Diagnosis of Ambient Pressure Sensor
Diagnosis of Ambient Pressure SensorGeneral 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
