Fuel Pump (FP) check-valve, checking
WARNING: This page is about a different variant/trim than selected.
Test requirements
- V.A.G 1348/3A remote control is still connected.
- V.A.G 1318 pressure gauge is still connected.
Test sequence
NOTE:
This test also checks the connections of the fuel supply line from Fuel Pump (FP) unit to connection point of pressure gauge for proper seal.
- Close pressure gauge shut-off valve (lever perpendicular to direction of flow -position B-).
- Operate remote control in short intervals until a positive pressure of
approx. 3 bar
has built up.
- If excess pressure is built up, reduce pressure by carefully opening shut-off valve.
WARNING:
Danger of spray when opening shut-off valve. Hold container in front of free connection on pressure gauge.
- Observe pressure drop on pressure gauge. Pressure must not fall below
2.5 bar
after 10 minutes.
If pressure drops further:
- Check line connections for proper seal.
If no malfunctions are found in wires:
- Fuel Pump (FP) malfunctioning, replace Fuel Pump (FP) unit. Refer to Fuel Pump (FP) unit, removing and installing , Fuel Pump (FP) unit, removing and installing.
- Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
- Generate readiness code. Refer to Readiness code, generating