DTC P0717: Input/Turbine Speed Sensor Circuit No Signal: Reference
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Connect oscilloscope between "C51-1-10" (+) and "C51-1-11" (-) for J20 engine model ("C51-1-8" (+) and "C51-1-16" (-) for H25 engine model) of PCM connector connected to PCM and check input speed sensor signal.