Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Avalon and 2001 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
ECM uses signals from airflow meter, TP sensor and crankshaft position sensor to monitor engagement of TCC lock-up. ECM compares engagement condition of TCC with lock-up schedule in ECM memory to detect mechanical trouble of SL solenoid, valve body, TCC and automatic transaxle. DTC is set when TCC lock-up does not occur when commanded, TCC lock-up does not release when commanded, or TCC is applied and transaxle clutch or brake slips or planetary gear component is broken or stripped. Possible causes are:
- SL solenoid is stuck open or closed.
- Valve body contaminated or valve stuck.
- TCC malfunction.
- Internal transaxle malfunction.