Circuit Description
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Sensor may also be referred to as NC revolution sensor.
Counter gear speed sensor detects rotation of counter drive gear. By comparing input turbine speed sensor signal and counter gear 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 OD gear, shift solenoids and PNP switch status is normal, and counter drive gear speed is less than 300 RPM. Possible causes are:
- Open or short in speed sensor circuit.
- Counter gear speed sensor malfunction.
- ECM malfunction.