seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

ABOUT US
Checking modulating piston movement sender G149 . > < Test conditions

Leon Mk2

Test sequence
Test sequence
–  Connect fault reader -V.A.G 1551- (-V.A.G 1552-) and select engine electronics control unit with the “Address word” 01. When doing this the engine must be running at idling speed. (Connecting fault reader and selecting engine electronics control unit → Vehicle diagnosis, testing and information system VAS 5051.)
   
Indicated on display:
–  Press keys 0 and 8 for the function “Read measured value block” and confirm entry with Q key.
  
Rapid data transfer                 HELP
Select function XX
Indicated on display:
–  Press keys 0, 0 and 1 for “Display group number 1” and confirm entry with Q key.
  
Read measured value block           HELP
Input display group number XXX
Indicated on display:
–  Check coolant temperature in display zone 4. Specification: at least 85 °C
Continue with check only when coolant temperature is attained.
  
Read measured value block 1            →
880 rpm   6.5 mg/H    1.580 V    87.3 °C
– 
–  Check voltage supply from modulating piston movement sender in display zone 3. Specification: 1.500... 2.100 V
–  If specification is not attained. Check modulating piston movement sender and metering adjuster as described in following:
–  Press the → key.
–  Press keys 0 and 6 for the function “End output” and confirm entry with the Q key.
–  Switch off ignition.
  
Read measured value block 1            →
880 rpm   6.5 mg/H    1.580 V    87.3 °C

Checking modulating piston movement sender G149 . > < Test conditions