Fuel Pump, Checking

Special tools and workshop equipment required 

• Hand held remote control (jumper).
• Multimeter.
• Electrical connector test lead set.

Test conditions

• Battery voltage 12.5 V.
• Fuse -SB6- OK.
• Fuel filter OK.
• Ignition switched off.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

-- Remove the rear seat bench. Refer to Rear Seats .

-- Remove cover retainers -arrows- from the right sealing flange.

Fig 1: Identifying Cover From Fuel Delivery Unit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Disconnect the electrical harness connector -1- from the fuel delivery unit.

Fig 2: Disconnecting 5-Pin Connector, Black Supply Line And Blue Return Line

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect a Hand held remote control (jumper) to terminal -1- of the fuel delivery unit and to vehicle battery (+).

-- Connect a jumper cable from an Electrical connector test lead set to terminal -5- of the fuel delivery unit and to vehicle Ground (GND).

Fig 3: A Jumper Cable From A Electrical Connector Test Lead Set Connected To Terminal Of The Fuel Delivery Unit And To Vehicle Ground

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Press switch on the Hand held remote control (jumper).

-- Listen for an operating noise from the fuel pump.

If no operating noise is heard:

Fig 4: Checking Electrical Circuit Between Terminals And Of Fuel Delivery Unit For Resistance

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the fuel delivery unit.

-- Using a Multimeter, check the electrical circuit between terminals 1 and 1 of the fuel delivery unit for resistance.

Specified value: 0 ohms.

Final procedures

After repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .

End of diagnosis