This is the one for the Nippon Denso coolant sensor as found in many many many Japanese engines and measured by me.
The OEM ECUs that use these sensors typically use a 2.7k (measured 2.685k) metal film 1% tolerance resistors as bias for them.
The sensor with the green plug is the coolant/engine temperature sensor for the ECU. The other one is for the gauge in many of these same vehicles.
![Image](http://i260.photobucket.com/albums/ii15/diyefi/CoolantAirSensorInfo/mazdaThermistorDensoTableCurve.jpg)
![Image](http://i260.photobucket.com/albums/ii15/diyefi/CoolantAirSensorInfo/NipponDensoCoolantTemeratureSensorE.jpg)
![Image](http://i260.photobucket.com/albums/ii15/diyefi/CoolantAirSensorInfo/NipponDensoCoolantTemeratureSensorA.jpg)
One sensor per post, brief description of origin and applications. Preferably a pic of the sensor too.
Fred.