1. Disconnect the negative battery cable..
2. Remove the BSM OFF switch..
3. Verify that the resistance between BSM OFF switches B and C is as indicated in the table.

If the resistance cannot be verified as indicated in the table, replace the cluster switch.
4. Apply battery positive voltage to BSM OFF switch terminal J, and connect terminal I to ground.

5. Verify that the LED illuminates.
If there is any malfunction, replace the cluster switch.
Blind Spot Monitoring (Bsm) Off Switch
Blind Spot Monitoring (Bsm) SystemLow And Reverse Brake [Fw6 A EL, Fw6 Ax EL]
Purpose/Function
The low and reverse brake stops the rotation of the front internal gear and
rear planetary carrier while in 1GR and in reverse, locking them to the transaxle
case.
Construction
The low and reverse brake consist of the following parts shown in the figure.
...
Air Intake Actuator [Manual Air Conditioner]
Purpose
The air intake actuator moves the air intake door in the blower unit to switch
the air intake port.
Function
The air intake actuator drives the motor based on the signal from the climate
control unit and moves the air intake door to the FRESH or REC position.
...
Electrical System
Electrical Parts
Battery cable
Before disconnecting connectors or removing electrical parts, disconnect
the negative battery cable.
Wiring Harness
To remove the wiring harness from the clip in the engine room, pry up the
hook of the clip using a flathead screwdriver. ...