Manifold absolute pressure sensor (431)

Fig 1: Identifying Manifold Absolute Pressure Sensor

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Manifold Absolute Pressure Graph

Courtesy of SAAB-SCANIA OF AMERICA, INC.

TECHNICAL DATA - MANIFOLD ABSOLUTE PRESSURE SENSOR

Location		On stay between upper MacPherson strut attachment points
Power supply, pin B	V	5
Ground, pin A
Voltage at		Pin C
25 kPa (-0.75 bar)	V	approx. 0.9
50 kPa (-0.50 bar)	V	approx. 1.3
100 kPa (+/-0 bar)	V	approx. 2.1
125 kPa (0.25 bar)	V	approx. 2.5
150 kPa (0.50 bar)	V	approx. 2.9
175 kPa (0.75 bar)	V	approx. 3.3

Pressure specified in kPa refers to absolute pressure, i.e. 100 kPa corresponds to atmospheric pressure at sea level.

When checking the pressure sensor with a pressure/vacuum pump, slightly lower voltages may be obtained at high altitudes.