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.

-- 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.

-- In OBD, select fuel pump output diagnostic test mode.

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

NOTE:

The output diagnostic test mode checks the fuel pump function.

The fuel pump is now activated.

The fuel pump runs very quietly.

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.

-- Switch off the ignition.

If The Fuel Pump Does Not Start:

-- Remove the bench seat. Refer to REAR SEATS .

-- Pull on the connector on the Fuel Pump Control Module -J538- without pushing the locking mechanism to make sure it is secure. Repeat the fuel pump function test if the connector was not connected correctly. Refer to Test Sequence: .

Fuel Pump Runs Without Function:

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-- Release and remove the connector from the Fuel Pump Control Module -J538- -arrow-.

-- Check the contacts on the connector and on the Fuel Pump Control Module -J538- for damage.

-- Check the voltage supply between contacts -1 and 6- using the :FLU83III .

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Specified value: approximately battery voltage

Checking the Installation Position of the Ground Connection

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

Checking the Installation Position of the Ground Connection

-- Unclip the cover -1- at the tabs in direction of -arrows- using the Trim Removal Wedge :3409 .

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-- 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-.

Vehicles with EVAP Canister System Pressure Sensor -G804-.

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-- Release and disconnect the connector from the EVAP Canister System Pressure Sensor -G804- -1-.

Continuation For All Vehicles:

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

-- Check the wiring harness between the Fuel Pump Control Module -J538- and the fuel delivery unit. Refer to the appropriate WIRING DIAGRAMs, Troubleshooting & Component locations.

-- 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-.

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 the fuel delivery unit flange.

-- 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 .