Manifold Pressure/Vacuum Sensor: Description and Operation

GF07.04-P-6060AMG Component Description For The Pressure Sensor







The pressure sensor is located at the right front on variable intake manifold.

Task
The pressure sensor detects the absolute pressure in the intake pipe.

The intake manifold pressure serves the ME-SFI [ME] control unit (N3/10) to detect the air mass at a start. For a started engine signals from the left or right hot film mass air flow sensor (B2/6 or B2/7) are monitored.







Function
The intake manifold pressure deforms the membrane which acts on a potentiometer. This alters the resistance value of the potentiometer and influences the voltage signal in such a way that it serves the ME-SFI [ME] control unit as information about the intake manifold pressure.

The pressure sensor measuring range lies between 0.1 and 1.2 bar.

Example:
Intake manifold pressure Voltage signal
1.2 bar 4.5 V
0.8 bar 3.3 V
0.1 bar 0.5 V