Suzuki Grand Vitara JB416 / JB420. Manual — part 181

3C-38 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

DTC C1230: Transfer Actuator Circuit Malfunction

S5JB0A3314047

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Select transfer switch to “4H” position and keep its position for 10 seconds. Similarly select transfer switch to “4H-

lock”, “N” and “4L-lock” position.

3) Check DTC.

Troubleshooting

5V

12V

E91-2

5V

YEL

RED/BLK

BLU

M

E91-3

E91-25

E91-26

RED

E91-24

BLK/YEL

1

2

3

C54-1

C54-4

C54-2

C54-3

C54-5

4

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]

1

2

3

4

5

6

[B]

I5JB0A332017-01

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

2. Transfer shift actuator motor position switch

[B]: Transfer shift actuator connector “C54” (engine harness side) (viewed from harness side)

3. Transfer shift actuator motor

1. Transfer shift actuator

4. 4WD control module

DTC detecting condition

Trouble area

• Position switch in transfer shift actuator is not changed for 3

seconds even if command signal of motor relay for transfer
shift actuator (included in 4WD control module) is turned on.

or
• Monitor signal from motor relay of transfer shift actuator

(included in 4WD control module) is inconsistent with
command signal to motor relay of transfer shift actuator.

• Transfer shift actuator
• Transfer shift actuator 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)”.

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-39

DTC C1237: Center Differential Lock Switch Circuit Open

S5JB0A3314048

Wiring Diagram

2

Transfer shift actuator circuit check
1) Disconnect transfer shift actuator connector “C54” with

ignition switch OFF.

2) Check for proper connection to “C54-1” and “C54-4”

terminals of transfer shift actuator connector.

3) If connection is OK, measure voltage between “C54-1”

or “C54-4” terminal of transfer shift actuator connector
and vehicle body ground.

Is it 10 – 14 V?

Go to Step 3.

Go to Step 4.

3

Transfer shift actuator check
1) Check transfer shift actuator referring to “Transfer

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

Is actuator in good condition?

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

Replace transfer shift
actuator.

4

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

connector “E91” with ignition switch OFF.

2) Check for open and high resistance or shorted to ground

in related circuits.
• Between “C54-1” terminal of transfer shift actuator

connector and “E91-22” terminal of 4WD control
module connector

• Between “C54-4” terminal of transfer shift actuator

connector and “E91-3” terminal of 4WD control
module connector

Are they in good condition?

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

Repair circuit.

Step

Action

Yes

No

IG

E91-13

E91-14

RED/GRN

PNK/WHT

2

3

4

12V

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]

I5JB0A332018-01

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

3. 4L/N switch

1. 4WD control module

4. Center differential lock switch

2. TCM

3C-40 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Select transfer switch to “4H” position and keep its position for 1 min.
3) Check DTC.

Troubleshooting

DTC detecting condition

Trouble area

Though transfer shift actuator motor position switch is “4H”
position, the ON signal is not input from the center differential
lock switch.

• Center differential lock switch
• Center differential lock 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

Center differential lock switch circuit check
1) Disconnect center differential lock switch connector with

ignition switch OFF.

2) Check for proper connection to terminal of center

differential lock switch connector.

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

GRN” terminal of center differential lock switch
connector and vehicle body ground with ignition switch
ON.

Is it 10 – 14 V?

Go to Step 3.

Go to Step 4.

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

Ω

or less?

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

“RED/GRN” wire is
open or high resistance.

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-41

DTC C1238: Center Differential Lock Switch Circuit Short

S5JB0A3314049

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Select transfer switch to “4L-lock” position and keep its position for 1 min.
3) Check DTC.

Troubleshooting

IG

E91-13

E91-14

RED/GRN

PNK/WHT

2

3

4

12V

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]

I5JB0A332018-01

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

3. 4L/N switch

1. 4WD control module

4. Center differential lock switch

2. TCM

DTC detecting condition

Trouble area

Though transfer shift actuator motor position switch is “4L-lock”
position, the OFF signal is not input from the center differential
lock switch.

• Center differential lock switch
• Center differential lock 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

Center differential lock switch circuit check
1) Disconnect center differential lock switch connector with

ignition switch OFF.

2) Check for proper connection to terminal of center

differential lock switch connector.

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

GRN” terminal of center differential lock switch
connector and vehicle body ground with ignition switch
ON.

Is it 10 – 14 V?

Go to Step 3.

Go to Step 4.