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Home >> Volkswagen >> 2008 >> Eos VR6, CBRA >> Repair and Diagnosis >> Engine Performance >> System >> 3.2L - Generic Scan Tool - Engine Code(S): CBRA >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Fuel Pump Checking
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Fuel Pump Checking

Special tools and workshop equipment required 

Test conditions 

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
GWWA20-1206Courtesy of VOLKSWAGEN UNITED STATES, 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
GWWN20-10221Courtesy of VOLKSWAGEN UNITED STATES, 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.

Fig 3: A Jumper Cable From A Electrical Connector Test Lead Set Connected To Terminal Of The Fuel Delivery Unit And To Vehicle Ground
GWWA20-1120Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

NOTE:

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

-- 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
GWWA20-0477Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Using a multimeter, check the electrical circuit between terminals 1 and 5 of the fuel delivery unit for resistance.

Specified value: 03 to 1.5 ohms.

If the specified value was Not obtained, replace the Fuel Delivery Unit.

-- If the specified value was obtained, check the electrical harness for power and ground supply to the fuel pump. Note that the fuel pump is not supplied continuous power when the engine is not running. Refer to the appropriate SYSTEM WIRING DIAGRAMS information.

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 .
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