Depending on the engine coding variant, the instrument cluster can determine the coolant temperature directly by means of a connected sensor or receive it from the engine control unit via the CAN bus.
The instrument cluster determines the current coolant temperature by way of the coolant temperature sensor (NTC resistor). The coolant temperature sensor is connected with a separate ground (analog ground) and a sensor line (analog positive) to the instrument cluster.
The instrument cluster makes available the "coolant temperature" information via the body bus (K-bus ) for other systems.