Accord 2000 temperature gauge not working

Hello;

I have a 2000 Honda Accord - V-Tech - 4Cyl - 2.3L - Engine Type: F23A1.
The temperature gauge in the dash board does not function. I was told the temperature sending unit must be changed. Can someone please tell me WHERE EXACTLY on the engine is this unit located..? Your advise greatly appreciated.

Best regards;

I do not have my Accord at home now but as far as I remember the sensor is located at the passenger side at the top of the engine.

Have you checked the wiring? From what I remember from the Haynes manual if you ground the lead the gauge suppose to show "Hot".

Good luck,
Sam