Turbine Shaft Speed Sensor
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Turbine shaft speed sensor may also be know as Input Shaft Speed (ISS) sensor.
Turbine Shaft Speed (TSS) sensor is a magnetic pickup that sends turbine shaft speed signal to the PCM. Malfunction of sensor may cause harsh engagements of shifts, no 4th gear or no engine braking in 2nd or 3rd gear.