Beetle L4-2.0L (AEG) (2000)
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Connect multimeter to terminal 4 of connector and engine Ground (GND) for voltage measurement.
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Switch ignition on. Specified value: at least 4.5 V
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Switch ignition off.
If there is no voltage:
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Check signal and Ground (GND) wire of Mass Air Flow (MAF) sensor.
Checking signal and Ground wires of Mass Air Flow (MAF) Sensor
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Connect test box to control module wiring harness, connect test box for wiring test. Engine Control Module (ECM) is not connected. See: Testing
and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
Vehicles with engine code AEG
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram. Terminal 3 + socket 12, Terminal 4 + socket 11,
Terminal 5 + socket 13: Wire resistance: max. 1.5 Ohms
Vehicles with engine code AVH, AZG, BDC
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram. Terminal 3 + test box socket 27, Terminal 4 + test
box socket 53, Terminal 5 + test box socket 29: Wire resistance: max. 1.5 Ohms
Continuation for all vehicles
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specified value: Infinite Ohms