Sensor Voltage levels, CLT sensor

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Sensor Voltage levels, CLT sensor by newfie

Started on	: 02-18-2003 08:42 PM
Replies	: 5
Last post by	: avengador1 on 02-19-2003 09:16 AM

newfie
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Report this Post02-18-2003 08:42 PM

I don't think my temperature sensor is working since the gauge never moves. I was wonderin exactly how it worked. I know that its just a resistor that varies with temperature but doesn't the ECU need a voltage signal as an input. I can't see how a resistance can be an input. so how does the gauge work? Any EE's out there give me a clue?

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Report this Post02-18-2003 10:22 PM

CLT? Do you mean CTS? Coolant Temperature Sensor?

The sensor is a temperature variable resistor as one leg of voltage divider. As the resistance changes, the center of the divider changes voltage. Send that to an 8 bit A/D converter, look up the voltage in a table (it isn't linear) and you have the temperature.

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