Passat Sedan 4Motion W8-4.0L (BDP) (2002)
Terminal 1 + socket 26
Terminal 3 + socket 27
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: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If no malfunctions are found in wire:
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Measure resistance at Intake Air Temperature (IAT) Sensor -G42-, terminals 1 (signal) and 3 (Ground -GND-).
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Range A displays resistance values for the temperature range of 0...50 degrees C, range B displays resistance values for the temperature range of
50...100 degrees C
Read-out examples:
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30 degrees C is in range A and corresponds to a resistance of 1.5 to 2.0 k Ohms
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80 degrees C is in range B and corresponds to a resistance of 275 to 375 Ohms
If specified value is not obtained:
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Replace Mass Air Flow (MAF) Sensor-G70-, item 15 .
NOTE: The Intake Air Temperature (IAT) Sensor -G42-is a component of the Mass Air Flow (MAF) Sensor -G70- and cannot be replaced
individually.
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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: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If no malfunctions are detected in the wires and the resistance values are OK:
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Replace Motronic Engine Control Module (ECM) -J220-.