Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 27

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

Operation

Condition

Indicator

Buzzer

Differential 

lock 

indicator

OFF

—

• Ignition switch is OFF.
• Transfer is at 4H/N position.

ON

—

• Within 2 seconds after ignition switch is turn ON (checking 

indicator operation).

• Transfer is at 4H-lock/4L-lock position.

Flashes at 0.25 
seconds for 3 
times, at intervals 
of 20 seconds.

Sounds at 1 
second at 
intervals of 20 
seconds.

• The transfer shift position is different for transfer switch.

Flashes at 
intervals of 0.25 
seconds 
continuously

—

• 4WD control module detects DTC of 4WD control system.

Flashes at 
intervals of 0.5 
seconds 
continuously

—

• Transfer is shifting from 4H to 4H-lock.
• Transfer is shifting from 4H-lock to 4H.
• Transfer could not complete shifting to 4H-lock.

4L indicator

OFF

—

• Ignition switch is OFF.
• Transfer is at 4H-lock/N position.

ON

—

• Within 2 seconds after ignition switch is turn ON (checking 

indicator operation).

• Transfer is at 4L-lock position.

Flashes at 0.25 
seconds for 3 
times, at intervals 
of 20 seconds.

Sounds at 1 
second at 
intervals of 20 
seconds.

• The transfer shift position is different for transfer switch.

Flashes at 
intervals of 0.25 
seconds 
continuously

—

• 4WD control module detects DTC of 4WD control system.

Flashes at 
intervals of 0.5 
seconds 
continuously

—

• Transfer is shifting from 4H-lock to 4L-lock.
• Transfer is shifting from 4L-lock to 4H-lock.
• Transfer could not complete shifting to 4L-lock.

N indicator

OFF

—

• Ignition switch is OFF.
• Transfer is at 4H/4H-lock/4L-lock position.

ON

—

• Within 2 seconds after ignition switch is turn ON (checking 

indicator operation).

• Transfer is at N position.

Flashes at 0.25 
seconds for 3 
times, at intervals 
of 20 seconds.

Sounds at 1 
second at 
intervals of 20 
seconds.

• The transfer shift position is different for transfer switch.

Flashes at 
intervals of 0.2 
seconds 
continuously

—

• 4WD control module detects DTC of 4WD control system.

Flashes at 0.5 
seconds 
continuously

—

• Transfer could not complete shifting to N.

—

—

Sounds at 0.2 
seconds for 2 
times, at intervals 
of 3 seconds.

• Transfer is at N position.

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-4

Function of 4WD Control System Component

S5JB0E3311004

4WD Control System Operation

S5JB0E3311005

Instead of the transfer shift lever assembly, the transfer position (4H, 4H-lock, N and 4L-lock) is shifted automatically 
by operating the transfer switch.
The 4WD control module operates the transfer shift actuator according to the transfer switch operation.

Part Name

Function

4L/N switch

Detects transfer shift position combining center differential lock 
switch.

Center differential lock switch

Detects transfer shift position combining 4L/N switch.

Transfer switch

Shifts transfer shift position.

N indicator

Indicates transfer is at N position or not.

4L indicator

Indicates transfer is at 4L-lock position or not.

Differential lock indicator

Indicates transfer is at 4H-lock, 4L-lock or not.

Transmission range sensor (N position) (for A/T 
model)

Detects A/T is at N range or not.

CPP switch

Detects clutch pedal is depressed or not.

Buzzer incorporated into BCM

• Indicates transfer is at “N” position.
• Warns of prohibited shift operation.

4WD control module

• Controls transfer shifting.
• Diagnoses 4WD control system components.
• Output operation signal of indicators and buzzer to BCM.

Transfer shift actuator

• Consists of transfer shift actuator motor and transfer shift 

actuator motor position switch.

• Shifts transfer shift position operating High / Low shift fork and 

differential lock shift fork via cams.

• Detects transfer shift actuator motor position.

Diagnosis connector

Indicates DTC on indicators when grounding its diagnosis 
terminal.

3C-5 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

4H (4WD High) Position
The driving force from the transmission is transmitted to the transfer input gear. As the center LSD case and transfer 
input gear are engaged via the reduction shift sleeve at this time, the driving force transmitted from the transfer input 
gear to the rear output shaft rotates them at the same speed.
Also, driving force from the center LSD is transmitted to the front drive shaft through front drive sprocket. Then, the 
front drive sprocket rotates the front output shaft via the drive chain.

[A]

[B]

1

2

5

4

4

3

5

9

8

6

7

11

12

13

14

15

10

I5JB0A332003-02

[A]: Transfer position indicator 

4. Shift fork pin

9. Reduction shift sleeve

14. Drive chain

[B]: Transfer switch

5. Shift cam

10. Center LSD case

15. Front output shaft

1. 4L/N switch

6. High / Low shift fork

11. Front drive shaft

2. Center differential lock switch

7. Differential lock shift fork

12. Front drive sprocket

3. Transfer actuator

8. Input gear

13. Rear output shaft

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-6

4H-lock (4WD High Center Differential Lock) Position
When 4H-lock position is selected from 4H position by turning the transfer switch, the transfer shift control actuator 
motor runs and shift cam rotates in the arrow direction “A”. The shift cam shifts the differential lock shift fork in the 
arrow direction “B”, and the differential lock clutch sleeve also moves in the arrow direction “B”.
The driving force from the transmission is transmitted from the transfer input gear to the rear output shaft, as in the 
case of 4H position. Also, as the front drive shaft and front drive sprocket bush are engaged via differential lock clutch 
sleeve, the driving force from the input gear is locked and transmitted to the rear output shaft.

B

[A]

[B]

1

2

4

3

5

7

10

6

8

9

11

12

13

14

A

4

5

I5JB0A332004-03

[A]: Transfer position indicator

3. Transfer actuator

7. Input gear

11. Rear output shaft

[B]: Transfer switch

4. Shift fork pin

8. Differential lock clutch sleeve

12. Front drive shaft

1. 4L/N switch

5. Shift cam

9. Front drive sprocket bush

13. Drive chain

2. Center differential lock switch

6. Differential lock shift fork

10. Front drive sprocket

14. Front output shaft