Circuit Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sequoia, 2002 Toyota 4Runner, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
ECM uses signals from throttle position sensor, airflow meter and crankshaft position sensor to monitor engagement of Torque Converter Clutch (TCC). ECM compares engagement condition of TCC with lock-up schedule in memory to detect mechanical trouble of lock-up solenoid, valve body and torque converter. DTC is set when TCC lock-up does not occur during appropriate speed, or lock-up does not release at appropriate speed. Possible causes are:
- Solenoid is stuck open or closed.
- Valve body clogged or valve stuck.
- TCC malfunction.