Suzuki Grand Vitara JB416 / JB420. Manual — part 206

4E-1 ABS:

Brakes

ABS

Precautions

Precautions in Diagnosing Troubles

S5JB0A4500001

To ensure that the trouble diagnosis is done accurately
and smoothly, observe the following and follow “ABS
Check”.
• 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” 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 hydraulic unit / 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.

Precautions in On-Vehicle Service

S5JB0A4500002

When connector is connected to ABS hydraulic unit /
control module assembly, do not disconnect connectors
of sensors with ignition switch ON. Otherwise, DTC will
be set in ABS control module.

General Description

ABS Description

S5JB0A4501001

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 hydraulic unit / control module assembly is

incorporated ABS control module, ABS hydraulic unit
(actuator assembly), solenoid valve power supply
driver (transistor), solenoid valve driver (transistor),
pump motor driver (transistor).

– ABS control module which sends operation signal

to ABS 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 hydraulic unit which operates according to

signal from ABS 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
hydraulic unit.

– Solenoid valve driver (transistor) which controls

each solenoid valves in ABS hydraulic unit.

– Pump motor driver (transistor) which supplies

power to pump motor in ABS hydraulic unit.

[A]: Disconnect

C: Pull down to disconnect

[B]: Connect

D: Pull up to connect

2

1

C

D

[A]

[B]

I4RH01450001-01

ABS: 4E-2

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

S5JB0A4501002

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
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 control module.

CAN Communication System Description

S5JB0A4501003

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

1

I5JB0A450001-01

Torque request signal

Wheel speed signal

ABS active

ABS indication on

EBD indication on

ABS diagnostic trouble codes

Combination Meter

Transmit

DATA

ABS hydraulic

unit / control module

assembly

ECM

4WD control module

(if equiped)

I5JB0A450002-03

Brake pedal switch active

Receive

DATA

ABS hydraulic unit / control module assembly

ECM

I5JB0A450003-03

4E-3 ABS:

Schematic and Routing Diagram

ABS Schematic

S5JB0A4502001

INPUT

OUTPUT

ABS 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

ABS warning lamp

EBD warning lamp

(Brake warning lamp)

Data link connector

ABS hydraulic unit/control
module assembly

Wheel speed sensor (RR)

Stop lamp switch

3

7

2

6

4

5

8

12

13

ECM

G sensor (for 4WD
vehicle only)

21

20

14

15

1

22

17

16

18

19

11

10

9

I5JB0A450004-03

1. ABS hydraulic unit / control module assembly

9. Stop lamp switch

17. Wheel speed sensor (Left-rear)

2. ABS control module

10. ABS warning lamp

18. Battery

3. ABS hydraulic unit

11. EBD warning lamp (Brake warning lamp)

19. Ignition switch

4. Solenoid valve power supply driver (transistor)

12. Lamp driver module

20. G sensor (for 4WD vehicle only)

ABS: 4E-4

ABS Wiring Circuit Diagram

S5JB0A4502002

5. Solenoid valve driver (transistor)

13. Data link connector

21. ECM

6. Pump motor driver (transistor)

14. Wheel speed sensor (Right-front)

22. 4 way joint

7. Solenoid valve

15. Wheel speed sensor (Left-front)

8. Pump motor

16. Wheel speed sensor (Right-rear)

WHT/RED

WHT/GRN

BLK/YEL

WHT/RED

M

12V

GRN/ORN

1

2

3

4

8

10

11

12

13

[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

12V

5V

12V

23

24

VCC

22

a

WHT/BLU

WHT/BLU

14

15

16

17

PPL/WHT

18

19

+BB

PPL/RED

WHT

GRN

GRN/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

26

29

28

27

21

7

6

5

32

32

30

31

25

9

32

I5JB0A450005-02

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

module assembly

11. ABS 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