Fuel Pump (FP) check-valve, checking
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2006 Volkswagen GTI, 2005 Volkswagen Jetta, 2005 Volkswagen GTI, 2004 Volkswagen Jetta, and 2004 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
Test conditions
- Remote control V.A.G 1348/3A connected
- Fuel Inj. Pressure Gauge V.A.G 1318 is still connected.
Test sequence
NOTE:
- This test also checks the connections of the fuel supply line from fuel delivery unit to connection point of pressure gauge V.A.G 1318 for proper seal.
- Close pressure gauge V.A.G 1318 shut-off tap (lever at right angle to direction of flow position - B - ).
- Operate remote control at short intervals, until a pressure of approx. 3 bar has built up.
CAUTION:
Danger of spraying when opening shut-off valve; wear protective goggles and protective clothing to prevent injuries and contact with skin. Hold container in front of free connection of pressure measuring device V.A.G 1318.
- If pressure builds up too high, lower excess pressure by carefully opening shut-off tap.
- Watch pressure drop on gauge. After 10 minutes the pressure must not drop below a 2.5 bar decrease.
If pressure drops further:
- Check line connections for leaks.
If no fault is detected in wiring:
- Fuel Pump (FP) faulty, replace fuel delivery unit refer to Fuel delivery unit, removing and installing .
- Check DTC memory.
- Read readiness code.
- If DTC memory was cleared or engine control module disconnected from voltage supply, readiness code must be regenerated.