Suzuki Grand Vitara JB419. Service manual - part 83

To ensure that the trouble diagnosis is done accurately
and smoothly, observe the following and follow “ABS
Check”.
• Diagnostic information stored in ABS (ESP

®) control

module memory can be cleared as well as checked by
using SUZUKI scan tool. Before using scan tool, read
its Operator's (Instruction) Manual carefully to have
good understanding as to what functions are available
and how to use it.

• If the vehicles was operated in any of the following

ways, ABS warning lamp may light momentarily but
this does not indicate anything abnormal in ABS.
– The vehicle was driven with parking brake pulled.
– The vehicle was driven with brake dragging.
– The vehicle was stuck in mud, sand, etc.
– Wheel spin occurred while driving.
– Wheel(s) was rotated while the vehicle was jacked

up.

• Be sure to read “Precautions for Electrical Circuit

Service in Section 00 in related manual” before
inspection and observe what is written there.

• Be sure to use the trouble diagnosis procedure as

described in “ABS Check”. Failure to follow it may
result in incorrect diagnosis. (Some other diagnosis
trouble code may be stored by mistake in the memory
of ABS control module during inspection.)

• When disconnecting ABS control module connector

(1), pull down lock lever (2) of connector.
When connecting, set the connector on ABS hydraulic
unit / control module assembly and pull up the lock
lever (2) until it locks.

• When disconnecting ESP

® control module connector

(1), pull up lock lever (2) of connector.
When connecting, set the connector on ESP

hydraulic unit / control module assembly and pull
down the lock lever (2) until it locks.

• Communication of ECM, BCM, ABS (ESP

®) control

module (if equipped), 4WD control module (if
equipped), immobilizer control module (ICM) (if
equipped), combination meter and steering angle
sensor (if equipped) is established by CAN (Controller
Area Network).Therefore, be sure to read
“Precautions for Installing Mobile Communication
Equipment in Section 00 in related manual” before
inspection and handle CAN communication line.

Precautions in On-Vehicle Service

S5JB0B4500002

When connector is connected to ABS (ESP

®) hydraulic

unit / control module assembly, do not disconnect
connectors of sensors with ignition switch
ON.Otherwise, DTC will be set in ABS (ESP

®) control

module.

Precautions in Hydraulic Unit Operation Check

S5JB0B4500003

ABS (ESP

®) hydraulic unit / control module assembly

function is checked by correct wheel lock / release
condition when brake pressure is pressurized /
depressurized using SUZUKI scan tool. The hydraulic
unit operation check referring to “Hydraulic Unit
Operation Check” should be performed to confirm the
correct brake pipe connection in the following cases.
• ABS (ESP

®) hydraulic unit / control module assembly

was replaced.

• Brake pipe and/or hose were replaced.

[A]: Disconnect

C: Pull down to disconnect

[B]: Connect

D: Pull up to connect

[A]

[B]

I4RH01450001-01

[A]: Disconnect

C: Pull up to disconnect

[B]: Connect

D: Pull down to connect

[A]

[B]

I6JB01450001-02

ABS: 4E-2

General Description

ABS Description

S5JB0B4501001

ABS is controlled by ABS control module or by ESP

control module (if equipped).
ABS activation and control with ESP

® are done by

ESP

® hydraulic unit / control module

assembly.Regarding TCS and stability control excluding
ABS system with ESP

®, refer to Section 4F.

The ABS (Antilock Brake System) controls the fluid
pressure applied to the wheel cylinder of each brake
from the master cylinder so that each wheel is not locked
even when hard braking is applied.
This ABS has also the following function.
While braking is applied, but before ABS control
becomes effective, braking force is distributed between
the front and rear so as to prevent the rear wheels from
being locked too early for better stability of the vehicle.
The main component parts of this ABS include the
following parts in addition to those of the conventional
brake system.
• Wheel speed sensor which senses revolution speed

of each wheel and outputs its signal.

• ABS warning lamp which lights to inform abnormality

when system fails to operate properly.

• ABS (ESP

®) hydraulic unit / control module assembly

is incorporated ABS (ESP

®) control module, ABS

(ESP

®) hydraulic unit (actuator assembly), solenoid

valve power supply driver (transistor), solenoid valve
driver (transistor), pump motor driver (transistor).
– ABS (ESP

®) control module which sends operation

signal to ABS (ESP

®) hydraulic unit to control fluid

pressure applied to each wheel cylinder based on
signal from each wheel speed sensor so as to
prevent wheel from locking.

– ABS (ESP

®) hydraulic unit which operates

according to signal from ABS (ESP

®) control

module to control fluid pressure applied to wheel
cylinder of each 4 wheels.

– Solenoid valve power supply driver (transistor)

which supplies power to solenoid valve in ABS
(ESP

®) hydraulic unit.

– Solenoid valve driver (transistor) which controls

each solenoid valves in ABS (ESP

®) hydraulic unit.

– Pump motor driver (transistor) which supplies

power to pump motor in ABS (ESP

®) hydraulic

unit.

This ABS is equipped with Electronic Brake force
Distribution (EBD) system that controls a fluid pressure
of rear wheels to best condition, which is the same
function as that of proportioning valve, by the signal from
wheel sensor independently of change of load due to
load capacity and so on. And if the EBD system fails to
operate properly, the brake warning lamp lights to inform
abnormality.

ABS Hydraulic Unit / Control Module Assembly
Description

S5JB0B4501002

ABS (ESP

®) control module is a component of ABS

(ESP

®) hydraulic unit / control module assembly and

has the following functions.

Self-Diagnosis Function
ABS (ESP

®) control module diagnoses conditions of the

system component 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 (1) as described.

• When ignition switch is turned ON, ABS warning lamp

lights for 2 seconds to check its circuit.

• When no abnormality has been detected (the system

is in good condition), ABS warning lamp turns OFF
after 2 seconds.

• 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 (ESP

®) control module.

I5JB0A450001-01

4E-3 ABS:

CAN Communication System Description

S5JB0B4501003

Refer to “CAN Communication System Description in Section 1A” for CAN communication system description.
ABS communicates control data with each control module as follows.

ABS Transmission Data

ABS Reception Data

Torque up request

Wheel speed signal (front)

Wheel speed signal (rear right)

Wheel speed signal (rear left)

ABS active

ABS indication on

EBD indication on

ABS diagnostic trouble codes

Combination Meter

Transmit

DATA

ABS (ESP®) control

module

ECM

4WD control module

(if equipped)

I5JB0B450001-01

Brake pedal switch active

DATA

ABS (ESP®) control module

Receive

ECM

I5JB0B450002-01

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