SW2 L4-1.9L DOHC VIN 7 (1997)
Transmission Speed Sensor: Description and Operation
The transaxle Turbine Shaft Speed (TSS) sensor is a Permanent Magnet (PM) generator mounted near the pressure filter on the transaxle case. The
sensor produces a pulsing voltage whenever turbine shaft speed is above 250 rpm. These pulses occur eight times per each turbine shaft revolution and
are translated to provide turbine shaft speed in rpm.
The PCM uses transaxle turbine shaft speed sensor to compare engine rpm and vehicle speed. By comparing the turbine shaft speed, the PCM can
accurately identify inaccurate ratios due to clutch slippage, lack of pressure, etc.
