Suzuki Grand Vitara JB419. Manual - part 76

Transfer: 3C-2

General Description

Input / Output Signal Table of 4WD Control Module

S5JB0B3301008

4WD control module outputs the following signals to actuators, indicators, warning buzzer, according to the transfer 
switch operation.

CAN Communication System Description

S5JB0B3301010

Refer to “CAN Communication System Description in Section 1A”.

4WD Control Module Transmission Data

4WD Control Module Reception Data

Output signal (to each component parts)

Transfer 

shift 

actuator

Differential 

lock 

indicator

4L indicator N indicator

Warning 

buzzer

Input signal

Transfer switch

{

{

{

{

{

CPP switch

{

{

{

{

TCM

{

{

{

{

ABS / ESP

® hydraulic unit / 

control module

{

{

{

{

{

4L/N switch

{

{

{

Center differential lock switch

{

{

BCM

Combination 

Meter

Transmit

DATA

4WD 

Buzzer on reques

Lock indication status

Neutral Indication Status

Low indication status

4WD diagnostic trouble codes

control

module

ABS control

 module

 (Non-ESP® model)  

ESP® control

 module 

(ESP® model)  

4WD shift position

I5JB0A332010-02

ECM

TCM

DATA

Receive

Engine speed signal

Vehicle speed signal

Brake pedal switch active

4WD 

control

module

Transmission gear

selector position

Wheel speed pulse 
(front right)             

Wheel speed pulse 
(front left)               

Wheel speed pulse 

(rear right)              

Wheel speed pulse 
(rear left)                

ABS active

ABS control module  

(Non-ESP® model)

ESP® control module  

(ESP® model)

ESP® status signal

I6JB01331001-02

3C-3 Transfer: 

Schematic and Routing Diagram

4WD Control System Wiring Circuit Diagram

S5JB0B3302001

5V

5V

IG

5V

12V

E91-2

5V

12V

12V

+BB

YEL

RED/BLK

BLU

M

E91-3

E91-25

E91-26

RED

E91-24

BLK/YEL

E91-7

BLK/ORN

E91-21

PPL/WHT

E91-22

E91-23

RED

WHT

E91-18

E91-19

E91-20

E91-13

E91-14

E91-12

E91-11

E91-10

E91-1

BLK

BLK

WHT

BLK/WHT

RED/GRN

PNK/WHT

BLU/ORN

BLU/BLK

LT GRN

12V

12V

G59-2

G59-3

G59-4

C54-1

C54-4

C54-2

C54-3

C54-5

WHT/RED

WHT/BLU

1

2

3

4

5

6

7

8

9

10

12

11

13

14

15

17

18

19

20

21

23

22

16

E91-8

PNK

I5JB0A332007-03

1. Transfer actuator

9. ABS / ESP

® hydraulic unit/control 

module

17. DLC

2. Transfer actuator position switch

10. ECM

18. “IG COIL” fuse

3. Transfer actuator motor

11. 4WD control module

19. Ignition switch

4. CPP switch (for M/T model)

12. Transfer switch

20. “4WD” fuse

5. BCM

13. TCM (for A/T model)

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

6. TCM (for A/T model)

14. 4L/N switch

22. Main fuse box

7. Combination meter

15. Center differential lock switch

23. Starting motor

8. Keyless start control module (if equipped)

16. Diagnosis connector (if equipped)

Transfer: 3C-4

Terminal Arrangement of 4WD Control Module

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]

I4JA01332038-01

[A]: Connector “E91” viewed from harness side

Terminal

Circuit

Terminal

Circuit

E91-1

Ground

E91-18

Transfer switch 1

E91-2

Transfer actuator motor 1

E91-19

Transfer switch 2

E91-3

Transfer actuator motor 2

E91-20

Transfer switch 3

E91-7

CPP switch

E91-21

Data link connector (DLC)

E91-8

Diagnosis connector

E91-22

CAN communication line (High)

E91-10

Ground

E91-23

CAN communication line (Low)

E91-11

Power source for internal memory

E91-24

Transfer actuator position switch (ground)

E91-12

Ignition switch

E91-25

Transfer actuator position switch 1 (power)

E91-13

4L/N switch

E91-26

Transfer actuator position switch 2 (power)

E91-14

Center differential lock switch

3C-5 Transfer: 

Diagnostic Information and Procedures

Visual Inspection

S5JB0B3304004

Check the following parts and systems visually.

DTC Table

S5JB0B3304007

Inspection Item

Referring

• Front differential oil ---- level, leakage

“Front Differential Oil Change: Front in Section 3B in 
related manual”

• Rear differential oil ---- level, leakage

“Rear Differential Oil Change: Rear in Section 3B in 
related manual”

• Transfer gear oil ---- level, leakage

“Transfer Oil Change in related manual”

• Manual transmission oil ---- level, leakage

“Manual Transmission Oil Change in Section 5B”

• Transfer mounting(s) ---- wear and looseness
• Fuses ---- burning
• Battery ---- fluid level, corrosion of terminal

“Battery Inspection in Section 1J”

• Connectors of electric wire harness ---- disconnection, 

friction

“Intermittent and Poor Connection Inspection in Section 
00 in related manual”

• Other parts that can be checked visually

DTC No.

Detecting item

Detecting condition

(DTC will set when detecting)

Transfer 
position 

indicators

)

 C1213

Transfer switch circuit open

Different switch combination from specification is 
detected.

{

)

 C1214

Transfer switch circuit short

Different switch combination from specification is 
detected.

{

)

 C1223

Transfer shift actuator motor 
position switch 1 circuit open

Actuator position switch signal voltage 4.2 V or 
more.

{

)

 C1224

Transfer shift actuator motor 
position switch 1 circuit short

Actuator position switch signal voltage 0.6 V or 
less.

{

)

 C1227

4L/N switch circuit open

Though actuator position switch is “4L-lock” 
position, the ON signal is not input from the 4L/N 
switch.

{

)

 C1228

4L/N switch circuit short

Though actuator position switch is “4L-lock” 
position, the OFF signal is not input from the 4L/
N switch.

{

)

 C1230

Transfer actuator circuit 
malfunction

• 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.

{

)

 C1235

Transfer shift actuator motor 
position switch 2 circuit open

Actuator position switch signal voltage 4.2 V or 
more.

{

)

 C1236

Transfer shift actuator motor 
position switch 2 circuit short

Actuator position switch signal voltage 0.6 V or 
less.

{

)

 C1237

Center differential lock switch 
circuit open

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

{

)

 C1238

Center differential lock switch 
circuit short

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

{

)

 C1240

4WD control module power 
supply circuit malfunction

Battery voltage is lower than lower limit voltage 
for 4WD control module diagnosis.

{