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).
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