Circuit Description

WARNING: This page is about a different car, the 2002 Buick Regal, 2002 Buick Century, 2001 Buick Regal, and 2001 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The Input Shaft Speed (ISS) sensor is a permanent magnet with a coil of wire wound around it. The ISS sensor mounts in the case cover facing the reluctor wheel of the input shaft. As the reluctor wheel is driven by the turbine shaft, an AC signal is induced in the input speed sensor. Higher vehicle speeds induce a higher frequency and voltage at the sensor.

There is a fixed air gap between the sensor and the teeth on the sensor reluctor wheel. The ISS sensor input is used by the PCM to control line pressure, TCC apply and release, and transaxle shift patterns. This sensor is also used to calculate the appropriate gear ratios and TCC slippage.

This DTC indicates stuck, erratic, or intermittent conditions in the system.

If the PCM detects an unrealistically large change in the ISS sensor high signal in a short period of time, then DTC P0716 sets. DTC P0716 is a type "B" DTC.