Engine Cooling

Engine Cooling MSS65

Functional description, see BMW Service Technology:
TIS -> Document -> SI Technology -> Enter SBT Number
SBT number:
- 11 04 04 097

Overview of functions
The engine cooling works according to the crossflow principle with a horizontally split radiator. The electric fan is monitored and activated by the DME.

Two sensors report the coolant temperatures to the DME:
- Coolant-temperature sensor
- Temperature sensor on the radiator outlet

The two sensors are monitored by the DME; corresponding faults are entered in the diagnostic fault code memory.

The coolant thermostat is of conventional design and it opens as of a coolant temperature of 79 degree C. The thermostat is not activated by the DME. Via the course of the coolant temperature, the DME still recognizes if the thermostat remains open due to a defect after a cold start.