Motronic MED 9.1.1
Sensors
Intake Manifold Runner Position
Sensors G336 and G512
Intake Manifold Runner
Position Sensor 2 G512
The two intake manifold flap potentiometers are
secured to the intake manifold and are connected to
the shaft for the intake manifold flaps. They recognize
the position of the intake manifold flaps.
Signal Use
The position is important because intake manifold
changeover affects air flow in the combustion
chamber and the inlet air mass. The position of the
intake manifold flaps is therefore relevant to the
exhaust gas, and must be checked via self-diagnosis.
Effects of Signal Failure
If the signal from the position sensor fails, the
position of the intake manifold flaps at the time of
failure and the relevant ignition timing are used as
substitute values. Power and torque are reduced and
fuel consumption increases.
388_037
Intake Manifold Runner
Position Sensor G336
44
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