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Mixture preparation system, electronic inj.,Gas > < Electronic power control (EPC)

Leon Mk1

Checking tank breather (vent) valve
Checking tank breather (vent) valve
Engine codes: ANV, AUC, AUD, ANW
  Note!
Tank venting valve is closed when no current is supplied.
Checking activation:
→ Vehicle diagnosis, testing and information system VAS 5051
Special tools and workshop equipment required
t  Fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3A-
Test conditions
l  Fuse No. 1 must be OK.
l  Coolant temperature must be at least 80 °C, ⇒ display group 04, display zone 3.
Functional check
–  Connect fault reader -V.A.G 1551- (-V.A.G 1552-). Start engine and select the engine control unit with the “Address word” 01. Connecting fault reader and selecting engine control unit: → Vehicle diagnosis, testing and information system VAS 5051
   
Indicated on display:
–  Press keys 0 and 4 for the function “Introduction of basic setting” and confirm entry with Q key.
  
Rapid data transfer                 HELP
Select function XX
Indicated on display:
–  Press keys 0, 7 and 0 for “Display group number 70” and confirm entry with Q key.
  
Basic setting                           
Input display group number XXX
Indicated on display: (1...4 = Display zones)
  Note!
The engine must not be loaded during this diagnosis because the diagnosis will be interrupted and will not be started again until the engine is revved-up.
When the diagnosis is initiated by the engine control unit the display in display zone 4 jumps from “Test OFF” to “Test ON”
–  Run engine at idling speed until the Specification “TBV OK” is displayed in display zone 4.
If the display indicates as described:
–  Press → key.
–  Press keys 0 and 6 for the function “End output” and confirm entry with the Q key.
–  Switch off ignition.
If the display does not indicate as described:
–  Press → key.
–  Introduce final control diagnosis and activate tank venting valve -N80-: → Vehicle diagnosis, testing and information system VAS 5051
–  Interrogate fault memory: → Vehicle diagnosis, testing and information system VAS 5051
  
System in basic setting       70       →

      

      

    


Mixture preparation system, electronic inj.,Gas >
< Electronic power control (EPC)