Suzuki Grand Vitara JB416 / JB420. Manual - part 16

1A-13 Engine General Information and Diagnosis: 

Electronic Control System Description

S5JB0A1101007

The electronic control system consists of 1) various sensors which detect the state of engine and driving conditions, 2) 
ECM which controls various devices according to the signals from the sensors and 3) various controlled devices.
Functionally, it is divided into the following sub systems:
• Fuel injection control system
• Ignition control system
• Intake manifold tuning valve control system (for J20 engine)
• Electric Throttle Body Control System
• Fuel pump control system
• Radiator cooling fan control system
• Evaporative emission control system (if equipped)
• EGR system
• A/F sensor heater control system (if equipped)
• Oxygen sensor heater control system (if equipped)
• A/C control system (if equipped with A/C)
• Camshaft position control system (for M16 engine)
• Immobilizer control system (if equipped)
• Generator control system (for J20 engine)
• Controller (computer) communication system
Especially, ECM (Engine Control Module), BCM (Body electrical Control Module), combination meter, TCM 
(Transmission Control Module (For A/T model)), ABS hydraulic unit / control module assembly, 4WD control module 
(for J20 engine) and keyless start control module (if equipped) intercommunicate by means of CAN (Controller Area 
Network) communication.
Refer to “Engine and Emission Control System Flow Diagram” and “ECM Input / Output Circuit Diagram”.

AFS-

AFRV

AFRG

AFH+

AFH-

AFS+

5V

5V

12V

1

1

3

7

8

2

8

9

10

5

11

12

13

14

15

4

I5JB0A110010-02

10. Electrode 13. Lean 

11. A/F signal processing circuit

14. Rich 

12. CPU 15. 0.4 

V

Engine General Information and Diagnosis:  1A-14

Engine and Emission Control Input / Output Table

S5JB0A1101008

INPUT

OUTPUT

ELECTRIC CONTROL DEVICE

FUEL LEVEL SENSOR

For detecting fuel level

BAROMETRIC PRESSURE SENSOR

STOP LAMP SWITCH

START SWITCH

IGNITION SWITCH

A/C REFRIGERANT PRESSURE SENSOR (if equipped with A/C)

BLOWER SWITCH

A/C SWITCH (if equipped with A/C)

A/C EVAP OUTLET AIR TEMP. SENSOR (if equipped with A/C)

WHEEL SPEED SENSOR

A/F SENSOR

HEATED OXYGEN SENSOR-2

IAT SENSOR OF MAF AND IAT SENSOR   

MAF SENSOR OF MAF AND IAT SENSOR 

ECT SENSOR

POWER STEERING PRESSURE SWITCH

TP SENSOR

THROTTLE ACTUATOR 

FUEL PUMP RELA

Y

FUEL INJECT

IMT VACUUM SOLENOID VALVE

(for J20 engine) 

GENERATOR CONTROL

THROTTLE  ACTUATOR CONTROL RELAY 

OR

A/F SENSOR HEATER & HO2S HEATER

IGNITION COIL 

WITH IGNITER

EGR V

A

LV

E

EV

AP CANISTER PURGE 

V

A

LV

E

A/C COMPRESSOR RELA

Y (if equipped with A/C)

RADIA

T

OR F

AN RELA

Y

MIL

MAIN RELA

Y

OIL CONTR

OL 

V

A

LVE (for M16 engine)

SIGNAL FR

OM SENSOR, SWITCH AND CONTR

OL MODULE

ABS HYDRAULIC UNIT/CONTROL MODULE ASSEMBLY

KNOCK SENSOR

MAP SENSOR

CMP SENSOR

CKP SENSOR

IMMOBILIZER CONTROL MODULE (in ECM) (if equipped)

ELECTRIC LOAD (headlight, rear defogger)

GENERATOR

SHIFT RANGE SWITCH (except "P" or "N" range) (for A/T model)

ACCELERATOR PEDAL POSITION (APP) SENSOR

I5JB0A110014-06

1A-15 Engine General Information and Diagnosis: 

Schematic and Routing Diagram

Engine and Emission Control System Diagram

S5JB0A1102001

48

37

25

42

35

33

34

24

43

18

26

10

9

7

8

14

13

23 

11

15

12

2

6

1

3

30

29

38

16

17

36

31

22

21

40

27

41

32

4

28

44

5

45

20

19

46

47

39

49

I5JB0A110015-04

Engine General Information and Diagnosis:  1A-16

1. Air cleaner

18. Radiator cooling fan motor

35. Immobilizer coil antenna (if equipped)

2. EVAP canister purge valve

19. Combination meter

36. Main relay

3. MAF and IAT sensor

20. BCM

37. Wheel speed sensor (VSS)

4. TP sensor

21. Ignition switch

38. Oil control valve (for M16 engine)

5. IMT valve (for J20 engine)

22. Starter magnetic switch

39. TCM (for A/T or model)

6. MAP sensor

23. Heated oxygen sensor (HO2S)-2

40. Starting motor control relay

7. EGR valve

24. DLC

41. A/C refrigerant pressure sensor (if equipped with A/C)

8. EVAP canister

25. Electric load

42. Accelerator pedal position (APP) sensor

9. Tank pressure control valve (built-in fuel pump)

26. Fuel level sensor

43. Throttle actuator control relay

10. Fuel pump

27. Stop lamp

44. Throttle actuator

11. Ignition coil assembly

28. Stop lamp switch

45. IMT vacuum solenoid valve (for J20 engine)

12. Fuel injector

29. ECM

46. Keyless start control module (if equipped)

13. A/F sensor

30. Barometric pressure sensor

47. 4WD control module (for J20 engine)

14. Knock sensor

31. Battery

48. ABS hydraulic unit / control module assembly

15. ECT sensor

32. A/C compressor relay (if equipped 

with A/C)

49. For J20 engine

16. CMP sensor

33. Power steering pump pressure 

switch

17. CKP sensor

34. Generator