Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 59

4E-30 ABS: 

DTC U1073: Control Module Communication Bus Off

S5JB0E4504020

Wiring Diagram

WHT

RED

WHT

RED

WHT/BLU

WHT

RED

WHT

RED

E91-22 

E91-23

E03-12

E03-6

E03-8

WHT/BLU

WHT/RED

E23-19

E23-4

G31-1

G31-3

G44-19

G44-18

WHT

RED

WHT

RED

E92-17

E92-7

G28-8

G28-10

G45-9

G45-10

WHT/RED

E03-10

WHT

RED

WHT

RED

2

WHT

RED

WHT/BLU

E53-13

E53-44

E53-46

WHT/RED

E53-42

1

3

4

5

10

6

8

7

9

G31-2

G31-4

11

[D]

E03

15
16
17
18
19
20
21
22
23
24
25

2
3
4
5
6
7
8
9

10
11
12

1

13

14

26

[I]

G44

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32 31 30 29

24 23

37

18

19

20

[F]

6

5

16 15 14 13 12 11

4 3

24 23

21

22

10 9

8

7

2

1

19

20

18 17

E92

[J]

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

G28

[G]

G31

1

2

3

4

7

8

9

10

11

14

15

16
36

34

35

24 23

21

22

28 27

25

26

37

39 38

40

18 17

13 12

19

20

E91

1

2

3

10

11

12

16

17

18

15 14 13

19

20

21

25

26

5

6

[H]

[E]

[C]

E53

16

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

[A]

[K]

G45

10 9

3 2 1

[A]

[B]

2 1

E23

3

4

18

19

5

6

7

10

11

17

20

47 46

49

50

51

21

22

52

16

25

9

24

14

29

55

57

5453

59

60

58

26

27

28

15
30

56

48

32 31

34

35

36

37

40

42

3938

44

45

43

41

33

12

13

23

8

I5JB0D450004-01

[A]: With ESP

®

[I]: Keyless start control module connector 

(viewed from harness side)

6. 4WD control module (if equipped)

[B]: Without ESP

®

[J]: Combination meter connector (viewed 

from harness side)

7. Keyless start control module (if equipped)

[C]: ESP

® control module connector (viewed from 

terminal side)

[K]: Steering angle sensor connector (viewed 

from harness side)

8. Combination meter

[D]: ABS control module connector (viewed from terminal 

side)

1. ESP

® hydraulic unit / control module 

assembly

9. Steering angle sensor (if equipped)

[E]: ECM connector (viewed from harness side)

2. ABS hydraulic unit / control module 

assembly

10. Junction connector

[F]: TCM connector (viewed from harness side)

3. ECM

11. Data link connector (DLC)

[G]: BCM connector (viewed from harness side)

4. TCM

[H]: 4WD control module connector (viewed from harness 

side)

5. BCM

ABS: 4E-31

DTC Detecting Condition
Transmission error that is inconsistent between transmission data and transmission monitor (CAN bus monitor) data is 
detected more than 7 times continuously.

DTC Troubleshooting

Step

Action

Yes

No

1

Was “ABS Check” performed?

Go to Step 2.

Go to “ABS Check”.

2

1) Check connection of connectors of all control modules 

communicating by means of CAN.

2) Recheck DTC.

Is DTC U1073 indicated?

Go to Step 3.

Intermittent trouble. 
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 00 
in related manual”.

3

1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules 

communicating by means of CAN.

3) Check CAN communication circuit between control 

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Go to Step 4.

Repair insulation of 
CAN communication 
line circuit referring to 
“Precaution for CAN 
Communication System 
in Section 00 in related 
manual”.

4

1) Turn ignition switch to OFF position.
2) Connect connectors of disconnected control modules 

communicating by means of CAN.

3) Disconnect each connector.

• ECM
• TCM (for A/T model)
• BCM
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor (with ESP

®)

4) Recheck DTC.

Is DTC U1073 detected?

Check ABS (ESP

®) 

control module power 
and ground circuit. If 
circuits are OK, 
substitute a known-
good ABS (ESP

®) 

hydraulic unit / control 
module assembly and 
recheck.

Check applicable 
control module power 
and ground circuit. If 
circuit is OK, substitute 
a known-good 
applicable control 
module and recheck.

4E-32 ABS: 

DTC U1100: Lost Communication with ECM (Reception Error)

S5JB0E4504021

Wiring Diagram
Refer to “DTC U1073: Control Module Communication Bus Off”.

DTC Detecting Condition
Reception error of communication data for ECM is detected more than specified time continuously.

DTC Troubleshooting

Step

Action

Yes

No

1

Was “ABS Check” performed?

Go to Step 2.

Go to “ABS Check”.

2

1) Check DTC for ABS (ESP

®).

Is DTC U1073 detected?

Go to “DTC U1073: 
Control Module 
Communication Bus 
Off”.

Go to Step 3.

3

1) Check DTC for ECM.

Is DTC P1674 detected?

Go to “DTC P1674: 
CAN Communication 
(Bus Off Error) in 
Section 1A”.

Go to Step 4.

4

1) Check connection of connectors of all control modules 

communicating by means of CAN.

2) Check DTC for ABS (ESP

®).

Is DTC U1100 detected?

Go to Step 5.

Intermittent trouble. 
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 00 
in related manual”.

5

1) Turn ignition switch to OFF position.
2) Disconnect connectors of ABS (ESP

®) control module 

and ECM communicating by means of CAN.

3) Check CAN communication circuit between ABS 

(ESP

®) control module and ECM for open, short and 

high resistance.

Is CAN communication circuit in good condition?

Go to Step 6.

Repair or replace the 
CAN communication 
line.

6

1) Disconnect connectors of all control modules 

communicating by means of CAN.

2) Check CAN communication circuit between control 

modules other than Step 5 for open, short and high 
resistance.

Is each CAN communication circuit in good condition?

Go to Step 7.

Repair or replace the 
CAN communication 
line.

7

1) Connect connectors of disconnected control modules 

communicating by means of CAN.

2) Disconnect each connector.

• ECM
• TCM (for A/T model)
• BCM
• 4WD control module (if equipped)
• Keyless start control module (if equipped)
• Steering angle sensor (with ESP

®)

3) Check DTC for ABS (ESP

®).

Is DTC U1140 detected?

Check ABS (ESP

®) 

control module power 
and ground circuit. If 
circuits are OK, 
substitute a known-
good ABS (ESP

®) 

hydraulic unit / control 
module assembly and 
recheck.

Check applicable 
control module power 
and ground circuit. If 
circuit is OK, substitute 
a known-good 
applicable control 
module and recheck.

ABS: 4E-33

Repair Instructions

Hydraulic Unit Operation Check

S5JB0E4506001

1) Check that basic brake system other than ABS or 

ESP

® is in good condition.

2) Check that battery voltage is 11 V or higher.
3) Lift up vehicle.
4) Set transmission to neutral and release parking 

brake.

5) Turn each wheel gradually by hand to check if brake 

dragging occurs. If it does, correct.

6) Connect SUZUKI scan tool to data link connector 

(DLC) (1) with ignition switch OFF.

Special tool
(A):  SUZUKI scan tool

7) Turn ignition switch to ON position and select menu 

press / depress in “HYDRAULIC CONTROL TEST” 
under “miscellaneous test” (“MISC. TEST”) mode of 
SUZUKI scan tool. Refer to SUZUKI scan tool 
operator’s manual for further details.

NOTE
“Press” in the menu is functionable only 
vehicle with ESP

®.

 

8) Perform the following checks with help of another 

person.
• Depressurization check

Step on brake pedal (1) and then select testing 
wheel by SUZUKI scan tool and the wheel (2) 
should be turned by another person’s hand. At this 
time, check whether the wheel rotates freely due 
to brake depressurization.

• Pressurization check

Step off brake pedal (1) and then select testing 
wheel by SUZUKI scan tool and the wheel (2) 
should be turned by another person’s hand. At this 
time, check whether the wheel locks due to brake 
pressurization.

NOTE
Pressurization / Depressurization by SUZUKI 
scan tool is available for 0.5 second.

 

9) Check for all 4-wheels condition respectively. If a 

faulty condition is found, replace hydraulic unit / 
control module assembly.

10) After completing the check, turn ignition switch to 

OFF position and disconnect SUZUKI scan tool from 
DLC.

ABS (ESP

®) Hydraulic Unit / Control Module 

Assembly On-Vehicle Inspection

S5JB0E4506003

CAUTION

!

 

Never disassemble ABS (ESP

®) hydraulic 

unit / control module assembly, loosen blind 
plug or remove motor. Performing any of 
these prohibited services will affect original 
performance of ABS (ESP

®) hydraulic unit / 

control module assembly.

 

Check hydraulic unit for fluid leakage.
If any, repair or replace.

(A)

1

I5JB0A450008-01

I4RH01450021-01