Atmospheric pressure sensor (539), T8: Connection

CONNECTOR PINOUTS REFERENCE

Pin No.	Signal type	Description
1	Power supply, 5 V	Connected to ECM pin 42(A).
2	Ground	Connected to ECM pin 30(A).
3	Signal	Connected to ECM pin 8(A).

Fig 1: Identifying Communication Flow - Atmospheric Pressure Sensor (T8)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Circuit Diagram - Atmospheric Pressure Sensor (T8)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The electronics in the sensor are semiconductive and are mounted on a chip that bends with changes in air pressure, thus allowing more or less voltage to pass depending on the outside air pressure.