Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
This DTC is output when failure of the door key lock and unlock switch circuit is detected.
The door key lock and unlock switch is built in the door key cylinder.
When the key is turned to the lock side, terminal KL of the switch is grounded and when the key is turned to the unlock side, terminal KUL of the switch is grounded.