seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

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Check the throttle valve's potentiometer > < If the display always reads: 0, continue testing as follows:

Leon Mk2

Check the operating state
Check the operating state
–  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 buttons 0 and 8 for the function “Read the measurement values block” and confirm the entry with the Q button.
  
Rapid data transfer                 HELP
Select function XX
Display reading:
–  Press buttons 0, 9, and 8 for “Display group number 98” and confirm the entry with the Q button.
  
Read measurement values block       HELP
Enter display group number XXX
Display reading: (1...4 = display fields)
–  Check the throttle valve control unit's operating state in display field 3.
Meaning of the numbers in the 4 digit numerical block regarding the throttle control unit's operating state
  
Read measurement values block 98       →
         1         2         3         4
xxxxMeaning in case of digits = 1
1   Fault detected during throttle valve adaptation (consult the fault memory → Vehicle diagnosis, testing and information system VAS 5051)
 1  Throttle control unit, without current (proportion of the period = 0)
  1 Adaptation interrupted due to insufficient battery voltage (less than 8 V)
   1Idle switch open (switch consultation)

If the theoretical values are not reached:
–  Adapt the engine control unit to the throttle control unit → Chapter.
–  Repeat the test.
If once again the theoretical values are not reached:
–  Test the throttle control unit's voltage supply as well as the cables towards the control unit → Chapter.
   

Check the throttle valve's potentiometer > < If the display always reads: 0, continue testing as follows: