Pressure sensor, intake manifold (431): Connection

PIN DESCRIPTION

Pin No.	Signal type	Description
1	Power supply, 5V	Connected to ECM pin 32(B).
2	Signal	Connected to ECM pin 12(B).
3	Ground	Connected to ECM pin 42(B).

Fig 1: Identifying Pressure Sensor, Intake Manifold (431) Functional Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Identifying Pressure Sensor, Intake Manifold (431) Circuit Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

A circuit integrated in the sensor converts the capacitance to an analogue voltage. The pressure sensor is secured in the engine's intake manifold after the throttle.

Based on the pressure in the intake manifold, the pressure sensor yields a proportional voltage to control module pin 12. At normal atmospheric pressure, 100 kPa, voltage from the sensor is approx. 2.1 V.