Define Coolant Temperature Indicator
|Explore Topics of Coolant Temperature Indicator
It is a device used to indicate the temperature of the coolant circulating around the engine.
The Coolant temperature indicator warns the driver about the excessive temperature of the coolant which can help identifying trouble with the engine or even a possible leak.
The Coolant temperature indicator may be a digital or a dial type indicator. Either will indicate the coolant temperature. The Temperature sensor is usually located in the engine block and extends into a coolant passage and detects the temperature of the coolant. The sensor then sends the signal to the ECU (Electronic Control Unit). In early models, it sent the signal directly to the gauge (Coolant Temperature indicator). The temperature measured is indicated on the panel in front of the driver. If the temperature is beyond the limits, the indicator alerts the driver not only by the gauge, but often by an additional light.
If the vehicle does not have a gauge, there will be a light that illuminates when the vehicle is about to overheat. When this light comes on, it means the vehicle has reached the temperature at which components are about to be damaged. It is commonly referred to as an "Idiot light" for that reason, because often, the vehicle is already overheating or boiling over, meaning the coolant has reached the pressurized boiling point.