Suzuki Grand Vitara JB416 / JB420. Manual - part 430

10E-25 Keyless Start System: 

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

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 “G44-20”, “G44-29” and 

“G44-30” terminals of keyless start control module 
connector.

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

circuit.
• Between “G22-3” terminal of steering lock unit 

connector and “G44-20” terminal of keyless start 
control module connector

• Between “G22-7” terminal of steering lock unit 

connector and “G44-29” terminal of keyless start 
control module connector

• Between “G22-8” terminal of steering lock unit 

connector and vehicle body ground

Is each circuit in good condition?

Go to Step 3.

Repair circuit.

3

Steering lock unit power supply voltage check
1) Connect connector to keyless start control module.
2) Measure voltage between “G22-3” 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.

Keyless Start System:  10E-26

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

S5JB0AA504017

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
DTC No. 13 is also set is such case where the keyless start control module which was used in another 
vehicle is installed, the remote controller ID code is registered in it but the ignition key transponder 
code is not registered in ECM. Therefore, when DTC No. 13 is detected, register the ignition key 
transponder code in ECM before replacing the steering lock unit.

 

DTC No. 21 / No. 22: Internal Error of Keyless Start Control Module (EEPROM reading error) / 
(EEPROM writing error)

S5JB0AA504018

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.

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

10E-27 Keyless Start System: 

DTC No. 31: Lost Communication with BCM

S5JB0AA504019

Wiring Diagram

WHT

RED

WHT

RED

G44-18

G44-19

G44

[A]

[B]

[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 E23-4

E23-19

WHT

RED E03-12

E03-10

E03-6

E03-8

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

2 1

E23

3

4

18

19

5

6

7

10

11

17

20

47 46

49

50

51

21

22

52

16

25

9

24

14

29

55

57

5453

59

60

58

26

27

28

15
30

56

48

32 31

34

35

36

37

40

42

3938

44

45

43

41

33

12

13

23

8

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

I5JB0AA50017-03

[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 (if equipped)

[D]: DLC (viewed from harness side)

4. Keyless start control module

[E]: ABS hydraulic unit / control module connector (viewed from harness side)

5. DLC

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

6. ECM

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

7. ABS hydraulic unit / control module (if equipped)

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

8. Combination meter
9. Junction connector

Keyless Start System:  10E-28

DTC Detecting condition and trouble area

DTC Confirmation Procedure

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

Troubleshooting

DTC detecting condition

Trouble area

Keyless start control module cannot receive data 
sent by CAN from BCM

• CAN communication circuit
• Keyless start control module
• BCM

Step

Action

Yes

No

1

Was “Keyless Start System Check” performed?

Go to Step 2.

Go to “Keyless Start 
System Check”.

2

DTC Check

Is DTC No. 33 detected?

Go to “DTC No. 33: 
Control Module 
Communication Bus 
Off”.

Go to Step 3.

3

DTC Check
1) Check BCM for DTC referring to “DTC Check in Section 

10B”

Is DTC U1073, DTC U1100 or DTC U1101 detected?

Go to applicable DTC 
diag flow.

Go to Step 4.

4

BCM power and ground circuit check
1) Check BCM power and ground circuit for condition 

referring to “BCM Power Circuit and Ground Circuit 
Check in Section 10B”.

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 keyless start 

control module and BCM for open, short and high 
resistance.

Is CAN communication circuit in good condition?

Go to Step 6.

Repair circuit.

6

DTC check
1) Connect connectors of all control modules 

communicating by means of CAN.

2) Check DTCs for ECM and TCM.

Is DTC P1678 detected by ECM and DTC P1778 by TCM?

Substitute a known-
good BCM and recheck.

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