Master Cylinder Pressure Sensor On-Vehicle Inspection

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

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

Fig 1: Connecting Suzuki Scan Tool To DLC
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 operators manual for further details.
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 kgf/cm ² , 0 ± 113 psi)
Hoist vehicle and remove right-side front wheel.
Install special tool to right-side front caliper as follows:
1. Remove bleeder plug from right-side front caliper.
2. Install special tool to bleeder plug hole of right-side front caliper.
  Special Tool
  
  (A): 09956-02311
3. Install bleeder plug (1) to special tool.
  
  Fig 2: Installing Bleeder Plug To Special Tool
  Courtesy of SUZUKI OF AMERICA CORP.
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® hydraulic unit/control module assembly.

Master cylinder pressure specification

Brake pedal depressed 10 MPa (100 kgf/cm ² , 1422 psi): 10 ± 1.2 MPa (100 ± 12 kgf/cm ² , 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 .