Suzuki Grand Vitara JB627. Service manual - part 434

10E-21 Keyless Start System: 

No DTC Detection After Performing DTC Check

S6JB0BA504014

Wiring Diagram

BLK

G44-9

G44-15

G44-14

G44-16

G44-20
G44-29
G44-30

G44-10

G44-34

G44-11

WHT/BLK

WHT

WHT

RED/BLK

YEL

5V

5V

5V

5V

5V

12V

12V

WHT

RED

WHT

RED

G44-18

G44-19

BLU/RED

BRN/RED

BLK/YEL

BRN/YEL

ORN

G22-3

G22-4

G22-5

G22-2

G22-1

G22-6

G22-7
G22-8

WHT

WHT

G44

[A]

[B]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

WHT

G28-8

G28-10

G28-14

7

10

1

2

4

9

5

3

6

8

I6JB01A50005-01

[A]: Keyless start control module connector (viewed from harness side)

3. Steering lock solenoid

7. Combination meter

[B]: To each control module

4. Ignition knob switch

8. Key indicator light

1. Keyless start control module

5. Key reminder switch

9. Junction box

2. Steering lock unit

6. Driver side door request switch

10. Junction connector

Keyless Start System:  10E-22

Description
The keyless start control module detects DTC by using signals from the key reminder and driver side door request 
switches. The keyless start control module makes the key indicator light in the combination meter flash on and off by 
using CAN communication.

Troubleshooting

Step

Action

Yes

No

1

Combination meter power and ground circuit check
1) Turn ignition switch to ON position.

Do warning light in combination meter other than key 
indicator light light up?

Go to Step 2.

Check main fuse, circuit 
fuse, combination meter 
power and ground 
circuit.

2

Driver side door request switch and its circuit check
1) Check driver side door request switch and its circuit 

referring to “DTC No. 51 / No. 52 / No. 53: Driver Side / 
Passenger Side / Rear End Door Request Switch 
Failure”.

Is it in good condition?

Go to Step 3.

Repair or replace 
malfunction part.

3

Key reminder switch and its circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connector from ignition switch.
3) Check key reminder switch for operation referring to 

“Ignition Switch Inspection in Section 9C”.

4) If OK, check for open, short and high resistance in key 

reminder switch circuit.

Is it in good condition?

Go to Step 4.

Repair or replace 
malfunction part.

4

Keyless start control module power supply and ground 
circuit
1) Check keyless start control module power and ground 

circuit for condition referring to “Keyless Start Control 
Module Power and Ground Circuit Check”.

Is it in good condition?

Go to Step 5.

Repair circuit.

5

CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules 

communicating by means of CAN.

3) Check CAN communication circuit between control 

modules for open, short and high resistance.

Is each CAN communication circuit in good condition?

Substitute a known-
good keyless start 
control module and 
recheck.

Repair circuit.

10E-23 Keyless Start System: 

Key Indicator Light Circuit Check (Key Indicator Light Doesn’t Light when Ignition Knob Switch is 
Pushed)

S6JB0BA504015

Wiring Diagram

Description
When the ignition knob switch is pushed, the key indicator light lights up in blue if you carry the remote controller 
registered in the keyless start control module and it lights in red if you carry the remote controller which has not been 
registered in the keyless start control module or if you carry no remote controller.

BLK G44-9

G44-15

G44-14

G44-20
G44-29
G44-30

G44-10

G44-34

G44-11

WHT/BLK

WHT

WHT

YEL

5V

5V

5V

5V

5V

12V

WHT

RED

WHT

RED

G44-18

G44-19

BLU/RED

BRN/RED

BLK/YEL

BRN/YEL

ORN

G22-3

G22-4

G22-5

G22-2

G22-1

G22-6

G22-7
G22-8

WHT

WHT

G44

[A]

1

2

3

4

5

6

7

8

9

10

11

14

15

16
36

34 33 32

30 29

24 23

37

18

19

20

WHT

G28-8

G28-10

G28-14

8

1

2

3

5

7

6

4

9

I7JB01A50002-01

[A]: Keyless start control module connector (viewed from harness side)

4. Steering lock unit

8. Junction block

1. Keyless start control module

5. Steering lock solenoid

9. Ignition knob switch signal circuit

2. Combination meter

6. Key reminder switch

3. Key indicator light

7. Ignition knob switch

Keyless Start System:  10E-24

Troubleshooting

Step

Action

Yes

No

1

Combination meter power and ground circuit check
1) Turn ignition switch to ON position.

Do warning light in combination meter other than key 
indicator light light up?

Go to Step 2.

Check main fuse, circuit 
fuse, combination meter 
power and ground 
circuit.

2

Keyless start control module power and ground circuit 
check
1) Check keyless start control module power and ground 

circuit for condition referring to “Keyless Start Control 
Module Power and Ground Circuit Check”.

Is it in good condition?

Go to Step 3.

Repair circuit.

3

Steering lock unit ignition knob switch check
1) Check ignition knob switch of steering lock unit for 

operation referring to “Steering Lock Unit Inspection”.

Is it in good condition?

Go to Step 4.

Replace steering lock 
unit.

4

Wire harness check
1) Turn ignition switch to OFF position.
2) Disconnect connector from keyless start control module, 

steering lock unit and combination meter.

3) Check for open, short and high resistance in following 

circuits.
• Ignition knob switch signal circuit
• Keyless start control module and combination meter 

CAN communication circuit

Is it in good condition?

Go to Step 5.

Repair circuit.

5

Keyless start system operation check
1) With remote controller of which ID code is registered in 

keyless start control module carried with you, try to turn 
ignition knob switch.

Can it be turned to any position other than “LOCK” position?

Replace combination 
meter.

Substitute a known-
good keyless start 
control module and 
recheck.