The Blind Spot Monitor is a system that has 2 functions;
These functions use same sensors.

RCTA function: When a vehicle approaching from the right or left at the rear of the vehicle is detected, both outside rear view mirror indicators will flash.
Turning the BSM function/RCTA function on/offToyota CH-R Service Manual > Airbag System: SRS Warning Light Remains ON
DESCRIPTION
The SRS warning light is located in the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds
after the ignition switch is turned from off to ON, and then goes off automatically.
If there is a malfunction in the SRS, the SRS w ...
Toyota CH-R Service Manual > Wiper And Washer System: Parts Location
PARTS LOCATION
ILLUSTRATION
*A
w/ Rain Sensor
*B
for Cold Area Specification Vehicles
*1
WINDSHIELD WIPER MOTOR ASSEMBLY
*2
RAIN SENSOR
*3
REAR WIPER MOTOR ASSEMBLY
...