Passat L4-1.8L Turbo (AWM) (2004)
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Disconnect 4-pin connector -1- from Mass Air Flow (MAF) sensor -2-.
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Connect multimeter to terminals 1 + 3 of connector for voltage measurement.
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Switch ignition on.
Specified value: at least 11.5 V
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Switch ignition off.
If there is no voltage:
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Check wire connection from terminal 3 to Fuel Pump (FP) Relay -J17- according to wiring diagram.
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Check signal and ground wires
Vehicles with engine code ATW, AUG, AWM
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Disconnect 5-pin connector -1- from Mass Air Flow (MAF) sensor -2-.
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Connect multimeter to terminal 2 of connector and engine Ground (GND) for voltage measurement.
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Start engine, and let run at idle.
Specified value: 11 to 15 V
If there is no voltage:
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Switch ignition off.
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Check wire connection from terminal 2 to Fuel Pump (FP) Relay -J17- according to wiring diagram.