Intake air sensor (688), EDC16
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Intake air sensor (688), EDC16
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Intake air sensor (688)
The sensor measures the prevailing absolute pressure and temperature in the charge air pipe.
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
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Pin No.
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Signal type
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Description
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1
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Ground
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Connected to ECM pin 23(A)
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2
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Temperature signal
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Connected to ECM pin 53(A)
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3
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Power supply, 5 V
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Connected to ECM pin 13(A)
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4
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Pressure signal
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Connected to ECM pin 40(A)
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Function, pressure sensor
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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).
