ABS Hydraulic Unit Operation Check

ABS Hydraulic Unit Operation Check

NOTE:

- Make sure of the following conditions before ABS hydraulic unit operation check.
Otherwise, ABS hydraulic unit operation can not be checked properly.

- No air is trapped in brake system.
- Battery voltage is 11 V or more.
- Brakes do not drag.
- ABS control module has detected no DTC.

- Operation check must be performed by 2 persons.
- When installing new ABS hydraulic unit / control module assembly, ABS warning light may flash at ignition switch is turned ON position. Accordingly perform "Precautions in Hydraulic Unit Operation Check" to stop flashing of ABS warning light.

1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to DLC (1) located on underside of instrument panel at driver's seat side.
Special Tool

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





3) Hoist vehicle until tire can be rotated.
4) Set transmission to neutral position and release parking brake.
5) Turn each wheel gradually by hand to check if brake dragging occurs. If it does, correct.
6) Turn ignition switch to ON position and select menu to "HYDRAULIC CONTROL TEST" under "Utility" of SUZUKI scan tool.
7) Perform the following checks with help of another person.

Brake pedal (1) should be depressed and then select testing wheel by SUZUKI scan tool and the wheel (2) should be turned by another person's hand. At this time, check that:
- Operation sound of solenoid is heard and the 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.





8) Check for all 4-wheels condition respectively. If a faulty condition is found, replace hydraulic unit / control module assembly.
9) After completing the check, turn ignition switch to OFF position and disconnect SUZUKI scan tool from DLC.