Brake Fluid Pressure Sensor Inspection

NOTE:

The brake fluid pressure sensor is integrated into the DSC HU/CM and installed to the brake line of LF-RR brake system. Therefore, perform the brake fluid pressure sensor inspection with the SST installed to the brake pipe on the left front wheel.

Turn the ignition switch to the LOCK position.
Loosen the brake pipe flare nut using the commercially available flare nut wrench.
Disconnect the brake pipe.
Remove the bolt and disconnect the brake hose.

Fig 1: Brake Pipe Flare Nut, Bolt And Brake Hose
Courtesy of MAZDA MOTORS CORP.
Install the SSTs to the brake pipe as shown in the illustration.
Perform air bleeding of the SST and brake line from bleeder screw A.

Fig 2: Installing SSTs To Brake Pipe
Courtesy of MAZDA MOTORS CORP.
Connect the M-MDS to the DLC-2.

Fig 3: DLC-2
Courtesy of MAZDA MOTORS CORP.
Select the "MCYLI P" PID. (See ON-BOARD DIAGNOSTIC [DYNAMIC STABILITY CONTROL (DSC)] )
Start the engine.
Depress the brake pedal, and verify that the fluid pressure value of the SST (gauge) and the value shown on the M-MDS are equal.
- If the fluid pressure values are different, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION )
Remove the SSTs after the inspection and install the brake hose, bolt and brake pipe to their original positions.

Fig 4: Brake Hose And Brake Pipe Flare Nut With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Perform air bleeding of the brake line. See AIR BLEEDING