Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 9

1A-32 Engine General Information and Diagnosis: 

DTC P1674: CAN Communication (Bus Off Error)

S5JB0E1104064

Wiring Diagram

WHT

RED

WHT

RED

G44-18

G44-19

G44

[A]

[B]

[C]

[H]

[G]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

WHT/BLU

WHT/BLU

WHT/RED

WHT/RED E23-4

E23-19

WHT

RED

WHT

RED

E92-17

E92-7

WHT

RED

E91-22
E91-23

WHT

RED

RED

G31-1
G31-3

G31-4

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

E23

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

[I]

E53

[E]

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

G31-2

WHT

1

2

3

4

9

5

6

8

7

[K]

E03-12

E03-10

E03-6

E03-8

10

11

[L]

E53-13

E53-42

E53-44

E53-46

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

33

34

35

36

37

38

39

40

32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

[D]

8 7

6 5 4 3

2 1

9

10

11

12

13

14

15

16

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

[J]

G45

10 9

3 2 1

WHT

RED

G45-9
G45-10

G28-8

G28-10

I5JB0D110007-01

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

1. BCM

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

2. 4WD control module (if equipped)

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

3. TCM (for A/T model)

[D]: DLC (viewed from terminal side)

4. Keyless start control module (if equipped)

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

5. DLC

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

6. ECM

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

7. ABS hydraulic unit / control module assembly

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

8. Combination meter

[I]: ESP

® control module connector (viewed from harness side)

9. CAN circuit junction connector

[J]: Steering angle sensor connector (viewed from harness side) 

10. ESP

® control module

[K]: Vehicle without ESP

®

11. Steering angle sensor (for vehicle with ESP

®)

[L]: Vehicle with ESP

®

Engine General Information and Diagnosis:  1A-33

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 in related manual”.

 

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  or  ESP

® control module 

• 4WD control module (if equipped)
• Combination meter
• CAN communication line circuit
• Steering angle sensor (for vehicle with ESP

®)

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 in related 
manual”.

2

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

OFF.

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

® control 

module, 4WD control module (if equipped), 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, 
U1126, U1139, U1140, U1144 in BCM, ABS / ESP

®

 control 

module and 4WD control module (if equipped) and DTC 
No.31 / 33 in keyless start control module (if equipped))?

Go to applicable DTC 
diag. flow.

Go to Step 3.

1A-34 Engine General Information and Diagnosis: 

3

ECM, TCM (for A/T model), BCM, ABS / ESP

® control 

module, 4WD control module (if equipped), combination 
meter, keyless start control module (if equipped) and 
steering angle sensor (for vehicle with ESP

®) 

connectors check
1) Check for proper connection at each ECM, TCM (for A/T 

model), BCM, ABS / ESP

® control module, 4WD control 

module (if equipped), combination meter, keyless start 
control module (if equipped) and steering angle sensor 
(for vehicle with ESP

®) 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 
in related manual”.

4

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

Power and Ground Circuit Check in related manual”.

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 / ESP

® 

control module, 4WD control module (if equipped) and 
keyless start control module (if equipped) (bus off)
1) Check DTC(s) in TCM (for A/T model), ABS / ESP

® 

control module, 4WD control module (if equipped) and 
BCM.

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS / ESP

®

 control module and 4WD control module 

(if equipped) 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 / ESP

® control 

module and 4WD control module (if equipped) for 
DTC(s).

Is there DTC(s) P1774 in TCM (for A/T model), U1073 in 
BCM, ABS / ESP

®

 control module, 4WD control module (if 

equipped) and/or DTC No.33 in keyless start control module 
(if equipped)?

Go to Step 7.

CAN communication 
circuit wire between 
ECM and ABS / ESP

® 

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.

CAN communication 
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.

CAN communication 
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.

Step

Action

Yes

No

Engine General Information and Diagnosis:  1A-35

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.

CAN communication 
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.

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.

CAN communication 
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 (if 

equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 12.

CAN communication 
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 DTC check

1) Disconnect connector from steering angle sensor 

(vehicle equipped with ESP

® control module) with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1674?

Go to Step 13.

CAN communication 
circuit wire between 
steering angle sensor 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, check steering 
angle sensor power and 
ground circuits. If 
circuits are OK, 
substitute a known-
good steering angle 
sensor and recheck.

13 ABS or EPS

® control module check

1) Measure resistance at following connector terminals.

• Between “WHT/BLU” terminal and “WHT” terminal of 

ABS or ESP

® control module connector.

• Between “WHT/RED” terminal and “RED” terminal of 

ABS or ESP

® control module connector.

Is measured resistance below 1 

Ω

?

Go to Step 14.

Substitute a known-
good ABS or ESP

® 

control module and 
recheck.

Step

Action

Yes

No