Suzuki Grand Vitara JB627. Service manual - part 435

10E-25 Keyless Start System: 

Keyless Start Control Module Power and Ground Circuit Check

S6JB0BA504016

Wiring Diagram

Troubleshooting

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

3

6

7

8

9

I7JB01A50003-01

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

4. Main fuse

8. IG ON signal circuit

1. Keyless start control module

5. Junction block

9. Ground circuit

2. Ignition switch

6. Power source circuit

3. Circuit fuse

7. ACC signal circuit

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 “Power source”, “ACC 

signal” and “IG ON signal” terminal of keyless start 
control module connector.

3) If OK, measure voltage between following terminals.

• “Power source” terminal of keyless start control 

module connector and vehicle body ground with 
ignition switch is at OFF position

• “ACC signal” terminal of keyless start control module 

connector and vehicle body ground with ignition 
switch is at ACC position

• “IG ON signal” terminal of keyless start control module 

connector and vehicle body ground with ignition 
switch is at ON position

Is each terminal voltage is 10 – 14 V?

Go to Step 3.

Repair defective power 
supply circuit.

3

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

keyless start control module connector.

2) If OK, measure resistance between “Ground” 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.

Keyless Start System:  10E-26

DTC No. 11: Communication Error with Steering Lock Unit

S6JB0BA504017

Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC referring to “DTC Clearance”.
2) Turn ignition knob switch pushing ignition knob switch.
3) Check DTC referring to “DTC Check”.

Troubleshooting

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

3

4

5

I7JB01A50004-01

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

3. Steering lock unit power supply circuit

1. Keyless start control module

4. Steering lock unit signal circuit

2. Steering lock unit

5. Steering lock unit ground circuit

DTC detecting condition

Trouble area

No communication is available between keyless start 
control module and steering lock unit.

• Steering lock unit and its circuit
• Keyless start control module

Step

Action

Yes

No

1

Was “Keyless Start System Check” performed?

Go to Step 2.

Go to “Keyless Start 
System Check”.

2

Steering lock unit circuit check
1) Disconnect connector from keyless start control module.
2) Check for proper connection to “Steering lock unit power 

supply”, “Steering lock unit signal” and “Steering lock unit 
ground” terminals of keyless start control module 
connector.

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

following circuits.
• Steering lock unit power supply circuit
• Steering lock unit signal circuit
• Steering lock unit ground circuit

Is each circuit in good condition?

Go to Step 3.

Repair circuit.

10E-27 Keyless Start System: 

DTC No. 13 / No. 14: Release Signal Error from Steering Lock Unit / Steering Lock Unit Malfunction

S6JB0BA504018

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC referring to “DTC Clearance”.
2) Turn ignition knob switch pushing ignition knob switch.
3) Check DTC referring to “DTC Check”.

Troubleshooting
Replace steering lock unit and recheck.

NOTE
Be sure to register the following code when a used keyless start control module is installed. Otherwise 
DTC No.13 is detected by keyless start control module though steering lock unit is normal.
• With immobilizer control system, ignition key transponder code is not registered in ECM.
• Without immobilizer control system, steering lock unit ID code is not registered in keyless start 

control module.

 

DTC No. 21 / No. 22: Internal Error of Keyless Start Control Module (EEPROM Reading Error) / 
(EEPROM Writing Error)

S6JB0BA504019

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) Clear DTC referring to “DTC Clearance”.
2) Turn ignition knob switch pushing ignition knob switch.
3) Push request switch of each door.
4) Check DTC referring to “DTC Check”.

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

3

Steering lock unit power supply voltage check
1) Connect connector to keyless start control module.
2) Measure voltage between “Steering lock unit power 

supply” terminal of steering lock unit connector and 
vehicle body ground.

Is voltage 4 – 6 V?

Replace steering lock 
unit.

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

Step

Action

Yes

No

DTC detecting condition

Trouble area

DTC No. 13:
Although lock release signal is output to steering lock unit, no lock 
release signal is inputted from steering lock unit.
(wire harness is normal)
DTC No. 14:
Although lock release signal is output to steering lock unit, 
steering lock is not released due to temperature rise of steering 
lock unit solenoid and no lock release signal is inputted.
(wire harness is normal)

• Steering lock unit

DTC detecting condition

Trouble area

DTC No. 21:
Data cannot be read from memory in keyless start control module.
DTC No. 22:
Data cannot be written into memory in keyless start control 
module.

• Keyless start control module

Keyless Start System:  10E-28

DTC No. 31: Lost Communication with BCM

S6JB0BA504020

Wiring Diagram

WHT

RED

WHT

RED

G44-18

G44-19

G44

[A]

[C]

[H]

[G]

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

G28-8

G28-10

WHT/BLU

WHT/BLU

WHT/RED

WHT/RED

E23-9
E23-17

WHT

RED

E53-13

E53-42

E53-44

E53-46

WHT

RED

E92-17

E92-7

WHT

RED

E91-22
E91-23

WHT

RED

RED

G31-1
G31-3

G31-4

6

5

16 15 14 13 12 11

4 3

24 23

21

22

10 9

8

7

2

1

19

20

18 17

E92

1

2

3

4

5

6

7

8

9

10

11

17

1615141312

2221201918

G28

[F]

G31

E91

1

2

3

4

7

8

9

10

11

14

15

16
36

34

35

24 23

21

22

28 27

25

26

37

39 38

40

18 17

13 12

19

20

1

2

3

10

11

12

16

17

18

15 14 13

19

20

21

25

26

5

6

[E]

[D]

E03

15
16
17
18
19
20
21
22
23
24
25

2
3
4
5
6
7
8
9

10
11
12

1

13

14

26

8 7 6 5 4 3 2 1

9

10

11

12

13

14

15

16

G31-2

WHT

1

2

3

4

9

5

6

7

8

11

WHT

RED

G45-9
G45-10

10

[L]

[K]

E03-12

E03-10

E03-6

E03-8

[I]

E53

16

1

15

2

3

4

5

6

7

8

9

10

11

12

13

14

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

[J]

G45

10 9

3 2 1

[B]

E23

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

33

34

35

36

37

38

39

40

32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

I6JB0BA50002-01

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

1. BCM

[B]: ECM connector (viewed from harness side)

2. 4WD control module (if equipped)

[C]: TCM connector (viewed from harness side)

3. TCM (A/T model)

[D]: DLC (viewed from terminal side)

4. Keyless start control module

[E]: ABS control module connector (viewed from terminal side)

5. DLC

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

6. ECM

[G]: 4WD control module connector (viewed from harness side)

7. ABS control module

[H]: BCM connector (viewed from harness side)

8. Combination meter

[I]: ESP

® control module connector (viewed from terminal side)

9. Junction connector

[J]: Steering angle sensor connector (viewed from harness side)

10. ESP

® control module

[K]: ESP

® model

11. Steering angle sensor (if equipped)

[L]: Other than ESP

® model