Brake Master Cylinder Pressure Sensor On-Vehicle Inspection

Calibrate sensors, see SENSOR CALIBRATION OF ESP® .
Check basic brake system other than ESP®, see PRECAUTIONS FOR BRAKE SERVICE .
Confirm that ignition mode of keyless push start system is in "OFF".
Connect SUZUKI scan tool to DLC (1).
Special Tool
1. SUZUKI scan tool (SUZUKI-SDT)
Fig 1: Connecting Scan Tool To DLC
Courtesy of SUZUKI OF AMERICA CORP.
Push engine switch to change ignition mode of keyless push start system to "ON" and select menu "DATA LIST" mode of SUZUKI scan tool. Refer to scan tool operator's manual for further details.
Check "Master Cyl Press" under "DATA LIST" of SUZUKI scan tool with brake pedal released. If check result is not as specified, replace ESP® hydraulic unit/control module assembly.
Master cylinder pressure specification

Brake pedal released: 0 ± 0.8 MPa (0 ± 8.2 kgf/cm ² , 0 ± 116 psi)
Hoist vehicle and remove left-side front wheel.
Remove bleeder plug from left-side front caliper and install special tool to left-side front caliper.
Special Tool
1. 09956-02311
Fig 2: Installing Special Tool To Left-Side Front Caliper
Courtesy of SUZUKI OF AMERICA CORP.
When depressing brake pedal up to special tool gauge reading 10 MPa (102 kgf/cm² , 1450 psi), check "Master Cyl Press" under "DATA LIST" of SUZUKI scan tool.
If check result displayed on SUZUKI scan tool is not as specified, replace ESP® hydraulic unit/control module assembly.

Master cylinder pressure specification

Brake pedal depressed 10 MPa (102.0 kgf/cm ² , 1450 psi): 10 ± 1.2 MPa (102 ± 12.2 kgf/cm ² , 1450 ± 174 psi)
After completing the check, push engine switch to change ignition mode of keyless push start system to "OFF" and disconnect SUZUKI scan tool from DLC.
Remove special tool, tighten bleeder plug and bleed air from brake system. Refer to AIR BLEEDING OF BRAKE SYSTEM
Tightening torque

Bleeder plug: 8.0 N.m (0.82 kg-m, 6.0 lbf-ft)
Check brake fluid level in master cylinder reservoir.