Motronic ME 7.1.1
Mass Air Flow (MAF) Sensor G70
The 6th generation hot film MAF sensor (HFM6)
is used in the 3.2L and the 3.6L FSI engine. It is
located in the intake manifold and operates based
on a thermal measurement principle, as did its
predecessor.
Connector
Characteristics
• Micromechanical sensor element with reverse
current detection
Sensor Electronics
• Signal processing with temperature compensation
• High measurement accuracy
• High sensor stability
Drawn-in Air
360_183
Signal Utilization
The signal from G70 is used in the ECM to calculate
the volumetric efficiency. Based on the volumetric
efficiency, and taking into consideration the lambda
value and ignition timing, the control module
calculates the engine torque.
Bypass Channel
Effects of Signal Failure
2.5L engines with codes CBTA and
CBUA are the new versions that now
utilizes a Manifold Absolute Pressure
(MAP) sensor and not a MAF sensor.
If the Mass Air Flow (MAF) Sensor G70 fails, the
engine management system calculates a substitute
value.
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