Abs Hydraulic Unit/Control Module Assembly; Self-Diagnosis Function; Fail-Safe Function - Suzuki GRAND VITARA XL-7 Owner's Manual

5E2-4 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 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 sec-
onds.
3) When an abnormality in the system is detected, ABS warn-
ing lamp lights and the area where that abnormality lies is
stored in the memory of EEPROM in ABS control module.
4) When Diag. switch terminal (2) of diagnosis connector (1)
(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
condition Trouble occurred in
at present the past
No trouble in the past
Abnormal-
ity exists Trouble occurred in
at present
the past
5) For procedure to clear all DTC's, refer to "DIAGNOSTIC
TROUBLE CODE CLEARANCE" in this section.
3. Ground terminal
4. Service wire
Also ABS control module turns ON EBD warning lamp (brake
warning lamp) depending on the trouble that detected by the
module and EBD warning lamp does not indicate DTC.

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 function just like the brake system of the vehicle without
ABS.
ABS WARNING LAMP
Diag. switch Diag. switch
terminal is terminal is
not grounded grounded
OFF DTC 12
OFF History DTC
ON Current DTC
Current and
ON
history DTCs