Suzuki sq-416-420-625 Service Manual page 347

5E1-6 ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL)
1. Diagnosis connector
(6 pins connector)
2. Ground terminal
3. Diag. switch terminal
4. Service wire
ABS HYDRAULIC UNIT/CONTROL MODULE
ASSEMBLY
ABS control module is a component of ABS hydrauli 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 as described below.
1) When ignition switch is turned ON, "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
ON (more than one wheel speed sensor signals are inputted),
solenoid valves and motor 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.
4) When an abnormality in the system is detected, "ABS" warning
lamp lights and the area where that abnormality lies is stored in
the memory of EEPROM in ABS control module.
5) When Diag. switch terminal of diagnosis connector (monitor
connector) is grounded, the abnormal area is output as DTC. It
is indicated by flashing of "ABS" warning lamp. (Refer to the
table below. )
SYSTEM CONDITION
No trouble in
the past
In good condi- g
tion at present
Trouble occur-
red in the past
No trouble in
Abnormality
the past
exists at exists at
Trouble occur-
present
red in the past
For procedure to clear all DTC's, refer to the item "Diagnostic
Trouble Code Clearance" in this section.
Also ABS control module turns ON EBD warning lamp (brake warn-
ing lamp) depending on the trouble that detected by the module and
EBD warning lamp does not indicate DTC as well as "ABS" warning
lamp.
Fail-Safe Function
When an abnormality occurs (an abnormal DTC is detected), ABS
control module turns OFF the fail-safe relay which supplies power
to ABS hydraulic unit. Thus, with ABS not operating, brakes func-
tion just like the brake system of the vehicle not equipped with ABS.
ABS WARNING LAMP
Diag. switch Diag. switch
terminal is not terminal is
grounded grounded
OFF DTC 12
OFF History DTC
ON Current DTC
Current and
ON
history DTCs