4 Runner 2WD V8-4.7L (2UZ-FE) (2003)
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Audible Warning Device: Description and Operation
Key Reminder
System Outline
Key Reminder System
With the ignition key inserted in the key cylinder (Unlock warning SW on), the ignition SW still off and driver's door open (Door courtesy SW on),
when a signal is input to TERMINAL (B) 23 of the body ECU, the body ECU operates, current flows from TERMINAL (C) 15 of the ECU to
TERMINAL (B) 19 of the combination meter to GROUND and key reminder buzzer sounds.