Thanks to @umarkhan1 for sending IAT sensor of Toyota engine.
I connected it with wires in my car, now showing temperature of 9c on display, while actual was about 29c at the time.
It looks like not to be matching with calibration of Pajero Mini system.
I will continue my search for the correct sensor.
FYI, if wires are shorted, the reading on display changes to E5 from E0.