Suzuki Grand Vitara JB416 / JB420. Manual - part 182

3C-42 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

DTC C1240: 4WD Control Module Power Supply Circuit Malfunction

S5JB0A3314050

Wiring Diagram

3

Center differential lock switch check
1) Check center differential lock switch referring to 

“Transfer Assembly Inspection: Motor-Shift Type 
(Transfer with Shift Actuator)”.

Is switch in good condition?

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

Replace center 
differential lock switch.

4

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

connector “E91” with ignition switch OFF.

2) Check for proper connection to “E91-14” terminal of 

4WD control module connector.

3) If OK, measure resistance between “RED/GRN” terminal 

of center differential lock switch connector and “E91-14” 
terminal of 4WD control module connector.

Is it 1 M

Ω

 or more?

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

“RED/GRN” wire is 
shorted to ground 
circuit.

Step

Action

Yes

No

5V

+BB

E91-12

E91-11

E91-10

E91-1

BLK

BLK

WHT

BLK/WHT

2

4

6

3

5

7 

1

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]

BLK

I5JB0A332019-01

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

4. “4WD” fuse

1. 4WD control module

5. Shift switch (for A/T model) or CPP switch (for M/T model)

2. “IG COIL” fuse 

6. Main fuse box

3. Ignition switch

7. Starting motor

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

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

S5JB0A3314056

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”. 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

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

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

S5JB0A3314051

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.

Troubleshooting

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

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”.

Is switch in good condition?

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

Replace CPP switch.

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

DTC U1073: Control Module Communication Buss Off

S5JB0A3314052

Wiring Diagram

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.

Step

Action

Yes

No

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

I5JB0A332021-01

[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

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

3. TCM (for A/T model)