The key reminder warning buzzer sounds when the driver side door is opened while the ignition switch is ACC or off and the key is in the ignition key cylinder. The key reminder warning buzzer is activated when the main body ECU sends an unlock warning switch signal and front door courtesy light switch LH*1 or RH*2 signal to the combination meter.
When the driver side door is opened while the ignition switch is ACC or off and the key is in the ignition key cylinder, this system causes a buzzer to sound in order to warn the driver that the key has not been removed.