Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Land Cruiser, 2002 Lexus LX 470, 2001 Toyota Land Cruiser, and 2001 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
ECM uses signals from throttle position sensor, air flow 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 solenoid, valve body and torque converter. DTC is set when TCC lock-up does not occur at appropriate speed (50 MPH), or lock-up does not release at appropriate speed. Possible causes are:
- SL solenoid is stuck open or closed.
- Valve body clogged or valve stuck.
- TCC malfunction.