Jetta GLX Wagon V6-2.8L (AFP) (2001)
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Operate remote control. Slowly close shut-off valve until on pressure gauge 3 bar is indicated. Do not change position of shut-off valve any more.
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Empty measuring container.
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Delivery rate of Fuel Pump (FP) is dependent on battery voltage. Therefore, connect multimeter to vehicle battery using adapter cables.
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Operate remote control 30 seconds long and measure battery voltage.
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Compare fuel quantity pumped with specified value.
*) Minimum delivery rate cu.cm/30 s
**) Voltage at fuel pump with engine off and pump running (approx. 2 volts less than battery voltage).
Read-out example:
During test, a voltage of 12.2 volts is measured at battery. Since the voltage at the pump is approx. 2 volts less than battery voltage, there is a minimum
delivery rate of 200 cu.cm/30 s.
If minimum delivery rate is not obtained:
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Check fuel lines for possible restrictions (kinks) or clogging.
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Disconnect supply line -1- from fuel filter input.
NOTE: Depress buttons on hose connections to do so.
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Connect pressure gauge (VAG1318) with adapter (1318/17) to hose.
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Repeat test of delivery quantity.
If minimum delivery rate is obtained now:
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Replace fuel filter.
If minimum delivery rate is still not obtained:
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Remove Fuel Pump (FP) unit and check filter strainer for dirt.
Only if no malfunctions have been found yet:
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Fuel Pump (FP) faulty, replace Fuel Pump (FP), see Fuel Pump (FP), removing and installing.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
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Generate readiness code.
See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Delivery rate has been obtained, but malfunctions are still suspected in the fuel supply (e.g. sporadic loss of fuel supply):