Brake Fluid Level Sensor/Switch: Testing and Inspection

INSPECT BRAKE FLUID LEVEL WARNING SWITCH




a. Remove the reservoir tank cap and strainer.
b. Disconnect the B4 switch connector.
c. Measure the resistance of the switch.

Standard:
Float up (switch OFF): 10 kOhm or higher

d. Using a siphon or similar tool, drain fluid out of the reservoir tank.
e. Measure the resistance of the switch.

Standard:
Sink (switch ON): Below 1 Ohm

If the result is not as specified, replace the reservoir tank.

f. Pour brake fluid into the reservoir tank.