HOLDEN GEN III V8, Service Training

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GEN III V8 ENGINE MANAGEMENT
The signal that is sent from the MAF sensor is sent
in the form of a frequency output. A large quantity
of air passing through the sensor (such as when
accelerating) will be indicated as a high frequency
output. A small quantity of air passing through the
sensor will be indicated as a low frequency output
(such as when decelerating or at idle). The Tech 2
scan tool displays MAF sensor information in
frequency, and in grams per second. At idle the
readings should be low and increase with engine
RPM.
If a problem occurs in the MAF sensor circuit, the
PCM will store a DTC in its memory. The PCM will
turn on the Check Powertrain Lamp, indicating
there is a problem. If this occurs, the PCM will
calculate a substitute mass air flow signal based on
speed density RPM, MAP and IAT.
No field service adjustment is necessary or
possible with this MAF sensor.
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