Location
The coolant outlet temperature sensor (B606) is located on the front side of the coolant manifold which is on the right side of engine between the cylinder head and the exhaust gas recirculation cooler.
Shown on engine 471.9, engine version Euro VI Standard |
B606 | Exhaust coolant temperature sensor |
W07.04-1078-06
Task
The coolant outlet temperature sensor (B606) enables the engine management (MCM) control unit (A4) to determine the current coolant temperature at the engine outlet.
Structure
There is an NTC resistor inside the exhaust coolant temperature sensor (B606). NTC stands for "Negative Temperature Coefficient", which means that electrical resistance falls as temperature rises.
Function
The coolant at the exhaust coolant temperature sensor (B606) influences the temperature measuring element inside the sensor depending on its temperature and thus the size of the electrical resistance. The engine management control unit (MCM) (A4) derives the associated temperature from the electrical resistance.