAS 5051/1- or -VAS 5051/3- to diagnosis connection.

–	Start engine and run at idling speed.

Only if engine does not start:

–	Switch on ignition.

Select operating mode

–	Press button for “Vehicle self-diagnosis” on display.

Select vehicle system

–	Press button “01 - Engine electronics” on display.

The control unit identification and coding are indicated on the display.

Select diagnostic function

–	Press button “02 - Interrogate fault memory” on display.

If no fault is stored in engine control unit “0 fault(s) detected” is displayed.

If faults are stored in the engine control unit, these are shown one below the other on the display.

–	Press the ←-button.

–	Press button “05 - Erase fault memory” on display.

–	Press function “06 - End output”.

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