Suzuki SY413 Service Manual page 1790

5B-6 ANTILOCK BRAKE SYSTEM (ABS)
ABS HYDRAULIC UNIT/CONTROL MODULE
ASSEMBLY
ABS control module is a component of ABS hydraulic unit/control
module assembly and has the following functions.
Self-Diagnosis Function
ABS control module diagnoses conditions of the system compo-
nent parts (whether or not there is any abnormality) all the time and
indicates the results (warning of abnormality occurrence and DTC)
through the ABS warning lamp and outputs it through the diagnosis
output terminal as described below.
1) When ignition switch is turned to ON position, ABS warning
lamp lights for 2 seconds to check its bulb and circuit.
2) When no abnormality has been detected (the system is in good
condition), ABS warning lamp turns OFF after 2 seconds.
3) When the vehicle starts to move after the ignition switch is
turned to ON position (more than one wheel speed sensor sig-
nals are inputted), solenoid valves and motors of ABS hydraulic
unit operate once one after another for electrical check. During
this check, motor operation sound may be heard but that means
nothing abnormal.