Temp. Sensor Operating Voltage., At what range does it operate?

[Damien89]

Hi i am new here,
The temp. sensor that is fitted to the thermostat housing that sends the signal to the dash temp. gauge, at what voltage does it operate when cold and when hot?
Vehicle is a 1995 Toyota hilux pick up with the 2L-TE engine

Thanks
Damien

 

[pappy]

12 volts (assuming you don't have a 24V diesel). What you want to know is resistance.

• 60°C (140°F) = 146.6 Ohms (+26.5, -4.0)
• 115°C (239°F) = 24.3 Ohms (+1.3, -1.8)

These are the specs for a gas engine. I'm guessing Toyota was consistent across all models.

You might want to invest in a factory service manual. Expensive? Yes. Invaluable? Absolutely.

 

[Damien89]

12 volts (assuming you don't have a 24V diesel). What you want to know is resistance.

• 60°C (140°F) = 146.6 Ohms (+26.5, -4.0)
• 115°C (239°F) = 24.3 Ohms (+1.3, -1.8)

These are the specs for a gas engine. I'm guessing Toyota was consistent across all models.

You might want to invest in a factory service manual. Expensive? Yes. Invaluable? Absolutely.

So the sensor works between 0-12 volts across the range?
for the service manual were do i find one? Iv'e been searching the net for ages but haven't managed to find one for the 2L-TE. Do you know were i can find one?

 

[pappy]

No it works at 12 volts. The resistance changes, not the voltage. Consider the temperature gauge to be a simple ohm meter. At high temperature the resistance is low. At low temperature the resistance is high. Power is applied from the gauge to the sender, and the gauge reads the resistance across the sender.

 

[2ndGenToyotaFan]

Welcome to MUD!!! Glad to have you! Check the FAQ thread here, and look through the FSM links. There may be a 2L-TE manual available online... IF not, keep checking Ebay....