SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cyl. injection motor (push rods), mechanics | Mixture preparation system, electronic inj.,Gas

Testing procedure

–	Attach the unit -V.A.G. 1551- (-V.A.G. 1552-). Switch on the ignition and enter “direction code” 01 to select the engine control unit. (Fault finder: Connect and select the engine control unit → Vehicle diagnosis, testing and information system VAS 5051.)

Display reading:

–	Press the 0 and 8 buttons for the function “Read measurement values block” and confirm the entry with the Q button.

Rapid data transfer                 HELP

Select function XX

Display reading:

–	Press buttons 0, 0, and 5 for “Display group number 99” and confirm the entry by pressing the Q button.

Read measurement values block       HELP

Enter display group number XXX

Display reading: (1...4 = display fields)

–	Read the value displayed in field 2. Theoretical value: 11.5 V at least

–	Press the button →.

–	Press buttons 0 and 6 for the function “End data transmission” and confirm the entry with the Q button.

–	Switch off the ignition.

If the theoretical value is not attained

Read measurement values block 5        →

         1         2         3         4

–	Attach the test box -V.A.G. 1598/22- to the control unit cabling harness.

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