Suzuki GA413, Service Manual

Page: 259 / 1246

ABS CONTROL MODULE
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 “ABS” warning lamp as described below.
NOTE:
If ABS hydraulic unit/control module assembly has been re-
placed by a new one, “ABS” warning lamp may flash when
ignition switch is turned ON. In such case, perform “ABS Hy-
draulic Unit Operation Check” described in this section and
make sure that it does not flash.
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 (system is in good
condition), “ABS” warning lamp turns OFF after 2 seconds.
3) When vehicle starts to move after ignition switch is turned ON
(more than one wheel speed sensor signals are inputted), sole-
noid 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 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. )
For procedure to clear all DTCs, refer to item “Diagnostic
Trouble Code Clearance” in this section.
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.
1. Diagnosis connector
(6 pins connector)
2. Ground terminal
3. Diag. switch terminal
4. Service wire
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E-5
ABS WARNING LAMP
SYSTEM CONDITION
Diag. switch
terminal is not
grounded
Diag. switch
terminal is
grounded
In good condi-
No trouble
in the past
OFF DTC 12
g
tion at present
Trouble occurred
in the past
OFF History DTC
Abnormality
exists at
No trouble in
the past
ON Current DTC
exists at
present
Trouble occurred
in the past
ON
Current and
history DTCs