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Intake air sensor (688), EDC16

Intake air sensor (688), EDC16

Location

Intake air sensor (688)

Main task

The sensor measures the prevailing absolute pressure and temperature in the charge air pipe.

Type

The sensor is a combined pressure and temperature sensor. The pressure sensor is of piezo-resistive type with integrated signal amplifier. The temperature sensor is of NTC type.

Technical data


Connection

Pin No. Signal type Description
1 Ground Connected to ECM pin 23(A)
2 Temperature signal Connected to ECM pin 53(A)
3 Power supply, 5 V Connected to ECM pin 13(A)
4 Pressure signal Connected to ECM pin 40(A)



Function, pressure sensor

The pressure sensor capacitance between the metal plating of the discs is changed based on the pressure. A circuit integrated in the sensor converts the capacitance to an analogue voltage.

Based on the pressure in the charge air pipe, the pressure sensor yields a proportional voltage to control module pin 40(A).