Suzuki Grand Vitara JB416 / JB420. Manual - part 56

1A-173 Engine General Information and Diagnosis: 

DTC P1674: CAN Communication (Bus Off Error)

S5JB0A1104058

Wiring Diagram

G44

[A]

[B]

[C]

[H]

[G]

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

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

17 16

26 25

15 14

6

5

3

4

2

13 12

23 22

24

11 10 9

21 20 19

8 7

18

1

E93

2 1

E23

C37

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

2

26

27

28

15

30

56

48

32 31

34

35

36

37

40

42

3938

44

45

43

41

33

1

12

13

23

8

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

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

G28

[F]

G31

E91

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

1

2

3

10

11

12

16

17

18

15 14 13

19

20

21

25

26

5

6

WHT

RED

WHT

RED

G44-18

G44-19

G28-8

G28-10

WHT/BLU

WHT/BLU

WHT/RED

WHT/RED E23-4

E23-19

WHT

RED E03-12

E03-10

E03-6

E03-8

WHT

RED

E92-17

E92-7

WHT

RED

E91-22
E91-23

WHT

RED

WHT

RED

G31-1
G31-3

G31-2
G31-4

[E]

[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

8

7

6

5

4

3

2

1

9

10

11

12

13

14

15

16

8

1

2

3

4

5

6

7

9

I5JB0A110068-04

[A]: Keyless start control module connector (if equipped) (viewed from harness side)

2. ABS hydraulic unit / control module assembly

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

3. Combination meter

[C]: TCM connector (for A/T model) (viewed from harness side)

4. BCM

[D]: DLC (viewed from terminal side)

5. 4WD control module (for J20 engine)

[E]: ABS hydraulic unit / control module connector (viewed from terminal side) 

6. TCM (for A/T model)

[F]: Combination meter connector (viewed from harness side)

7. Keyless start control module (if equipped)

[G]: 4WD control module connector (viewed from harness side)

8. DLC

[H]: BCM connector (viewed from harness side) 9. CAN 

circuit 

junction 

connector

1. ECM

Engine General Information and Diagnosis:  1A-174

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to 
“Precautions For DTC Troubleshooting”.

 

DTC detecting condition

Trouble area

Transmission error that is inconsistent between 
transmission data and transmission monitor (CAN bus 
monitor) data is detected more than 7 times continuously.
(1 driving detection logic)

• ECM
• BCM
• TCM (for A/T model)
• Keyless start control module (if equipped)
• ABS hydraulic unit / control module assembly
• 4WD control module (for J20 engine)
• Combination meter
• CAN communication line circuit

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check” 
performed?

Go to Step 2.

Go to “Engine and 
Emission Control 
System Check”.

2

DTC check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Check ECM, TCM (for A/T model), ABS hydraulic unit / 

control module assembly, 4WD control module (for J20 
engine), keyless start control module (if equipped) and 
BCM for DTC.

Is there any DTC(s) other than CAN communication DTC(s) 
at each control module (other than DTC P1618, P1674, 
P1676, P1678, P1685 in ECM, DTC P1774, P1777, P1778 
in TCM (for A/T model), DTC U1073, U1100, U1101, U1121 
in BCM, ABS hydraulic unit / control module assembly and 
4WD control module (for J20 engine) and DTC No.31 / 33 in 
keyless start control module (if equipped))?

Go to applicable DTC 
diag. flow.

Go to Step 3.

3

ECM, TCM (for A/T model), BCM, ABS hydraulic unit / 
control module assembly, 4WD control module (for J20 
engine), combination meter and keyless start control 
module (if equipped) connectors check
1) Check for proper connection at each ECM, TCM (for A/T 

model), BCM, ABS hydraulic unit / control module 
assembly, 4WD control module (for J20 engine), 
combination meter and keyless start control module (if 
equipped) connector terminals with ignition switch 
turned OFF.

2) If connections are OK, recheck ECM for DTC with 

engine running.

Is there DTC P1674?

Go to Step 4.

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

1A-175 Engine General Information and Diagnosis: 

4

ECM power and ground circuit check
1) Check ECM power and ground circuit referring to “ECM 

Power and Ground Circuit Check”.

Are they in good condition?

Go to Step 5.

Repair ECM power and/
or ground circuits.

5

DTC check in BCM, TCM (for A/T model), ABS hydraulic 
unit / control module assembly, 4WD control module 
(for J20 engine) and keyless start control module (if 
equipped) (bus off)
1) Check DTC(s) in TCM (for A/T model), ABS hydraulic 

unit / control module assembly, 4WD control module (for 
J20 engine) and BCM.

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS hydraulic unit / control module assembly and 
4WD control module (for J20 engine) and/or DTC No.33 in 
keyless start control module (if equipped)?

Go to Step 6.

Go to Step 7.

6

DTC check in ECM (bus off)
1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Check TCM (for A/T model), BCM, ABS hydraulic unit / 

control module assembly and 4WD control module (for 
J20 engine) for DTC(s).

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS hydraulic unit / control module assembly and 
4WD control module (for J20 engine) and/or DTC No.33 in 
keyless start control module (if equipped)?

Go to Step 7.

“E23-4” or “E23-19” 
circuit wire between 
ECM and ABS hydraulic 
unit / control module is 
open or high resistance. 
If wires are OK, 
substitute a known-
good ECM and recheck.

7

DTC check in ECM
1) Connect connectors to ECM and disconnect connector 

from BCM with ignition switch turned OFF.

2) Check ECM for DTC(s).

Is there DTC P1674?

Go to Step 8.

“G31-1” or “G31-3” 
circuit wire between 
BCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good BCM and recheck.

8

DTC check in ECM
1) Disconnect connectors from TCM (for A/T model) with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 9.

“E92-17” or “E92-7” 
circuit wire between 
TCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good TCM (for A/T 
model) and recheck.

9

DTC check in ECM
1) Disconnect connector from keyless start control module 

(if equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 10.

“G44-19” or “G44-18” 
circuit wire between 
keyless start control 
module and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, 
substitute a known-
good keyless start 
control module and 
recheck.

Step

Action

Yes

No

Engine General Information and Diagnosis:  1A-176

10 DTC check in ECM

1) Disconnect connector from combination meter with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 11.

“G28-10” or “G28-8” 
circuit wire between 
combination meter and 
CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, substitute a 
known-good 
combination meter or 
keyless start control 
module (if equipped) 
and recheck.

11 DTC check in ECM

1) Disconnect connector from 4WD control module (for J20 

engine) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 12.

“E91-22” or “E91-23” 
circuit wire between 
4WD control module 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, substitute a 
known-good 4WD 
control module and 
recheck.

12 ABS hydraulic unit / control module check

1) Measure resistance at following connector terminals.

• Between “E03-8” terminal and “E03-6” terminal of 

ABS hydraulic unit / control module connector.

• Between “E03-10” terminal and “E03-12” terminal of 

ABS hydraulic unit / control module connector.

Is measured resistance below 1 

Ω

?

Go to Step 13.

Substitute a known-
good ABS hydraulic unit 
/ control module and 
recheck.

13 CAN communication line circuit insulation check

1) Disconnect connector from ABS hydraulic unit / control 

module assembly with ignition switch turned OFF.

2) Measure resistance between “E03-6” and “E03-12” 

terminals of ABS hydraulic unit / control module 
connector.

Is resistance infinity?

Go to Step 14.

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

14 CAN communication line circuit insulation check

1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Measure resistance between “E23-4” and “E23-19” 

terminals of ECM connector.

Is resistance infinity?

Go to Step 15.

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

Step

Action

Yes

No