Toyota does not recommend towing a trailer with your vehicle.
Toyota also does not recommend the installation of a tow hitch or the use of a tow hitch carrier for a wheelchair, scooter, bicycle, etc. Your vehicle is not designed for trailer towing or for the use of tow hitch mounted carriers.
Toyota CH-R Service Manual > Blind Spot Monitor System: Operation Check
OPERATION CHECK
HINT:
The blind spot monitor beam axis confirmation is performed to confirm whether
the sensor's beam axis is correct, and perform adjustment of the beam axis by using
reflector.
BLIND SPOT MONITOR BEAM AXIS CONFIRMATION
(a) When performing the blind spot monitor beam axi ...
Toyota CH-R Service Manual > Power Mirror Control System: Terminals Of Ecu
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION
BLOCK ASSEMBLY (w/ Retract Mirror)
(a) Remove the main body ECU (multiplex network body ECU) from the instrument
panel junction block assembly.
Click here
(b) Reconnect the instrument pane ...