Circuit Description
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
Taillight relay will be ON by operating the taillight switch (W/wireless door lock control system). The transistor which activates the taillight relay has two sorts: one is activated by the taillight switch for fail-safe and the is other is activated by CPU.