LEMON Manuals: Even more car manuals for everyone
Home >> Volkswagen >> 2017 >> Passat R-Line >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Fuel Supply System (General & Service Information - CBTA, CBUA, CDVB, CPKA, CPRA, CCCA, DDSA, DDSB) >> 20 Fuel Supply >> Fuel Pump >> Transfer Fuel Pump -G6-, CHECKING >> Fuel Pressure, Checking >> Connect the vehicle diagnostic tester.

Connect the vehicle diagnostic tester.

-- Activate the fuel pump with the engine electronic with the output diagnostic test mode.

NOTE:

The fuel pump is now activated to build up the fuel pressure.

If the output diagnostic test mode is performed several times in succession, it may be necessary to briefly start the motor before repeating the output diagnostic test mode.

-- Read the fuel pressure on the pressure gauge.

Specified Value: 

Engine Code Fuel Pressure Specified Value
CDVB, CPKA, CPRA 4.0 to 7.0 bar (58.01 to 101.52 psi)
CBTA, CBUA, CCCA 3.5 and 4.5 bar (50.76 to 65.27 psi)

If the fuel pressure is OK, check the residual pressure. Refer to RESIDUAL PRESSURE, CHECKING .

If the Specified Value is Exceeded:

-- The pressure relief valve inside the fuel delivery unit flange is faulty.

NOTE:

The pressure relief valve and the fuel filter are integrated in the fuel delivery unit flange and cannot be replaced separately.

-- Replace the flange and fuel filter. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .

If the Specified Value Is Not Obtained:

scientia non olet · About LEMON Manuals