SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4 cylinder injektion engine. (2.0l, 2 valve) | Mixture preparation system, electronic inj.,Gas | Engine control unit | Engine control unit fault memory: reading and erasing

Fault memory: consulting

Verification process

–	Connect the Vehicle Diagnosis, Testing and Information System -VAS 5051- as follows:

–	Connect the cable -VAS 5051/3- to the diagnostic connection.

–	Start engine and run at idling speed.

Note!

If the engine does not start then run it using the starter motor for at least 5 seconds. Do not switch off the ignition under any circumstances.

Select operating mode:

–	Push the button on the -VAS 5051- screen “Vehicle self-diagnosis”.

Select vehicle system:

–	Press briefly on the screen -1- selection “01 – Engine electronics”.

The control unit identification and coding are indicated on the display

–	Press key ► to continue.

Select diagnostic function:

Indicated on -VAS 5051-

–	Press briefly on the screen -1- the diagnostic function “02 – Consult fault memory”.

Indicated on -VAS 5051-

1 -	Contents of fault memory

t	0 faults detected

t	X Fault(s) detected

2 -

Fault

t	Fault code

t	Fault location

t	Type of fault

If more than one faults were detected:

–	Print the contents of the screen or the self-diagnosis protocol.

–	Terminate the function “02 – Consult the fault memory” press the button briefly <.

–	Rectify all faults.

–	For selection, the diagnostic function must be pressed again “02 – Consult fault memory” and erase fault memory → Chapter.

–	Press briefly on the diagnostic function selection “06 – End data transmission”.

–	If the fault memory is erased, it will be necessary to generate the readiness code: → VAS 5051; Vehicle self-diagnosis.

If no faults were recognised:

–	Terminate the function “02 – Consult the fault memory” press the button briefly <.

–	Press briefly on the diagnostic function selection “06 – End data transmission”.

Note!

t	If no faults are recorded, do not clear fault memory as readiness code would be set to zero.

t	If the fault memory is erased, it will be necessary to generate the readiness code again: → VAS 5051; Vehicle self-diagnosis.

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