Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

PRECAUTIONS
When connector are connected to ABS hydraulic unit control module assembly, do not disconnect connectors of sensors and turn ignition switch ON. Then DTC will be set in ABS control module.

ABS HYDRAULIC UNIT OPERATION CHECK (USING SUZUKI SCAN TOOL)





1. Connect SUZUKI scan tool to Data Link Connector (DLC) (1) with ignition switch OFF.
Special tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16/14 pin DLC cable)
2. Turn ignition switch to ON position and check actuator operation using "HYDRAULIC CONTROL TEST" under "miscellaneous test" ("MISC. TEST") mode of SUZUKI scan tool.

ABS HYDRAULIC UNIT OPERATION CHECK (NOT USING SUZUKI SCAN TOOL)
1. Check that basic brake system other than ABS is in good condition.





2. Check that battery voltage is 11 V or higher.
3. With "ABS" warning lamp, check that no abnormality is detected in ABS.
4. Lift up vehicle.
5. Set transmission to neutral and release parking brake.
6. Turn each wheel gradually by hand to check if brake dragging occurs. If it does, correct.





7. With diag. switch terminal (2) of diagnosis connector (1) connected to ground by using service wire (4), turn ignition switch to ON position and check that "ABS" warning lamp indicates normal DTC (DTC 12).
8. Turn ignition switch to OFF position.
9. Perform following checks with help of another person.





10. Brake pedal (1) should be depressed.
a) Ignition switch turned to ON position by one person.
b) Wheel 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 seconds (brake force is Repressurized).
Operation sound of pump motor is heard and pulsation is felt at brake pedal.
11. 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 to OFF position and remove service wire from diagnosis connector.