Jetta SportWagen L4-2.0L Turbo (CCTA) (2009)
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Start the engine and let it run at idle.
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Using a multimeter, check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminal 3 to engine Ground (GND).
Specified value: battery voltage.
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Switch the ignition off.
If the specified value was Not obtained:
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Remove the fuse 1 in Fuse Panel C. Check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminal 3 to Fuse 1 in Fuse Panel
C for an open circuit.
Specified value: 1.5 ohms max.
If the specified value was obtained:
Checking electrical circuit
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623).
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Using a multimeter, check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminals to the Motronic Engine Control Module
(ECM) (J623) electrical harness connector terminals for an open circuit.