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volkswagen Workshop Repair Guides


Passat Sedan V6-3.6L (BLV) (2008)

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Delivery Rate, Checking > Page 2307

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Disconnect harness connector - 3 - from flange assembly of fuel delivery unit.

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Connect hand held remote starter (jumper) with adapter cables from connector test kit to terminal - 1(+) - of Fuel Pump and to terminal - 3(+) - of
harness connector of Fuel Pump Control Module (J538).

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Connect terminals - 4(-) - of harness connector and -  4(-) - of Fuel Pump using an adapter cable from connector test kit.

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Switch ignition on.

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Operate hand held remote starter (jumper) and observe display of pressure gauge while doing this.

Fuel pressure must increase up to a maximum pressure of 6 bar.

‹› When releasing control button of the hand held remote starter (jumper), fuel pressure decreases to approx. 5.6 bar.

If fuel pressure is OK, perform a Residual Pressure check. 

If specification is exceeded:

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Pressure relief valve in flange assembly is faulty, replace sender assembly. Refer to the Repair Information.

If specification is not obtained:

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Check fuel lines for possible restrictions (kinks) or blockages. 

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Check all fuel lines in fuel tank for leaks.

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Check fuel filter for leaks.

If no malfunction can be found:

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Replace flange assembly with pressure relief valve. Refer to the Repair Information.

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Repeat test.

If fuel pressure is not obtained again:

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Fuel Pump faulty, replace fuel delivery unit. Refer to the Repair Information.

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Delivery Rate, Checking > Page 2307

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