Test Sequence

WARNING: This page is about a different car, the 2016 Volkswagen Beetle, 2015 Volkswagen Beetle, 2014 Volkswagen Beetle, and 2013 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

-- Activate the fuel pump with output diagnostic test mode to build fuel pressure.

NOTE:

The fuel pump now activates to build up the fuel pressure.

If the output diagnostic test mode is performed several times after another it is necessary to briefly start the motor before repeating the output diagnostic test mode.

-- Read the fuel pressure on the pressure gauge.

Specified Value: ≥ 4 bar (58 psi)

-- End the On Board Diagnostics (OBD) and turn off the ignition.

Observe the pressure drop on the pressure gauge. After 10 minutes the pressure must not drop more than approximately 1.0 bar (14.5 psi)

If the pressure drops

-- Check all the fuel lines for leaks and damage.

If No Faults Can Be Found

Fig 1: Identifying Shut-Off Valves A And B On Pressure Tester Kit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Make sure that the drain valve -C- on the Pressure Tester (Diesel) -1- is shut.

-- The shut-off valves -A and B- on the Pressure Tester Kit -1- are opened.

-- Activate the fuel pump with output diagnostic test mode to build fuel pressure.

-- Close the shut-off valve -B- on the pressure gauge immediately after the pressure has been reached. The lever is perpendicular to the direction of flow.

If the Pressure Drops Again (Leak on fuel tank side):

Proceed as follows to check the fuel filter residual pressure. Refer to RESIDUAL PRESSURE, CHECKING .