Genuine Mazda 6 Coolant Temperature Sensor

The Mazda 6 Coolant Temperature Sensor is an electronic thermistor. The device consists of an electronic thermistor that is installed in a threaded coolant passage that comes into direct contact with the engine coolant. In turn, this allows the device to relay real-time engine operating temperature information to the Mazda engine control module. The sensor acts as a negative temperature coefficient device wherein the electrical resistance decreases with the rise of the coolant temperature. The module in the Mazda engine control serves a signal of five volts. The changing resistance of the sensor trims the return voltage. The module uses the returned value to compute the temperature of the coolant. The Coolant Temperature Sensor is applied by Mazda systems in the 6. The control module expands the injector pulse duration to enrich the mixture during cold starts based on these readings. The duration is then shortened as the engine warms. It also increases idle speed when the engine is cold to prevent stalling. It also turns the radiator fan on and off as necessary. The information regarding temperature from the Coolant Temperature Sensor data controls the operation of certain systems that may only work after warm-up, including the exhaust gas recirculation, the evaporative emission purge valve, and the torque converter clutch to avoid rough running or stalling during cold-weather operation. As some cooling components require a high current to work, these components are connected through relays instead of being connected directly to the battery. The sensor data initiates these relay actions to avoid overloading the electrical circuits. The threaded mount keeps the component steady, while immersion in coolant enables accurate readings that help the Mazda 6 engine not to overheat.

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