Suzuki Grand Vitara JB416 / JB420. Manual - part 429

10E-21 Keyless Start System: 

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 lamp 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 lamps in combination meter other than key 
indicator lamp 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.

Keyless Start System:  10E-22

Key Indicator Lamp Circuit Check (Key indicator lamp doesn’t light when ignition knob switch is 
pushed.)

S5JB0AA504014

Wiring Diagram

Description
When the ignition knob switch is pushed, the key indicator lamp 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.

Troubleshooting

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

I5JB0AA50014-03

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

3. Key indicator lamp

6. Key reminder switch

1. Keyless start control module

4. Steering lock unit

7. Ignition knob switch

2. Combination meter

5. Steering lock solenoid

8. Junction block

Step

Action

Yes

No

1

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

Do warning lamps in combination meter other than key 
indicator lamp 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.

10E-23 Keyless Start System: 

Keyless Start Control Module Power and Ground Circuit Check

S5JB0AA504015

Wiring Diagram

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.

• Between “G22-5” terminal of steering lock unit 

connector and “G44-34” terminal of keyless start 
control module connector

• Between “G28-10” terminal of combination meter 

connector and “G44-19” terminal of keyless start 
control module connector

• Between “G28-8” terminal of combination meter 

connector and “G44-18” terminal of keyless start 
control module connector

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.

Step

Action

Yes

No

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

2. Ignition switch

4. Main fuse

1. Keyless start control module

3. Circuit fuse

5. Junction block

BLK G44-9

G44-15

G44-10

G44-11

WHT/BLK

WHT

YEL

5V

12V

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

5

2

4

1

3

3

I5JB0AA50015-03

Keyless Start System:  10E-24

Troubleshooting

DTC No. 11: Communication Error with Steering Lock Unit

S5JB0AA504016

Wiring Diagram

Step

Action

Yes

No

1

Fuse check
1) Turn ignition switch to OFF position.
2) Check circuit fuse and main fuse for condition.

Are fuses in good condition?

Go to Step 2.

Replace fuse(s) and 
check for short.

2

Power supply circuit check
1) Disconnect connector from keyless start control module.
2) Check for proper connection to “G44-10”, “G44-11” and 

“G44-15” terminals of keyless start control module 
connector.

3) If OK, measure voltage between the following terminals.

• When ignition switch is at OFF position

Between “G44-10” terminal of keyless start control 
module connector and vehicle body ground: 10 – 14 V

• When ignition switch is at ACC position

Between “G44-11” terminal of keyless start control 
module connector and vehicle body ground: 10 – 14 V

• When ignition switch is at ON position

Between “G44-15” terminal of keyless start control 
module connector and vehicle body ground: 10 – 14 V

Is check result satisfactory?

Go to Step 3.

Repair power supply 
circuit.

3

Ground circuit check
1) Check for proper connection to “G44-9” terminal of 

keyless start control module connector.

2) If OK, measure resistance between “G44-9” terminal of 

keyless start control module connector and vehicle body 
ground.

Is resistance 1 

Ω

 or less?

Power and ground 
circuit is in good 
condition.

Repair ground circuit.

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

5V

G44-20

G44-29

G44-30

G22-3

G22-7

G22-8

5V

5V

ORN

BRN/YEL

BLK/YEL

5V

2

1

I5JB0AA50016-02

[A]: Keyless start control module connector “G44” (viewed from harness side)

2. Steering lock unit

1. Keyless start control module