Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual — part 37

3C-43 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Start engine and drive vehicle at 30 km/h (19 mph) or more vehicle speed at least for 1 min.
3) Stop vehicle and check DTC.

Troubleshooting

DTC C1243: Internal Circuit Malfunction of 4WD Control Module

S5JB0E3314024

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Turn ignition switch to ON position for 60 seconds.
3) Check DTC.

Troubleshooting
Substitute a known-good 4WD control module and recheck.

DTC detecting condition

Trouble area

4WD control module power supply voltage is out of specification
while vehicle is running at 20 km/h (12 mph) or more.

• 4WD control module power supply circuit

Step

Action

Yes

No

1

Was “4WD control system check” performed?

Go to Step 2.

Go to “4WD Control
System Check: Motor-
Shift Type (Transfer with
Shift Actuator)”.

2

4WD control module power circuit check
1) Disconnect 4WD control module connector with ignition

switch OFF.

2) Check for proper connection to “E91” terminal of 4WD

control module connector.

3) If connection is OK, measure voltage between “E91-11”

terminal of 4WD control module connector and vehicle
body ground with ignition switch ON.

Is it 10 – 14 V?

Poor “E91-11”
connection or
intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”. If
wire and connections
are OK, substitute a
known-good 4WD
control module and
recheck.

“4WD” fuse blown,
“WHT” or “BLK” wire is
circuit open or circuit
short.

DTC detecting condition

Trouble area

EEPROM Error

• 4WD control module

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-44

DTC C1246: Clutch Pedal Position (CPP) Switch Circuit Short

S5JB0E3314025

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Start engine and drive vehicle at 50 km/h (31 mile/h) or more vehicle speed at least for 1 min.
3) Stop vehicle and check DTC.

12V

E91-7

BLK/ORN

1

2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

[A]

I5JB0A332020-01

[A]: 4WD control module connector “E91” (viewed from harness side)

2. 4WD control module

1. CPP switch

DTC detecting condition

Trouble area

CPP switch signal is input when vehicle speed is 30 km/h (19
mph).

• CPP switch
• CPP switch circuit
• 4WD control module

3C-45 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

Troubleshooting

Step

Action

Yes

No

1

Was “4WD control system check” performed?

Go to Step 2.

Go to “4WD Control
System Check: Motor-
Shift Type (Transfer with
Shift Actuator)”.

2

CPP switch circuit check
1) Disconnect CPP switch connector with ignition switch

OFF.

2) Check for proper connection to terminal of CPP switch

connector.

3) If connection is OK, measure voltage between “BLK/

ORN” terminal of CPP switch connector and vehicle
body ground with ignition switch ON.

Is it 10 – 14 V?

Go to Step 3.

Go to Step 4.

3

CPP switch check
1) Check CPP switch referring to “Clutch Pedal Position

(CPP) Switch Inspection and Adjustment in Section 5C
in related manual”.

Is switch in good condition?

Substitute a known-
good 4WD control
module and recheck.

Replace CPP switch.

4

Wire harness check
1) Disconnect connector from 4WD control module

connector “E91” with ignition switch OFF.

2) Check for proper connection to “E91-7” terminal of 4WD

control module connector.

3) If OK, measure resistance between “BLK/ORN” terminal

of CPP switch connector and “E91-7” terminal of 4WD
control module connector.

Is it 1 M

Ω

or more?

Substitute a known-
good 4WD control
module and recheck.

“BLK/ORN” wire is
shorted to ground
circuit.

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-46

DTC U1073: Control Module Communication Bus Off

S5JB0E3314026

Wiring Diagram

WHT

RED

WHT

RED

G44-18

G44-19

G44

[A]

[B]

[C]

[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

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

G31-1
G31-3

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

[E]

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

[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

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

[F]

E91

WHT

RED

G31-2
G31-4

[H]

8

7

6

5

4

3

2

1

9

10

11

12

13

14

15

16

1

2

3

4

8

5

6

7

[I]

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

9

E53-13

E53-42

E53-44

E53-46

I6JB01331002-02

[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

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

3. TCM (for A/T model)