Description & Operation

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

All doors can be locked or unlocked simultaneously from either front door. Turning driver door key lock switch once will unlock driver door only, and turning it twice will unlock all doors. Turning front passenger door key lock switch once will unlock all doors. Turning front passenger door key lock switch twice has no function. Door locks can be controlled by switches on driver or front passenger doors within vehicle, or by operating each door lock with key or lock knob. Front doors cannot be manually locked when key is in ignition switch.

Power door lock system is part of the multiplex communication network. The body control electronic control unit (ECU) is primary unit responsible for overseeing the operation of all power door locks. The driver door electronic control unit (ECU) controls driver door power door lock, as well as, limited control over all other power door locks. The front passenger door electronic control unit (ECU) has limited control for front passenger door power door lock.

Power door lock system consists of body control ECU, driver door ECU, front passenger door ECU, front door lock assemblies and rear door lock assemblies. See Figure. The driver door ECU consists of the power door lock switch and power window switches. The front passenger door ECU consists of the power door lock switch and power window switch. The front door lock assemblies incorporate door lock motor, door unlock detection switch and door key lock and unlock switch. The rear door lock assemblies incorporate door lock motor and door unlock detection switch.