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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 >> Characteristic map thermostat >> Temperature profile and setpoint values

Temperature profile and setpoint values

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The engine control activates the heating element via a characteristic map depending on the current driving situation.

Fig 1: Heater Resistor Characteristic Curve
G09908718Courtesy of BMW OF NORTH AMERICA, INC.
Index# Explanation Item Explanation
1 Heater resistor not activated 2 Heater resistor activated
3 Time 4 Coolant temperature

Please note the following setpoint values for the coolant temperature:

Variable Value
Voltage range 9 to 16 volts
Opening temperature not heated 97 °C
Minimum stroke 8 mm
Minimum stroke in control range 4, 5 mm
Maximum output current 20 mA
Temperature range -40 °C to 150 °C