Suzuki Grand Vitara JB627. Manual - part 157

3C-32 Transfer: 

Troubleshooting

Step

Action

Yes

No

1

Was “4WD control system check” performed?

Go to Step 2.

Go to “4WD Control 
System Check”.

2

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

ignition switch OFF.

2) Check for proper connection to “C54-2”, “C54-3” and 

“C54-5” terminals of transfer shift actuator connector.

3) If connection is OK, measure voltage between “G54-2”, 

“G54-3” or “G54-5” terminal of transfer switch connector 
and vehicle body ground with ignition switch ON.

Is it approx. 5 V?

Go to Step 3.

Go to Step 4.

3

Transfer shift actuator position switch check
1) Check transfer shift actuator position switch referring to 

“Transfer Assembly Inspection”.

Is actuator in good condition?

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

Faulty actuator position 
switch. 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 in related circuits.

• Between “C54-2” terminal of transfer shift actuator 

connector and “E91-25” terminal of 4WD control 
module connector

• Between “C54-3” terminal of transfer shift actuator 

connector and “E91-26” terminal of 4WD control 
module connector

• Between “C54-5” terminal of transfer shift actuator 

connector and “E91-24” terminal of 4WD control 
module connector

Are they it in good condition?

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

Repair circuit.

Transfer: 3C-33

DTC C1224 / C1236: Transfer Shift Actuator Motor Position Switch 1 Circuit Short / Transfer Shift 
Actuator Motor Position Switch 2 Circuit Short

S6JB0B3304017

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.

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

Transfer shift actuator motor position switch signal voltage 0.6 V 
or less.

• Transfer shift actuator motor position switch
• Transfer shift actuator motor position switch 

circuit

• 4WD control module

3C-34 Transfer: 

Troubleshooting

Step

Action

Yes

No

1

Was “4WD control system check” performed?

Go to Step 2.

Go to “4WD Control 
System Check”.

2

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

ignition switch OFF.

2) Check for proper connection to “C54-2”, “C54-3” and 

“C54-5” terminals of transfer shift actuator connector.

3) If connection is OK, measure voltage between “G54-2”, 

“G54-3” or “G54-5” terminal of transfer switch connector 
and vehicle body ground with ignition switch ON.

Is it approx. 5 V?

Go to Step 3.

Go to Step 4.

3

Transfer shift actuator position switch check
1) Check transfer shift actuator position switch referring to 

“Transfer Assembly Inspection”.

Is actuator in good condition?

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

Faulty actuator position 
switch. Replace transfer 
shift actuator.

4

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

connector “E91” with ignition switch OFF.

2) Check for shorted to ground in related circuits.

• Between “C54-2” terminal of transfer shift actuator 

connector and “E91-25” terminal of 4WD control 
module connector

• Between “C54-3” terminal of transfer shift actuator 

connector and “E91-26” terminal of 4WD control 
module connector

• Between “C54-5” terminal of transfer shift actuator 

connector and “E91-24” terminal of 4WD control 
module connector

Are they in good condition?

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

Repair circuit.

Transfer: 3C-35

DTC C1227: 4L/N Switch Circuit Open

S6JB0B3304018

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 ON signal is not input from the 4L/N switch.

• 4L/N switch
• 4L/N 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”.

2

4L/N switch circuit check
1) Disconnect 4L/N switch connector with ignition switch 

OFF.

2) Check for proper connection to terminal of 4L/N switch 

connector.

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

WHT” terminal of 4L/N switch connector and vehicle 
body ground with ignition switch ON.

Is it 10 – 14 V?

Go to Step 3.

Go to Step 4.

3

4L/N switch check
1) Check 4L/N switch referring to “Transfer Assembly 

Inspection”.

Is switch in good condition?

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

Replace 4L/N switch.