A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
Specified value: 1.5 ohms max.
If the specification is not obtained:
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Check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminal 2 to Ground (GND) location in engine compartment left for
an open circuit, a short circuit to each other, Battery (+), and Ground (GND).
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If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
Checking electrical circuit
If the manufacturers test box is being used. Perform the following step.
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Install the test box. Refer to Fuel Injection and Ignition Repair Information
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] See: Powertrain Management/Computers
and Control Systems/Engine Control Module/Service and Repair.
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Using a multimeter, check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminal to the Engine Control Module (ECM)
(J623) electrical harness connector T94 terminal for resistance.