911 Targa (996) F6-3.6L (2004)
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Absolute Pressure Sensor: Testing and Inspection
Diagnosis Of Ambient Pressure Sensor
General Description
The diagnostic function observes the signal from the ambient pressure sensor for naturally aspirated engines without using a manifold pressure sensor.
The voltage of the ambient pressure sensor is measured and the ambient pressure is calculated by using a offset and a gradient.
Range Check of Ambient Pressure
If the voltage remains under a threshold and the ambient pressure remains under a threshold for a given period an ambient pressure sensor at minimum
fault is assumed.
If the voltage exceeds a specified threshold or the ambient pressure exceeds a threshold for a given period an ambient pressure sensor at maximum fault
is assumed.
Diagnosis of Ambient Pressure Sensor
