Not Using SUZUKI Scan Tool

Check that basic brake system other than ABS is in good condition.
Check that battery voltage is 11 V or higher.

Fig 1: Checking Battery Voltage
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With ABS warning lamp, check that no abnormality is detected in ABS. Refer to DTC Check .
Lift up vehicle.
Set transmission to neutral and release parking brake.
Turn each wheel gradually by hand to check if brake dragging occurs. If it does, correct.
With diagnosis switch terminal (2) of monitor connector (blue) (1) connected to ground terminal (3) using service wire (4), turn ignition switch ON and check if ABS warning lamp indicates DTC 12 referring to DTC Table .
If malfunction DTC is indicated, repair it first.

Fig 2: Shorting Diagnosis Switch Terminal
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Turn ignition switch OFF.
Perform the following checks with help of another person. Brake pedal (1) should be depressed and then ignition switch (2) turned ON by one person and wheel (3) should be turned by another person's hand. At this time, check that:
- Operation sound of solenoid is heard and wheel turns only about 0.5 sec. (Brake force is depressurized).
- Operation sound of pump motor is heard and pulsation is felt at brake pedal.
  
  Fig 3: Performing Checks
  Courtesy of SUZUKI OF AMERICA CORP.
If all 4-wheels cannot be checked during one ignition cycle (OFF --> ON), repeat Steps 8) and 9) till all 4 wheels are checked.
If a faulty condition is found in Steps 9) and 10), replace hydraulic unit/control module assembly.
Turn ignition switch OFF and remove service wire from monitor coupler.