Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual - part 32

3C-23 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

Fail-Safe Table

S5JB0E3314008

This function is provided by the safe mechanism that assures safe drive ability even when the actuator, switch, sensor 
or its circuit fails. The following table shows the fail safe function for each fail condition of sensor, actuator, switch, 
4WD control module or its circuit.

Scan Tool Data Definitions

S5JB0E3314010

Vehicle Speed (KM/H, MPH):  

This parameter indicates vehicle speed calculated 
by 4WD control module.

Actuator Pos Sen (Transfer shift actuator motor 

position switch) (4H / 4H-lock / 4L-lock / N / 4H-
lock-4H / 4H-N / N-4L-lock):  
This parameter indicates transfer shift actuator 
motor position switch status detected by 4WD 
control module.

Actuator motor Pos (Transfer shift actuator motor 

position) (4H / 4H-lock / 4L-lock / N):  
This parameter indicates transfer shift actuator 
motor position detected by 4WD control module 
using transfer shift actuator motor position.

Battery voltage (V):  

This parameter indicates battery voltage detected by 
4WD control module.

4L / N switch (ON / OFF):  

This parameter indicates 4L / N switch status 
detected by 4WD control module.

Center diff lock Sw (ON / OFF):  

This parameter indicates center differential lock 
switch status detected by 4WD control module.

N range signal (AT) (ON / OFF):  

This parameter indicates A/T shift position (“N” range 
or not) detected by 4WD control module.

CPP switch (Clutch pedal position switch) (MT) (ON / 

OFF):  
This parameter indicates clutch pedal position switch 
status detected by 4WD control module using CPP 
switch.

Mode switch 1 (Transfer switch) (ON / OFF):  

ON: Transfer switch to N position.
OFF: Transfer switch to other than N position.

Mode switch 2 (Transfer switch) (ON / OFF):  

ON: Transfer switch to other than 4L-lock position.
OFF: Transfer switch to 4L-lock position.

Mode switch 3 (Transfer switch) (ON / OFF):  

ON: Transfer switch to 4H-lock or 4L-lock position.
OFF: Transfer switch to 4H or N position.

Warning buzzer (OFF / N Pos / Error):  

This parameter indicates if buzzer is being 
commanded by 4WD control module.

ABS active (ON / OFF):  

This parameter indicates ABS status detected by 
4WD control module.

ESP

® active (ON / OFF):  

This parameter indicates ESP

® status detected by 

4WD control module.

DTC No.

Trouble Area

Fail-Safe Operation

)

 C1223

Transfer actuator switch 1 circuit open

4WD control module stops outputting of control 
signal to transfer actuator (When shifting, it stops 
outputting after shifting is completed).

)

 C1224

Transfer actuator switch 1 circuit short

)

 C1235

Transfer actuator switch 2 circuit open

)

 C1236

Transfer actuator switch 2 circuit short

)

 C1230

Transfer actuator circuit malfunction

4WD control module stops outputting of control 
signal to transfer actuator.

)

 C1240

4WD control module power supply circuit 
malfunction

)

 C1246

Clutch switch circuit short

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-24

4WD Control Symptom Diagnosis

S5JB0E3314011

Diagnose transfer assembly after performing the following inspections.

1) Perform 4WD control system check referring to “4WD Control System Check: Motor-Shift Type (Transfer with Shift 

Actuator)”.

2) Confirm 4WD control system operation referring to “4WD Control System Operation: Motor-Shift Type (Transfer 

with Shift Actuator)”

Condition

Possible cause

Correction / Reference Item

Transfer does not operate 
(Transfer position 
indicator does not 
operate)

Transfer switch faulty

Check switch referring to “Transfer Switch 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Transfer shift actuator faulty

Check transfer shift actuator referring to 
“Transfer Assembly Inspection: Motor-Shift 
Type (Transfer with Shift Actuator)”.

4L/N switch and/or switch center 
differential lock switch faulty

Check switch referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Transmission range sensor (“N” range) 
faulty (for A/T model)

Adjust or check transmission range sensor 
referring to “Transmission Range Sensor 
Inspection and Adjustment in Section 5A in 
related manual”.

CPP switch faulty (for M/T model)

Check CPP switch referring to “Clutch Pedal 
Position (CPP) Switch Inspection and 
Adjustment in Section 5C in related manual”.

Wiring or grounding faulty

Repair as necessary.

4WD control module faulty

Check 4WD control module referring to 
“Inspection of 4WD Control Module and Its 
Circuits: Motor-Shift Type (Transfer with Shift 
Actuator)”.

Transfer refuses to 
operate (Transfer position 
indicator flashes, and 
then transfer does not 
shift)

Transfer shift actuator faulty

Check transfer shift actuator referring to 
“Transfer Assembly Inspection: Motor-Shift 
Type (Transfer with Shift Actuator)”.

4L/N switch and/or center differential 
lock switch faulty

Check switch referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Distorted control cover shift shaft or shift 
fork

Check shift fork referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Weakened control cover shift shaft 
spring

Check spring referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Distorted or dispositioned control cover 
shift shaft snap ring and washer

Check snap ring and washer referring to 
“Transfer Assembly Inspection: Motor-Shift 
Type (Transfer with Shift Actuator)”.

Worn chamfered tooth on sleeve or gear Check chamfered tooth and gear referring to 

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

Wiring or grounding faulty

Repair as necessary.

4WD control module faulty

Check 4WD control module referring to 
“Inspection of 4WD Control Module and Its 
Circuits: Motor-Shift Type (Transfer with Shift 
Actuator)”.

3C-25 Transfer: Motor-Shift Type (Transfer with Shift Actuator)

Transfer Position Indicator Does Not Come ON at Ignition Switch ON but Engine Stops

S5JB0E3314012

Wiring Diagram

Gear slipping out of mesh Worn control cover shift shaft

Check control cover shift shaft referring to 
“Transfer Assembly Inspection: Motor-Shift 
Type (Transfer with Shift Actuator)”.

Worn shift fork or sleeve

Check shift fork or sleeve referring to “Transfer 
Assembly Inspection: Motor-Shift Type 
(Transfer with Shift Actuator)”.

Weak or damaged control cover shift 
shaft spring

Check spring referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Worn bearings on input gear or counter 
gear

Check bearing referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Worn chamfered tooth on sleeve or gear Check sleeve and gear referring to “Transfer 

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

Missing or disengagement of circlip(s)

Check circlip(s) referring to “Transfer Assembly 
Inspection: Motor-Shift Type (Transfer with 
Shift Actuator)”.

Noise

Damaged or worn bearing(s)

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

Damaged or worn gear(s)

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

Damaged or worn chamfered tooth on 
sleeve or gear

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

Condition

Possible cause

Correction / Reference Item

E91-22
E91-23

RED

WHT

RED

WHT

G28-10

G28-8

1

2

G28-13

PPL/RED

BLK

WHT/GRN

BLK/YEL

8

G28-15

4

6

7

5

3

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

[B]

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]

I5JB0A332015-03

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

4. 4L indicator

[B]: Combination meter connector (viewed from harness side)

5. N indicator

Transfer: Motor-Shift Type (Transfer with Shift Actuator) 3C-26

Circuit Description
Transfer position indicator operates according to the signal from 4WD control module. If the transfer control system is 
in good condition, transfer position indicator light up for 2 seconds when ignition switch is turned to ON position, and 
then turned to OFF position. If an abnormality is detected in the system, transfer position indicator remains lighting.

Troubleshooting

1. 4WD control module

6. Junction block assembly

2. Combination meter

7. “METER” fuse

3. Differential lock indicator

8. Ignition switch

Step

Action

Yes

No

1

Transfer position indicator power supply check
1) Turn ignition switch to ON position.

Do other indicators come ON?

Go to Step 2.

Go to Step 3.

2

Check DTC
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ignition switch to ON position and check DTC.

Is there DTC(s) U1073, U1100, U1101 and/or U1121?

Go to applicable DTC 
diag. flow.

Substitute a known-
good combination meter 
and recheck. If transfer 
position indicator still 
remains off, substitute a 
known-good 4WD 
control module and 
recheck.

3

CAN communication circuit check
1) Check CAN communication circuit between combination 

meter and 4WD control module referring to “DTC U1073: 
Control Module Communication Bus Off: Motor-Shift 
Type (Transfer with Shift Actuator)”.

Is CAN communication circuit in good condition?

Go to Step 4.

Repair or replace.

4

“METER” fuse check
1) Turn ignition switch to OFF position.
2) Check for fuse blown to “METER” fuse in junction block 

assembly.

Is “METER” fuse in good condition?

Go to Step 5.

Replace “METER” fuse 
and check for short.

5

Combination meter power supply check
1) Remove combination meter referring to “Combination 

Meter Removal and Installation in Section 9C in related 
manual”.

2) Check proper connection to combination meter 

connector at “G28-13” and “G28-15” terminals.

3) If OK, then turn ignition switch to ON position and 

measure voltage between combination meter connector 
at “G28-13” terminal and vehicle body ground.

Is it 10 – 14 V?

Go to Step 6.

“PPL/RED” wire is open 
circuit.

6

Combination meter ground circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between combination meter 

connector at “G28-15” terminal and vehicle body ground.

Is resistance 1 

Ω

 or less?

Substitute a known-
good combination meter 
and recheck. If transfer 
position indicator still 
remains OFF, substitute 
a known-good 4WD 
control module and 
recheck.

“BLK” wire is open or 
high resistance circuit.