Circuit Description
WARNING: This page is about a different car, the 2002 Toyota ECHO, 2002 Toyota Celica, 2001 Toyota ECHO, and 2001 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
Input turbine speed sensor detects rotation speed of input shaft. By comparing input turbine speed sensor signal and vehicle speed sensor signal, ECM detects shift timing of gears and controls engine torque and hydraulic pressure in response to various conditions to ensure smooth transaxle shifting. DTC will set if ECM detects vehicle speed of 20 MPH or more, transaxle is in 2nd, 3rd or O/D gear, shift solenoids and PNP switch status is normal, input shaft speed is 300 RPM or less and output shaft speed is 1000 RPM or more. Possible causes:
- Open or short in speed sensor circuit.
- Input turbine speed sensor malfunction.
- ECM malfunction.