Monitor Description
WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
The TCM illuminates the MIL and stores the DTC if it detects that the ATF pressure switch is OFF with the lock-up solenoid ON or if it detects that the ATF pressure switch is ON with the lock-up solenoid OFF.