Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual — part 52

4E-2 ABS:

General Description

ABS Description

S5JB0E4501001

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.

Self-Diagnosis Description

S5JB0E4501004

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.

1

I5JB0A450001-01

ABS: 4E-3

CAN Communication System Description

S5JB0E4501003

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 right)

Wheel speed signal (front left)

Wheel speed signal (rear right)

Wheel speed signal (rear left)

ABS active

ABS indication on

EBD indication on

Combination Meter

Transmit

DATA

ABS (ESP®) control

module

ECM

4WD control module

(if equipped)

I5JB0D450001-02

Brake pedal switch active

DATA

ABS (ESP®) control module

Receive

ECM

I5JB0B450002-01

4E-4 ABS:

Schematic and Routing Diagram

ABS Schematic

S5JB0E4502001

INPUT

OUTPUT

ABS (ESP®) control module

Wheel speed sensor (LF)

Wheel speed sensor (LR)

Wheel speed sensor (RF)

Battery Voltage

Ignition Voltage

Pump motor
driver (transistor)

Solenoid valve power
supply driver (transistor)

Solenoid valve
driver (transistor)

Hydraulic unit

Pump motor

LF inlet solenoid valve

LF outlet solenoid valve

LR inlet solenoid valve

LR outlet solenoid valve

RF inlet solenoid valve

RF outlet solenoid valve

RR inlet solenoid valve

RR outlet solenoid valve

Combination meter

ABS warning lamp
EBD warning lamp

Data link connector

ABS (ESP

®

) hydraulic unit /

control module assembly

Wheel speed sensor (RR)

Stop lamp switch

3

7

2

6

4

5

8

12

13

ECM

Longitudinal G sensor (for
4WD vehicle only)

Yaw rate / G sensor assembly

Longitudinal G sensor
(for 4WD vehicle only)

21

20

14

15

1

22

17

16

18

19

11

10

9

23

[A]

[B]

[A]

[B]

CAN driver

I5JB0D450002-04

[A]: With ESP

®

8. Pump motor

17. Wheel speed sensor (Left-rear)

[B]: Without ESP

®

9. Stop lamp switch

18. Battery

1. ABS (ESP

®) hydraulic unit / control module

assembly

10. ABS warning lamp

19. Ignition switch

2. ABS (ESP

®) control module

11. EBD warning lamp (Brake warning lamp)

20. G sensor (for 4WD vehicle only)

3. ABS (ESP

®) hydraulic unit

12. Lamp driver module

21. ECM

4. Solenoid valve power supply driver (transistor)

13. Data link connector

22. 4 way joint

ABS: 4E-5

ABS Wiring Circuit Diagram

S5JB0E4502002

The figure shows for vehicle without ESP

®. For vehicle equipped with ESP®, refer to “Electronic Stability Program

Wiring Circuit Diagram in Section 4F”.

5. Solenoid valve driver (transistor)

14. Wheel speed sensor (Right-front)

23. Yaw rate / G sensor assembly

6. Pump motor driver (transistor)

15. Wheel speed sensor (Left-front)

7. Solenoid valve

16. Wheel speed sensor (Right-rear)

[A]

14

15

16

17

18

19

20

21

22

23

24

25

1

2

3

4

5

6

7

8

9

10

11

12

13

26

E03

a

12V

12V

27

WHT/RED

WHT/GRN

BLK/YEL

WHT/RED

M

12V

GRN/ORN

1

2

3

4

8

10

11

12

13

12V

5V

12V

23

24

VCC

22

WHT/BLU

WHT/BLU

14

15

16

17

PPL/WHT

18

19

+BB

PPL/RED

WHT

BLK

WHT

BLK

WHT

BLU/BLK

GRN/BLK

BLU

GRN

YEL/BLK

YEL

LT GRN
LT GRN/BLK

E03-21

E03-22

E03-19

E03-18

E03-15

E03-16

E03-25

E03-24

E03-7

E03-13

E03-26

BLK

BLK

E03-5

E03-14

E03-1

RED/BLK

RED/BLK

E03-12
E03-6

RED

WHT

RED

WHT

WHT/RED

WHT/BLU

E03-10
E03-8

RED

WHT

12V

12V

12V

12V

12V

BLK

WHT

BLK

WHT

20

29

28

7

6

5

30

31

25

9

32

32

32

G31-1

G31-3

G31-1

G31-3

G31-7

G31-8

26

32

E23-4
E23-19

GRN/WHT

21

GRN

12V

E23-20

I5JB0D450003-02

[A]: Terminal arrangement of ABS hydraulic unit / control

module assembly

11. Pump motor driver (transistor)

23. Internal memory

a: Upside

12. Pump motor

24. Solenoid valve driver (transistor)

1. Battery

13. Solenoid valves

25. G sensor (4WD vehicle only)

2. Main fuse box

14. Right-rear wheel speed sensor

26. ECM

3. Ignition switch

15. Left-rear wheel speed sensor

27. BCM