Circuit Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The input shaft speed (ISS) sensor is a hall effect sensor. The ISS sensor mounts in the top of the transmission case. The ISS sensor faces the forward and direct clutch housing machined teeth surface. As the forward and direct clutch housing rotates, a square wave voltage signal is sent to the transmission control module (TCM). The number of pulses increases as the speed of the forward and direct clutch housing increases. The TCM uses the input shaft speed signal to help determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

If the TCM detects no input shaft speed when there is vehicle speed in a drive gear range, or if the TCM detects an open or shorted ISS signal circuit, then DTC P0717 sets. DTC P0717 is a type A DTC.