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.
ECM uses signal from vehicle speed sensor to determine actual gear position. ECM compares actual gear with shift schedule in ECM memory to detect mechanical trouble of solenoids and/or valve body. DTC is set if during normal driving, gear required by ECM does not match actual gear after 2 trips have been completed. Possible causes:
- No. 1 and/or No. 2 solenoid is stuck open or closed.
- Valve body is clogged or valve(s) is stuck.