The sensor works using a 5V reference which is effected by the resistance. When cold the resistance is high, there it will send a reading of around 0.5v to the ECU. As the coolant warms up the resistance drops. So you'll get a reading of around 4.5 to 5V when at operating temperature. This graph shows that the ECT sensor drops in resistance as it warms up, this will affect the output signal.
Monday, August 30, 2010
Engine Coolant Temperature
The sensor works using a 5V reference which is effected by the resistance. When cold the resistance is high, there it will send a reading of around 0.5v to the ECU. As the coolant warms up the resistance drops. So you'll get a reading of around 4.5 to 5V when at operating temperature. This graph shows that the ECT sensor drops in resistance as it warms up, this will affect the output signal.
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were does the ECU read this signal is it a return or before it gets to this sensor. what type of sensor is this?
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