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