A4 Sedan V6-2.8L (AFC) (1996)
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Find short circuit or open circuit; repair as necessary.
MAF sensor connector
ECM connector A
terminal
terminal
1
A12
NOTE: If it becomes necessary to repair or replace any of the Mass Air Flow (MAF) sensor electrical terminals, ONLY replace with gold-plated
terminals
Checking function
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Slide back protective boot from back of MAF sensor connector (leaving it connected).
NOTE: The connector pin numbers are marked on the back of the connector itself.
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Switch multimeter (Fluke 83 or equivalent) to measure voltage and connect between terminal 2 (GND) and terminal 1 (B+) using jumper wires
from connector test kit VW 1594.
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Switch ignition ON.
Specified value: 0.3 to 1.1 volts
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Start engine and let idle.
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Switch off all electrical consumers (engine coolant fan should not run during measurement).
Continuously vary engine speed between idle and 4000 RPM.
Specified value: 1.5 volts minimum to 3.4 volts max. depending on engine speed (RPM)
If the specified value is not obtained:
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Replace Mass Air Flow (MAF) sensor.