90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
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SELF DIAGNOSIS
The system does not check the plausibility of this sensor signal, but does use the signal as a reference to check the plausibility of the idle switch signal.
If the ECU detects a fault with the air mass sensor, the signal from the throttle valve potentiometer will be used instead, so that the vehicle can still be
driven until repairs are made.
