Structure and inner electrical connection
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The sensor is operated with a voltage of 12 Volts. The intake air temperature sensor is supplied with 5 Volts by the engine control.
Evaluation electronics evaluate the measured data in the hot film air mass meter. This enables exact detection of the air mass flowing through, including the direction of flow. The sensor element only detects part of the air mass flow. The total air mass flowing through the measuring tube is determined on the basis of a calibration.
| Item | Explanation |
|---|---|
| 1 | Hot film air mass meter |
| 2 | Evaluation electronics |
| 3 | Intake air temperature sensor |
PIN REFERENCE
| Pin | Explanation |
|---|---|
| Terminal 15N | Terminal 15N, supply voltage |
| SIG1 | Analogue intake air temperature signal |
| SIG2 | Air mass signal |
| Terminal 31E | Terminal 31, electronics earth (ground) |
| SIG3 | Digital intake air temperature signal |