Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 526

10B-5 Body Electrical Control System: 

Connector Layout Diagram of BCM

S6JB0AA202002

BCM connectors (viewed from harness side)

[A]: Door lock 1-Action type

21. Front fog light switch (if equipped)

43. Dimmer and passing switch

[B]: Door lock 2-Action type

22. Navigation (if equipped)

44. Horn relay

1. BCM

23. POWER/NORMAL mode switch (if equipped)

45. Horn switch

2. Auto-ON headlight sensor (if equipped)

24. Headlight auto leveling control module (if 

equipped)

46. Horn

3. Rear wiper motor

25. Front fog light relay (if equipped)

47. Lighting switch

4. Rear wiper relay

26. Tail light relay

48. Ignition switch

5. Rear wiper and washer switch

27. Junction connector

49. Battery

6. Outside air temperature sensor

28. Door mirror heater relay (if equipped)

50. To turn signal light

7. Key reminder switch

29. Rear end door lock actuator

51. Body ground

8. Theft deterrent light

30. Data link connector (DLC)

52. Engine ground

9. Oil pressure switch

31. Headlight high beam relay

53. Right side door mirror heater (if 

equipped)

10. Generator

32. Headlight low beam relay

54. Left side door mirror heater (if 

equipped)

11. Information display

33. Door lock motor relay

55. Audio unit

12. Keyless entry receiver (if equipped)

34. Driver side door lock actuator

INT: Intermittent position

13. Driver side door switch

35. Passenger side door lock actuator

ON: Rear wiper ON position

14. Other than driver side door switch

36. Rear door lock actuator

LO: Low beam position

15. HVAC control module

37. Turn signal and hazard warning relay

HI: High beam position

16. Driver side seat belt switch

38. Hazard warning switch

A: Auto position (if equipped)

17. Brake fluid level switch

39. Interior light

C: Clearance position

18. Parking brake switch

40. Air bag control module

H: Head position

19. Door key cylinder switch (included in door lock 

actuator)

41. Rear window defogger relay

20. Manual door lock switch

42. Rear window defogger

7

8

9

10

11

12

13

14

15

6

5

4

3

2

1

G32

24

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

G30

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

27

28

29

30

31

32

33

34

35

36

37

38

39

40

G31

1

I5JB0AA20002-01

1. BCM

Body Electrical Control System:  10B-6

Component Location

BCM and Related System Component Location

S6JB0AA203001

1

4

8

10

7

9

6

7

2

24

21

22

5

3

4

1

[A]

[B]

[A]

[B]

26

27

19

18

29

23

15

14

17

20

16

13

12

11

25

28

30

I6JB0AA20004-02

[A]: Petrol engine model

10. Rear end door lock actuator (incorporated 

in door switch)

21. Headlight high beam relay

[B]: Diesel engine model

11. Keyless entry receiver (if equipped)

22. Headlight low beam relay

1. Generator

12. Parking brake switch

23. BCM

2. Brake fluid level switch

13. Seat belt buckle switch

24. Rear end window defogger, mirror heater, rear wiper and 

front fog light relays (included in integration relay)

10B-7 Body Electrical Control System: 

Diagnostic Information and Procedures

BCM Self-Diagnosis Function

S6JB0AA204001

• BCM monitors conditions of the system components and its circuit with ignition switch turned to ON position. When 

an abnormality in the system occurs, the area where that abnormality lies is stored in the memory of EEPROM in 
BCM.

• DTC can be checked in either one of following ways.

– DTC can be checked by SUZUKI scan tool (2) connected to DLC (1).
– DTC can be read from flashing pattern of theft deterrent light (3). In addition, when theft deterrent light is flashing 

for DTC outputting DTC is displayed on combinations meter (4) at the same time.

BCM input / output table

3. ECM

14. Theft deterrent light

25. Keyless start control module (if equipped)

4. Oil pressure switch

15. Rear end door window defogger switch

26. Auto-on headlight sensor (if equipped)

5. Outside air temperature sensor

16. POWER/NORMAL mode select switch (A/

T model)

27. Front fog light switch (if equipped)

6. Door lock actuator (incorporated in 

key cylinder switch)

17. Hazard warning switch

28. Turn signal and hazard warning relay

7. Door switch

18. Rear wiper switch

29.  Key reminder switch (included in ignition switch)

8. Interior light

19. Lighting switch

30. Tail light relay

9. Luggage room light

20. Manual door lock switch

3

1

2

4

I5JB0AA20004-01

Control

Input

Output

Power door lock system

• Key cylinder switch
• Manual door lock switch

• Driver side door lock actuator
• Other than driver side door lock 

actuator

Keyless entry system

• Key reminder switch
• Keyless entry receiver
• Driver side door switch

• Driver side door lock actuator
• Other than driver side door lock 

actuator

• Turn signal and hazard warning relay
• Interior light

Keyless start system
(Door lock function)

• Keyless start control module

• Driver side door lock actuator
• Other than driver side door lock 

actuator

• Turn signal and hazard warning relay
• Interior light

Rear wiper 

• Rear wiper INT switch
• Rear wiper LO switch

• Rear wiper relay

Body Electrical Control System:  10B-8

Combination meter

• Lighting switch
• Brake fluid level switch
• Seat belt reminder light signal
• Generator
• Oil presser switch
• Parking brake switch
• Power/Normal mode select switch (A/T 

model)

• Dimmer switch (high beam)
• Door switch
• BCM DTC signal

• Combination meter

Interior light

• Each door switch
• Key reminder switch

• Interior light
• Luggage room light

Warning buzzer

• Key reminder switch
• Tail light switch
• Driver side door switch
• ECM (vehicle speed signal)
• TCM (reverse signal) (if equipped)
• 4WD control module (if equipped)
• Keyless start control module (if equipped)

• Warning buzzer (located in BCM)

DRL system

• Lighting switch
• ECM (engine ON, OFF signal)
• Generator

• Headlight low beam relay

Auto-on headlight system

• Lighting switch
• Parking brake switch
• Auto-on headlight sensor

• Tail light relay
• Headlight low beam relay

Front fog light

• Lighting switch
• Front fog light switch

• Front fog light relay

Rear end door window 
defogger and door mirror 
heater

• Rear end door window defogger switch 

(included in HVAC control module)

• Generator
• ECM (engine ON, OFF signal)

• Rear end door defogger window 

relay

• Mirror heater relay (if equipped)

Tail light

• Lighting switch

• Tail light relay

Door lock canceller

• SDM (air bag deployment signal)

• Driver side door lock actuator
• Other than driver side door lock 

actuator

Theft deterrent light

• Key reminder switch

• Theft deterrent light (located in HVAC 

control module)

Control

Input

Output