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Home >> BMW >> 2019 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 575 (Functional Descriptions - F25 - Cooling System, Engine Performance) >> Engine Performance - Functional Description >> Charging pressure control >> Component overview >> Charge-air temperature sensor

Charge-air temperature sensor

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The charge-air temperature sensor detects the temperature of the intake air compressed by the turbocharger and cooled by the charge-air cooler.

The charge-air temperature sensor is located on the charge-air pipe between the charge-air cooler and the throttle valve.

The DDE control unit detects the of the charge-air temperature by the variable impedance of the sensor.

The following table shows the resistance characteristics of the charge-air temperature sensor:

Charge air temperature Resistance
-20 °C 21.8 kOhm
0 °C 7.35 kOhm
20 °C 2.8 kOhm
40 °C 1.2 kOhm
60 °C 560.1 Ohm
80 °C 282, 9 Ohm
100 °C 152.9 Ohm