Ambient Temperature Sensor

[Irondave5110]

Morning all. The ambient temperature sensor on my wifes 2003 Corolla is reading minus 30. I have fitted a brand new sensor, There is 5 volts going to the sensor, I have disconnected the Battery. But no luck. Can any body give me any guidance or tips please.

[oldcodger]

Hi,

Cannot find much in the way of wiring details for that sensor and not sure if its on a similar display to my later dgital display panel ?

Assume the cable has just 2 wires ?

The voltage reading may be misleading, the way to test the sensors , is to ideal bring them inside for 30 mins so they are in a temp of around 20c + , and then measure between the two connector pins with your resistance meter, it should measure( Haynes manual data)  about 1.6k ohms to 1.8k ohms at 25c, so at 20c ( typical room temp) the resistance ( if a NTC)  will probably be a bit lower.

Would compare with your old one and see if that is different ?

[Irondave5110]

Thank you Oldcodger for your reply. Yes it is a two wire sensor. I shall investigate further.