Passat Sedan V6-3.6L (BLV) (2008)
‹› Holding the button - A - for 2 seconds switches on the illumination for 20 seconds.
‹› If the (VAS 6394/1) does not display 0 bar, set it back to zero, refer to the operating instructions.
Connect the vehicle diagnostic tester to the diagnostic connector.
Turn on the ignition.
Press the following buttons on the vehicle diagnostic tester screen one after another.
On Board Diagnosis (OBD) >
01 - Engine Electronics >
011 - Measured Values >
Select the measured value block 1 4 0 and confirm with the Q button.
Display field 3 shows the fuel pressure actual value as measured by the fuel pressure sensor.
Start the engine.
Compare the pressure displayed by the (VAS 6394/1) with the actual value displayed on the vehicle diagnostic tester.
‹› The pressures may have a maximum difference of 5 bar.
If the difference is greater than 5 bar, replace the fuel pressure sensor.
The (VAS 6394) is under high fuel pressure. Disconnect the connector from the fuel pressure sensor when the engine is running. This
reduces the pressure to approximately 6 bar. Turn off the ignition. Place a cloth around the fuel pressure sensor, then carefully loosen the
fuel pressure sensor to release the remaining pressure.
Repeat the test with the new fuel pressure sensor and compare both measured values.
If the measured value do not match again:
Perform a wiring test, refer to the vehicle diagnostic tester.