New Beetle GL L4-2.0L (AZG) (2002)
Air Flow Meter/Sensor: Testing and Inspection
With Generic Scan Tool
Mass Air Flow (MAF) Sensor, Checking
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) sensor.
Recommended special tools and equipment
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VAG 1526 multimeter or VAG 1715 multimeter
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VAG 1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuse of Mass Air Flow (MAF) Sensor -G70- with Intake Air Temperature (IAT) Sensor -G42- must be OK.
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Fuel Pump (FP) Relay -J17- must be OK, check.
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Battery voltage must be at least 11.5 volts.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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For vehicles with automatic transmission, selector lever must be in position -P- or -N-.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Coolant temperature must be at least 80 degrees C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature.
Function test
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Connect diagnostic tester. See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan
Tool Connecting/With Generic Scan Tool/Diagnostic Tester, Connecting
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Start engine and let run at idle.
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Under address word 33, select "Diagnostic mode 1: Checking measured values."
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Select the measuring value "PID 16: Air flow quantity at Mass Air Flow (MAF) sensor".
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Check specified value of air flow quantity at Mass Air Flow (MAF) Sensor at idle. Specified value: 2.00 to 5.00 g/sec
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End diagnosis and switch ignition off.
If specified value is obtained, but DTC memory has a DTC concerning Mass Air Flow (MAF) sensor:
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Check voltage supply of Mass Air Flow (MAF) sensor.
If specified value is not obtained:
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Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor.
Voltage Supply For Mass Air Flow (MAF) Sensor, Checking
Vehicles with engine code AEG, AVH, AZG