Automatic Transmission Input Speed Sensor (A/T ISS) (44)
WARNING: This page is about a different variant/trim than selected.
The A/T ISS operates identically to the A/T OSS sensor except that is uses the stamped teeth on the reverse clutch input housing assembly (401) as the rotor reluctor. Remember that the reverse clutch input housing assembly is driven at converter turbine speed. The A/T ISS square wave pattern is also compared to a fixed clock signal internal to the TCM to determine actual converter turbine speed. The TCM uses transmission input and output speeds to help determine line pressure, transmission shift patterns, TCC apply pressure, gear ratios, and TCC slippage for diagnostic purposes.