Fuel Pump, Checking Electrically, Vehicles With 3.0L (V6)/4.2L (V8) Engines Through 05/2010 And 6.0L (V12) Engine

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Special tools and workshop equipment required

Injection Rate Comparison Meter Kit - Remote CableVAG1348/3A with Injection Rate Kit - Remote Cable VAG1348/3-3.

Fig 1: Identifying Remote Control Connection V.A.G 1348/3A
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Analog/Digital Multimeter FLU83III

Fig 2: Analog/Digital Multimeter FLU83III
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Connector Test SetVAG1594D

Fig 3: Connector Test Set VAG1594D
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Procedure

Fig 4: Identifying Left Plenum Chamber Cover -1- Above E-Box

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Follow all test requirements, refer to TEST CONDITIONS .

-- Open the left plenum chamber cover -1- above the E-box.

-- Turn the quick-release fasteners -1, 3 and 4- counter-clockwise 90° -arrows-.

Fig 5: Turning Quick-Release Fasteners -1, 3 And 4- Counter-Clockwise 90Degrees -Arrows- To Remove Relay/Fuse Holder Cover -2-

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-- Remove the relay/fuse holder cover -2-.

-- Remove the fuses for both fuel pumps in the relay/fuse holder in the E-box on the left side of the plenum chamber. Refer to the appropriate Wiring Diagram.

Fig 6: Locating Relay And Fuse Carrier In Left E-Box Plenum Chamber

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-- Connect the Injection Rate Comparison Meter Kit - Remote Cable VAG1348/3A with Injection Rate Kit - Remote Cable VAG1348/3-3 to the left terminal -arrow 1- and -arrow 2- for the socket for both fuel pump fuses. Refer to the appropriate Wiring Diagram.

Fig 7: VAG1348/3A

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-- Release the clip and open the positive terminal pick-off cover -A-.

-- Connect alligator clip to positive terminal pick-off.

-- Press the switch on the remote control.

It must be possible to hear the operating sounds from both fuel pumps when near the fuel tank chambers.

Transfer Fuel Pump -G6-, Checking:

-- Disconnect the connector terminal -arrow 2- for the Injection Rate Kit - Remote Cable VAG1348/3-3.

-- Press the switch on the remote control.

It must be possible to hear the operating noise from the Transfer Fuel Pump - G6- when near the right fuel tank chamber.

Checking the Fuel Pump - G23- :

-- Disconnect the connector terminal -arrow 1- for the Injection Rate Kit - Remote Cable VAG1348/3-3.

-- Press the switch on the remote control.

It must be possible to hear the operating sounds from the Fuel Pump - G23- near the left fuel tank chamber.

NOTE:

The fuel pump runs very quietly. Avoid surrounding noises while testing the fuel pump.

All:

Fig 8: Checking Fuel Delivery Unit Electrical Terminals 1 To 4 For Continuity

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If you cannot hear any running noises, then remove that fuel delivery unit: Right RIGHT FUEL DELIVERY UNIT AND Transfer Fuel Pump -G6-, REMOVING AND INSTALLING , left LEFT FUEL DELIVERY UNIT AND Fuel Pump -G23-, REMOVING AND INSTALLING .

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

If no malfunction is detected in the wires, the fuel pump is faulty. Replace the fuel delivery unit.

-- Install the fuel delivery unit RIGHT FUEL DELIVERY UNIT AND Transfer Fuel Pump -G6-, REMOVING AND INSTALLING or LEFT FUEL DELIVERY UNIT AND Fuel Pump -G23-, REMOVING AND INSTALLING .