Faulty Odometer Granvia Yr 2000

[kaczk]

I have recently bought a granvia but the digital mileage display is not working. It simply states 51 10, when the trip is pressed it changes from 51 10 to 51 15. I have taken the car to a specialist who took the dash out and tested it on the bench were it worked. Having spoken with my Toyota dealer he has suggested that if it is not the digital display thats faulty then it may be the speed sensor in the gearbox. I cannot understand how it may be the speed sensor as the speedo is working and show the correct speed.

Any help would be appriciated as this is driving me nuts (not to mention the other half)

Thanks