Brake Fluid Pressure Sensor/Switch: Testing and Inspection

Master Cylinder Pressure Sensor On-Vehicle Inspection

1) Calibrate yaw rate / G sensor assembly. Programming and Relearning
2) Check that basic brake system other than ESP(R). Initial Inspection and Diagnostic Overview
3) Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
Special Tool

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





4) 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 details.
5) 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 ± 8.2 kg/cm2, 0 ± 116 psi)

6) Hoist vehicle and remove right-side front wheel.
7) Connect special tool with rubber hose (1) to Front brake caliper bleeder plug (2).
Special Tool

(A): 09956-02311





8) When bleeder plug loosen and depress brake pedal to make special tool gauge reading 10 MPa (100 kg/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 (102 kg/cm2, 1450 psi): 10 ± 1.2 MPa (102 ± 12.2 kg/cm2, 1450 ± 174 psi)

9) After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.
10) Tighten bleeder plug and bleed air from brake system. Service and Repair