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 Special Service Tool installed to the brake pipe on the left front wheel.

Turn the ignition switch off.
Disconnect the brake pipe flare nut area using a commercially available flare nut wrench.
Remove the clamp and disconnect the brake hose.

Fig 1: Identifying Brake Pipe, Brake Hose And Clamp
Courtesy of MAZDA MOTORS CORP.
Install the Special Service Tools to the brake pipe as shown in the figure.
Bleed the brake line and the Special Service Tools of air. Bleed the air from the Special Service Tools using bleeder screw A.

Fig 2: Installing Special Service Tools To Brake Pipe
Courtesy of MAZDA MOTORS CORP.
Connect the M-MDS to the DLC-2.
After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- When using the IDS (laptop PC)
  1. Select "DataLogger".
  2. Select "Modules".
  3. Select "ABS".
- When using the PDS (Pocket PC)
  1. Select "Module Tests".
  2. Select "ABS".
  3. Select "DataLogger".
    
    Fig 3: Identifying Data Link Connector (DLC-2)
    Courtesy of MAZDA MOTORS CORP.
Select the "MCYLI P" PID.
Start the engine.
Depress the brake pedal, and confirm that the fluid pressure value of the Special Service Tool (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 Special Service Tools , install the brake hose, clamp, and brake pipe to the original positions, and then bleed the air from the brake line. (See AIR BLEEDING .)

Fig 4: Locating Brake Pipe With Mounting Nuts Torque Specifications
Courtesy of MAZDA MOTORS CORP.