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.
SL solenoid is turned on and off by signals from ECM to control hydraulic pressure affecting lock-up relay valve. Lock-up relay valve controls operation of TCC. If ECM detects a malfunction, fail-safe function is enabled. DTC is set and TCC is disabled when an open or short circuit occurs. Possible causes are:
- SL solenoid open or short circuit.
- SL solenoid malfunction.
- ECM malfunction.