Auto box error code, sensor location help


Registered User
My 2005 2.5tdi v6 avant has thrown an error code on the auto transmission (HEK), it is 01710 and is the input speed sensor no signal,
i have searched but cannot find the location of the sensor or any pictures of it. I hope its not in the end of the box where the ecu sits, i've had that part out and had it serviced.
Can anyone help with the location and possible a photo.
Thanks in advance.