Coolant temperature sensor (G 62) (Skoda Octavia 1U)

The coolant temperature sensor is a thermistor with negative TC resistance and is installed in the thermostat housing. Each coolant temperature corresponds to a certain resistance value, transmitted to the control unit in the form of a voltage signal.

Coolant temperature information is used as a correction factor for many system functions processed by the control unit (makes adjustments to the ignition timing and injection duration, to the idle speed of a cold engine). Some functions of the system are controlled depending on the coolant temperature (detonation control, lambda regulation, ventilation through a tank with activated carbon). In the absence of a signal, the control unit takes a signal from the air temperature sensor at the next engine start and this temperature subsequently increases. The highest substituted temperature is 87°C.