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 InspectionFront Brake (Disc)
Purpose/Function
Large diameter, ventilated disc type front brakes with a 297 mm {11.7 in}
diameter and 28 mm {1.1 in} thickness have been adopted, improving braking force
and fade resistance.
Construction
Operation
When brake fluid is applied, the piston equipped on o ...
Body And Accessories SST
49 L067 001
Reflector
49 L067 002
Tripod
49 L067 003
Plum-bob
49 L067 006
Plum-bob
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—
...
Front Seat Removal/Installation
WARNING:
Handling a side air bag improperly can accidentally operate (deploy) the
air bag, which may seriously injure you. Read the service warnings/cautions
in the Workshop Manual before handling the front seat (side air bag integrated)..
If the sliding mechanisms on both side ...