Brake Fluid Pressure Sensor/Switch: Testing and Inspection

Master Cylinder Pressure Sensor On-Vehicle Inspection

1) Check that basic brake system other than ESP(R) refer to Initial Inspection and Diagnostic Overview Brakes Diagnosis Note.
2) Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
Special Tool

(A): SUZUKI scan tool (SUZUKI-SDT)





3) Turn ignition switch to ON position and select menu "Data List" mode of SUZUKI scan tool. Refer to scan tool operator's manual for further derails.
4) When brake pedal is released, check "Master Cyl Press" under "Data List" of SUZUKI scan tool.

If pressure is out of specification, replace ESP(R) hydraulic unit / control module assembly.

Master cylinder pressure specification
Brake pedal released: 0 ± 0.8 MPa (0 ± 8 kgf/cm2, 0 ± 113 psi)

5) Hoist vehicle and remove right-side front wheel.
6) Install special tool to right-side front caliper as follows.
a) Remove bleeder plug from right-side front caliper.
b) Install special tool to bleeder plug hole of right-side front caliper.
Special Tool

(A): 09956-02311

c) Install bleeder plug (1) to special tool.






7) When bleeder plug loosen and depress brake pedal to make special tool gauge reading 10 MPa (100 kgf/cm2, 1422 psi), check "Master Cyl Press" under "Data List" of SUZUKI scan tool.

If pressure displayed on SUZUKI scan tool is out of specification, replace ESP(R) hydraulic unit / control module assembly.

Master cylinder pressure specification
Brake pedal depressed 10 MPa (100 kgf/cm2, 1422 psi): 10 ± 1.2 MPa (100 ± 12 kgf/cm2, 1422 ± 170 psi)

8) After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.
9) Tighten bleeder plug and bleed air from brake system, referring to Service and Repair Air Bleeding of Brake System.