Toyota Yaris: How to Arm the System / To Turn Off an Armed System

Toyota Yaris XP210 (2020-2025) Owner's Manual / Before Driving / Security System / How to Arm the System / To Turn Off an Armed System

An armed system can be turned off using any one of the following methods:

Pressing the unlock button on the smart key.
Starting the engine with the push button start.
With the advanced keyless function:
Pressing a request switch on the doors.

The hazard warning lights will flash twice.

When the doors are unlocked by pressing the unlock button on the smart key while the theft deterrent system is turned off, the hazard warning lights will flash twice to indicate that the system is turned off.

How to Arm the System

Close the windows securely. Switch the ignition OFF. Make sure the hood, the doors, and the liftgate/trunk lid are closed. Press the lock button on the smart key or lock the driver’s door from the outside with the auxiliary key...

To Stop the Alarm

A triggered alarm can be turned off using any one of the following methods: Pressing the unlock button or the trunk button (4-door) on the smart key...

Other information:

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Components

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Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Power Source Control System Missing Message (B278C87)

DESCRIPTION When an internal malfunction is detected in the certification ECU (smart key ECU assembly), this DTC is stored. DTC No. Detection Item DTC Detection Condition Trouble Area B278C87 Power Source Control System Missing Message An internal malfunction occurs in the certification ECU (smart key ECU assembly)...