Master Cylinder Pressure Sensor On-Vehicle Inspection

Check that basic brake system other than ESP®, refer to BRAKES DIAGNOSIS NOTE .
Connect SUZUKI scan tool to data link connector (DLC) (1) with ignition switch OFF.
Special Tool

(A): SUZUKI scan tool

Fig 1: Connecting SUZUKI Scan Tool To Data Link Connector
Courtesy of SUZUKI OF AMERICA CORP.
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.
When brake pedal is released, check "Master Cyl Press" under "DATA LIST" of SUZUKI scan tool.
If pressure is out of specification, replace ESP® hydraulic unit/control module assembly.

Master cylinder pressure specification

Brake pedal released: 0 ± 0.8 MPa (0 ± 8 kg/cm2, 0 ± 113 psi)
Hoist vehicle and remove right-side front wheel.
Connect special tool with rubber hose (1) to front brake caliper bleeder plug (2).
Special Tool

(A): 09956-02311

Fig 2: Connecting Special Tool With Rubber Hose To Front Brake Caliper Bleeder Plug
Courtesy of SUZUKI OF AMERICA CORP.
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® hydraulic unit/control module assembly.

Master cylinder pressure specification

Brake pedal depressed 10 MPa (100 kg/cm2, 1422 psi): 10 ± 1.2 MPa (100 ± 12 kg/cm2, 1422 ± 170 psi)
After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.
Tighten bleeder plug and bleed air from brake system, referring to AIR BLEEDING OF BRAKE SYSTEM .