Brake Fluid Pressure Sensor Inspection

Switch the ignition off.
Disconnect the brake pipe from the LF brake hose.
Remove the clip.
Remove the LF brake hose from the bracket.
Detach the brake pipe from the pipe holder.

Fig 1: Removing Brake Pipe From Pipe Holder
Courtesy of MAZDA MOTORS CORP.
Install the SST to the brake pipe as shown in the figure.
Bleed the brake line and the SSTs of air. Bleed the air form the SSTs using bleeder screw A.
Connect the M-MDS to the DLC-2.
Select the "BRK_F_P_R" PID.
Start the engine.
Depress the brake pedal, and confirm that the fluid pressure value of the SST (gauge) and the value shown on the M-MDS are equal
- If the fluid pressures are different, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION .)
After the inspection, remove the SSTs , install the brake hose, clamp, and brake pipe to the original positions, and then bleed the air from the brake line. (See BRAKE HOSE (FRONT) REMOVAL/INSTALLATION .) (See BRAKE FLUID AIR BLEEDING .)

Fig 2: Installing SST To Brake Pipe
Courtesy of MAZDA MOTORS CORP.