seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

ABOUT US
Sealing of the fuel system: check > < Removing and installing high-pressure pump

Leon Mk2

Performing first fuel filling after installing high-pressure pump
Performing first fuel filling after installing high-pressure pump
  Caution
After installation, the high-pressure pump must first be filled with fuel before the engine is started (the pump must NOT be allowed to run while still empty).
  Note
t  When installing the high-pressure pump, it is essential to ensure that no dirt enters the fuel system.
t  Remove the stopper just before the assembly of the fuel lines.
t  Fuel must be present in the fuel tank of the vehicle.
   
Proceed as follows to fill high-pressure pump with fuel.
–  Connect the central diagnosis -VAS 505X-.
–  Switch ignition on.
–  Connect vehicle diagnosis tester and perform the guided function „Bleeding fuel system“ or „Filling/bleeding fuel system“ depending on software version.
  Note
The fuel pumps will now be activated for a total of 3 minutes.
–  Start engine.
–  After filling fuel system, leave engine running at moderate speed for a few minutes and then switch off again.
–  Check the entire fuel system for leaks.
–  Interrogate fault memory and erase stored fault if necessary.
–  Then test drive the vehicle over a distance greater than 20 km with at least one full acceleration. Immediately check again the high pressure zone to look for leaks.
  Note
If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and erase the fault memory. Then continue road test.
–  Read fault memory.
  E45-10037

Sealing of the fuel system: check > < Removing and installing high-pressure pump