GLI L4-2.0L Turbo (CCTA) (2008)
CAUTION:
The digital manometer VAS 6394/1 is under high fuel pressure.
-
With the engine running, disconnect the connector from the fuel pressure regulator valve N276. The fuel pressure will drop to
approximately 6 bar.
-
Switch off ignition.
-
Place a rag around the fuel pressure regulator valve G247, then carefully loosen the fuel pressure regulator valve G247 to release the
remaining pressure.
If pressures do not match:
-
Fuel pressure sensor G247 replacing.
If measured value do not match again:
-
Perform a wiring test.
If measured values match:
-
Further testing is found in "Guided Fault Finding".
Fuel Pressure Test
Diagnostic Procedures
Fuel Pressure Test
Special tools, testers and auxiliary items required
‹› multimeter.
‹› fuel line adapter set (V.A.G. 1318/17A). These tools may be substituted with an equivalent aftermarket tool and are also available for rental or
purchase through Volkswagen.
‹› In line Fuel pressure gauge with shutoff valve. (high pressure).
Test conditions
‹› Battery voltage 12.5 V
‹› Function and voltage supply for the Fuel Pump is OK.
‹› Fuel tank at least 1/4 filled.
‹› Ignition switched off.
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check
CAUTION!
Fuel system is under pressure! Before opening the system, place rags around the connection area. Then release the pressure by carefully
loosening the connection.
Start diagnosis
-
Disconnect fuel supply line - 3 - at the supply location and catch any fuel coming out with a shop towel