Test Sequence:

WARNING: This page is about a different car, the 2018 Volkswagen Jetta, 2017 Volkswagen Jetta, 2016 Volkswagen Jetta, and 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

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:

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-- 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.

OBD
Engine Electronics
Output Diagnostic Test Mode
Electric Fuel Pump
[→]
Button

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 .

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-- 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.

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-- 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.

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-- 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: .

Specified value: approximately battery voltage

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 .

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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 .

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-- Open the locking ring using the :T10202 .

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

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-- 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 .