Circuit Description
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
The door key lock and unlock switch is built in the door key cylinder. When the key is turned to the lock side, terminal No. 3 of the switch is grounded and when the key is turned to the unlock side, terminal No. No. 2 of the switch is grounded. The door key lock and unlock switch can be checked using DTC check. See DTC B1222/22: DOOR LOCK SWITCH CIRCUIT (DRIVER) or DTC B1224/24: DOOR LOCK SWITCH CIRCUIT (PASSENGER) under DIAGNOSTIC TESTS under MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. For driver door key lock and unlock switch circuit diagram, see Fig 1. For passenger door key lock and unlock switch circuit diagram, see Fig 2.