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Home >> Volkswagen >> 2017 >> Jetta GLI, Automatic DCT Trans >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Fuel Supply System (Service Information - Gasoline Engines - CNLA, CPLA, CPPA, CPKA, CPRA, CBPA, CZTA) >> 20 Fuel Supply >> Fuel Pump >> Transfer Fuel Pump -G6-, CHECKING >> FUEL PUMPS, CHECKING FUNCTION AND POWER SUPPLY, VEHICLES WITHOUT Fuel Pump Control Module -J538- >> Test Sequence:

Test Sequence:

NOTE:

The output diagnostic test mode checks the fuel pump function.

-- Pay attention to all safety precautions. Refer to SAFETY PRECAUTIONS .

-- Follow the guidelines for clean working conditions. Refer to PARKING/AUXILIARY HEATER AND FUEL SYSTEM CLEAN WORKING CONDITIONS .

-- Connect the Vehicle Diagnostic Tester -1- as follows:

GWWN01-0590Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the diagnostic cable connector -2- to the diagnostic connection inside the driver footwell.

-- Switch the ignition on.

-- Touch the screen buttons on the display one after the other.

The fuel pump must now accelerate slowly up to the maximum RPM.

NOTE:

The fuel pump runs very quietly.

-- Switch off the ignition.

If The Fuel Pump Does Not Start: 

-- Fold up the bench seat. Refer to REAR SEATS .

GWWA20-10835Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Unclip the cover -1- at the tabs -arrows- using the :3409  .

-- Pull on the connector -arrow- without pressing the release to make sure the connection is secure.

GWWN20-10623Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Repeat the fuel pump function test if the connector was not connected correctly. Refer to TEST SEQUENCE: .

Fuel Pump Runs Without Function: 

-- Release and disconnect the connector -arrow-.

-- Check the contacts on the connector and on the fuel delivery unit for damage.

-- Connect the :VAS5565  to the connector and to the fuel delivery unit.

GWWN20-10423Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the :FLU83III  to the wires -1- and -5- for the :VAS5565  .

-- Re-initiate the output diagnostic test mode and measure the voltage on the fuel pump. Refer to TEST SEQUENCE: .

If The Specified Value Is Not Obtained: 

-- Locate and repair the open circuit according to the wiring diagram. Refer to the appropriate WIRING DIAGRAMs, Troubleshooting & Component locations.

If The Specified Value Is Obtained: 

-- Remove the fuel lines -1- and -2- from the flange. Disconnect the connector couplings. Refer to CONNECTOR COUPLINGS .

GWWN20-10624Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
CAUTION:

The fuel system is under pressure.

Risk of injury from fuel spraying out.

  • Wear protective eyewear.
  • Wear safety gloves.
  • Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

Vehicles With Parking Heater: 

-- If the vehicle has an auxiliary heater, then disconnect the connector and the fuel line from the Metering Pump -V54-. Disconnect the connector couplings. Refer to CONNECTOR COUPLINGS .

Continuation For All Vehicles: 

-- Drain the fuel tank. Refer to FUEL TANK, DRAINING .

GWWN20-10625Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the locking ring using the :T10202  .

-- Lift up the cover -3- for the fuel delivery unit.

GWWA20-11013Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Check if the wiring between the flange and fuel pump is connected.

-- Inspect the contacts for damage.

If There Are No Open Circuits Found: 

-- If the fuel pump is faulty, replace the fuel delivery unit. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .

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