Suzuki Grand Vitara JB416 / JB420. Manual - part 213

4E-29 ABS: 

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”.

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”.

4

1) Turn ignition switch to OFF position.
2) Connect connectors to ABS hydraulic unit / control 

module, BCM, TCM (for A/T model), 4WD control 
module (if equipped), keyless start control module (if 
equipped) and combination meter.

3) Recheck DTC for ABS.

Is DTC U1073 detected?

Go to Step 5.

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

5

1) Turn ignition switch to OFF position.
2) Disconnect connectors from BCM.
3) Recheck DTC for ABS.

Is DTC U1073 detected?

Go to Step 6.

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

6

NOTE
If vehicle equipped with M/T, go to Step 7.

 

1) Turn ignition switch to OFF position.
2) Disconnect connectors from TCM.
3) Recheck DTC for ABS.

Is DTC U1073 detected?

Go to Step 7.

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

7

NOTE
If vehicle is not selectable 4WD (motor shift 
type), go to Step 8.

 

1) Turn ignition switch to OFF position.
2) Disconnect connectors from 4WD control module.
3) Recheck DTC for ABS.

Is DTC U1073 detected?

Go to Step 8.

Check 4WD control 
module power and 
ground circuit. If circuit 
is OK, substitute a 
known-good 4WD 
control module and 
recheck.

8

NOTE
If vehicle is not equipped keyless start system, 
go to Step 9.

 

1) Turn ignition switch to OFF position.
2) Disconnect connectors from keyless start control 

module.

3) Recheck DTC for ABS.

Is DTC U1073 detected?

Go to Step 9.

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

ABS: 4E-30

DTC U1100: Lost Communication with ECM (Reception Error)

S5JB0A4504021

Wiring Diagram

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

DTC Troubleshooting

9

1) Turn ignition switch to OFF position.
2) Disconnect connectors from combination meter.
3) Recheck DTC for ABS.

Is DTC U1073 detected?

Check ABS power and 
ground circuit. If circuit 
is OK, substitute a 
known-good ABS 
hydraulic unit / control 
module assembly and 
recheck.

Check combination 
meter power and 
ground circuit. If circuit 
is OK, substitute a 
known-good 
combination meter and 
recheck.

Step

Action

Yes

No

WHT/BLU

WHT/RED

WHT/BLU

WHT/RED

E03-10

E03-8

12V

12V

E03-1

E03-14

E03-7

E03-13

E03-26

GRN/ORN

BLK/YEL

WHT/GRN

WHT/BLU

WHT/RED

[A]

BLK

BLK

E03

[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

E23-4

E23-19

6

5

1

2

3

4

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

I5JB0A450021-02

[A]: ABS hydraulic unit / control module connector 

(viewed from terminal side)

2. Main fuse box

5. ABS hydraulic unit / control module assembly

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

3. Ignition switch

6. ECM

1. Battery

4. Circuit fuse (in junction block assembly)

Step

Action

Yes

No

1

Was “ABS Check” performed?

Go to Step 2.

Go to “ABS Check”.

2

Check DTC in ABS.

Is DTC U1073 detected?

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

Go to Step 3.

3

1) Check for proper connection at each ABS and ECM 

terminals with ignition switch turned OFF.

2) If connections are OK, recheck ABS for DTC with engine 

running.

Is there DTC U1100?

Go to Step 4.

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

4

Check DTC for ECM.

Is DTC P1674, P1676 or P1678 detected?

Go to applicable DTC 
diag flow.

Go to Step 5.

4E-31 ABS: 

Repair Instructions

ABS Hydraulic Unit Operation Check

S5JB0A4506001

1) Check that basic brake system other than ABS 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 

to “HYDRAULIC CONTROL TEST” under 
“miscellaneous test” (“MISC. TEST”) mode of 
SUZUKI scan tool.

8) Perform the following checks with help of another 

person.
Brake pedal (1) should be depressed 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 that:
• Operation sound of solenoid is heard and the 

wheel turns only about 0.5 sec. (Brake force is 
depressurized).

• Operation sound of pump motor is heard and 

pulsation is felt at brake pedal.

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.

5

1) Turn ignition switch to OFF position.
2) Disconnect connectors of ABS hydraulic unit / control 

module and ECM.

3) Check CAN communication circuit between ABS and 

ECM for open, short and high resistance.

Is CAN communication circuit in good condition?

Go to Step 6.

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

6

1) Connect connectors of ABS hydraulic unit / control 

module and ECM.

2) Check DTCs for BCM, TCM, 4WD control module (if 

equipped).

Is DTC U1100 in BCM, DTC P1777 in TCM (for A/T model) 
and/or DTC U1100 in 4WD control module (if equipped) 
detected?

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

Check ABS power and 
ground circuit. If circuit 
is OK, substitute a 
known-good ABS 
hydraulic unit / control 
module assembly and 
recheck.

Step

Action

Yes

No

(A)

1

I5JB0A450008-01

I4RH01450021-01

ABS: 4E-32

ABS Hydraulic Unit / Control Module Assembly Components

S5JB0A4506002

CAUTION

!

 

Never disassemble ABS hydraulic unit / control module assembly, loosen blind plug or remove motor. 
Performing any of these prohibited services will affect original performance of ABS hydraulic unit / 
control module assembly.

 

ABS Hydraulic Unit / Control Module Assembly On-Vehicle Inspection

S5JB0A4506003

CAUTION

!

 

Never disassemble ABS hydraulic unit / control module assembly, loosen blind plug or remove motor. 
Performing any of these prohibited services will affect original performance of ABS hydraulic unit / 
control module assembly.

 

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

3

1

(a)

(b)

(c)

2

(b)

(c)

(a)

I5JB0A450022-01

1. ABS hydraulic unit / control module assembly

3. Connector

:  9 N

⋅m (0.9 kgf-m, 6.5 lb-ft)

2. Bracket

: 16 N

⋅m (1.6 kgf-m, 11.5 lb-ft)

: 25 N

⋅m (2.5 kgf-m, 18.0 lb-ft)