The vehicle's keys have built-in transponder chips that prevent the engine from starting if a key has not been previously registered in the vehicle's on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prevent vehicle theft but does not guarantee absolute security against all vehicle thefts.
Vehicles without a smart key system: The indicator light flashes after the key has been removed from the engine switch to indicate that the system is operating.
The indicator light stops flashing after the registered key has been inserted into the engine switch to indicate that the system has been canceled.
Vehicles with a smart key system: The indicator light flashes after the engine switch has been turned off to indicate that the system is operating.
The indicator light stops flashing after the engine switch has been turned to ACCESSORY or IGNITION ON mode to indicate that the system has been canceled.

■System maintenance The vehicle has a maintenance-free type engine immobilizer system.
■Conditions that may cause the system to malfunction
Theft prevention labelsToyota CH-R Service Manual > Outer Mirror Switch: Installation
INSTALLATION
PROCEDURE
1. INSTALL OUTER MIRROR SWITCH ASSEMBLY
(a) Engage the claws to install the outer mirror switch assembly.
2. INSTALL MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT ARMREST BASE UPPER
PANEL
Click here
...
Toyota CH-R Service Manual > Immobiliser System(w/ Smart Key System): Parts Location
PARTS LOCATION
ILLUSTRATION
*1
ECM
*2
NO. 1 ENGINE ROOM RELAY BLOCK
ILLUSTRATION
*1
ENGINE SWITCH
*2
STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)
*3
...