GTI L4-2.0L (AEG) (2000)
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Disconnect 5-pin connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
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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: 11.0 to 15.0 V
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Switch ignition off.
If there is no voltage:
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Check wire between 5-pin connector terminal 2 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram. Wire resistance:
max: 1.5 Ohms
If voltage supply and wires are OK:
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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. 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