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Clutch pedal switch: testing > < Brake light and brake pedal switches: testing

Leon Mk2

Test process
Test process
–  Attach the -V.A.G. 1551- (-V.A.G. 1552-) and, via the corresponding “address code” 01, select the engine electronics control unit. When doing so, the ignition must be on. (Fault reader: connecting and selecting the engine electronics control unit → Vehicle diagnosis, testing and information system VAS 5051.)
   
Reading on the display:
–  Press 0 and 8 for the function “Read measured value block” and confirm the entry with the Q button.
  
Rapid data transmission             HELP
Select function XX
Reading on the display:
–  Press 0, 0 and 6 for “Display group number 06” and confirm the entry with the Q button.
  
Read measured value block               
Enter value group number XXX
– 
–  Watch the value displayed in field 2. Target value: 0 0 0
–  Slowly apply the brakes.
  
Read measured value block 6            →
0 km/h     0 0 0     0.0 %           255
Target value: 0 1 1 The two digits should change simultaneously from 0 to 1.
t  middle value = brake pedal switch
t  right-hand value = brake light switch
–  Slowly release pressure on brake pedal.
  
Read measured value block 6            →
0 km/h     0 1 1     0.0 %           255
Both digits should change back from 1 to 0.
If one or both digits do not change:
–  Test the switches or the wiring to the switches: → Current flow diagrams, Electrical fault finding and Fitting locations
  
Read measured value block 6            →
0 km/h     0 0 0     0.0 %           255

Clutch pedal switch: testing > < Brake light and brake pedal switches: testing