1. Disconnect the brake fluid level sensor connector from the master cylinder.
2. Inspect for continuity according to fluid level between the brake fluid level sensor terminals.

If not as indicated in the table, replace the reserve tank..

Brake Switch InspectionTransfer Oil Inspection [Fw6 Ax EL]
1. Park the vehicle on level ground.
2. Remove the oil level plug with the washer.
3. Checking by hand, verify that the oil is near the brim of the plug hole.
If the oil level is low, add the specified amount and type of oil through
the oil level plug hole.
Transfer oil
...
Blind Spot Monitoring (Bsm) System
Outline
The blind spot monitoring (BSM) system detects vehicles approaching from
the rear blind spots, and illuminates the BSM indicator light on the outer mirror
glass. When the BSM indicator light is illuminated and the turn light switch
is turned on to the side in which the indica ...
Afs Off Indicator Light
Purpose
The AFS OFF indicator light notifies the user that the AFS is stopped or
a malfunction occurs in the AFS.
Function
The AFS OFF indicator light illuminates when the AFS is stopped and flashes
when a malfunction occurs in the AFS.
Construction
When the mi ...