Characteristic curve and setpoint values
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 electrical voltage at the resistor is dependent on the coolant temperature. A table that specifies the temperature associated with each voltage value is stored in the engine control. This compensates for the non-linear relationship between electrical voltage and temperature.
Typical characteristic curve
| Item | Explanation |
|---|---|
| 1 | Voltage |
| 2 | Characteristic curve for hot conductor (NTC) |
| 3 | Temperature |
Please note the following setpoint values for the coolant temperature:
| Variable | Value |
|---|---|
| Voltage range | 4.9 to 5.1 V |
| Signal voltage | approx. 0.2 to 3.3 V |
| Response time | 15 s |
| Temperature resolution | ±1 °C |
| Maximum power consumption | 20 mA |
| Temperature range | -40 °C to 150 °C |