Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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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) wires of Mass Air Flow (MAF) sensor.
Checking signal and Ground wires of Mass Air Flow (MAF) Sensor
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Disconnect 5-pin connector from Mass Air Flow (MAF) Sensor -G70-with Intake Air Temperature (IAT) Sensor -G42- (-1-).
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Connect test box to control module wiring harness, connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
Terminal 3 + socket 27
Terminal 4 + socket 53
Terminal 5 + socket 29
Wire resistance: max. 1.5 Ohms
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinity Ohms
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles