Infiniti G37 Coupe. Manual — part 461

ENGINE CONTROL SYSTEM

EC-25

< FUNCTION DIAGNOSIS >

[VQ37VHR]

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System Description

INFOID:0000000001733928

ECM performs various controls such as fuel injection control and ignition timing control.

Component Parts Location

INFOID:0000000001733929

25. VVEL control shaft position sensor

26. Intake valve timing control solenoid

valve

27. Camshaft position sensor (PHASE)

28. Fuel damper

29. Engine coolant temperature sensor

30. Knock sensor

31. Crankshaft position sensor (POS)

32. Muffler

33. Cooling fan control module

34. Cooling fan

35. PNP switch

36. Air cleaner

37. Mass air flow sensor (with intake air

temperature sensor)

38. Electric throttle control actuator

39. Throttle position sensor

40. Manifold absolute pressure (MAP)

sensor

41. Brake booster pressure sensor

42. MIL

43. Ignition switch

44. Accelerator pedal position sensor

45. Power steering pressure sensor

46. Refrigerant pressure sensor

1.

Battery current sensor

2.

IPDM E/R

3.

VVEL control module

4.

Cooling fan relay

5.

VVEL actuator motor relay

6.

Mass air flow sensor (with intake air
temperature sensor) (bank 1)

JMBIA0837ZZ

EC-26

< FUNCTION DIAGNOSIS >

[VQ37VHR]

ENGINE CONTROL SYSTEM

7.

Refrigerant pressure sensor

8.

Camshaft position sensor (PHASE)
(bank 1)

9.

Cooling fan motor-2

10. Intake valve timing control solenoid

valve (bank 1)

11.

Cooling fan control module

12. Cooling fan motor-1

13. Intake valve timing control solenoid

valve (bank 2)

14. Camshaft position sensor (PHASE)

(bank 2)

15. Mass air flow sensor (with intake air

temperature sensor) (bank 2)

16. ICC brake hold relay (ICC models)

17. Brake booster pressure sensor

18. Ignition coil (with power transistor)

and spark plug (bank 2)

19. Electric throttle control actuator

(bank 2)

20. A/F sensor 1 (bank 2)

21. Fuel injector (bank 2)

22. VVEL control shaft position sensor

(bank 2)

23. VVEL actuator motor (bank 2)

24. Manifold absolute pressure (MAP)

sensor

25. Engine coolant temperature sensor

26. Knock sensor

27. Fuel injector (bank 1)

28. VVEL actuator motor (bank 1)

29. EVAP canister purge volume control

solenoid valve

30. VVEL control shaft position sensor

(bank 1)

31. Ignition coil (with power transistor)

and spark plug (bank 1)

32. EVAP service port

33. A/F sensor 1 (bank 1)

34. Crankshaft position sensor (POS)

35. Electric throttle control actuator

(bank 1)

1.

Mass air flow sensor (with intake air
temperature sensor) (bank 1)

2.

Mass air flow sensor (with intake air
temperature sensor) (bank 2)

1.

Electric throttle control actuator
(bank 1)

2.

Electric throttle control actuator
(bank 2)

JMBIA0838ZZ

JMBIA0839ZZ

JMBIA0840ZZ

ENGINE CONTROL SYSTEM

EC-27

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[VQ37VHR]

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: Vehicle front

1.

Cooling fan motor-2

2.

Cooling fan control module

3.

Cooling fan motor-1

4.

Cooling fan relay

PBIB1907E

: Vehicle front

1.

A/F sensor 1 (bank 1)

2.

A/F sensor 1 (bank 2)

: Vehicle front

1.

A/F sensor 1 (bank 1) harness con-
nector

2.

A/F sensor 1 (bank 2) harness con-
nector

JMBIA0007ZZ

JMBIA0841ZZ

EC-28

< FUNCTION DIAGNOSIS >

[VQ37VHR]

ENGINE CONTROL SYSTEM

: Vehicle front

1.

Heated oxygen sensor 2 (bank 2)

2.

Heated oxygen sensor 2 (bank 2)
harness connector

3.

Heated oxygen sensor 2 (bank 1)

4.

Heated oxygen sensor 2 (bank 1)
harness connector

1.

Manifold absolute pressure (MAP)
sensor

2.

Brake booster pressure sensor

3.

VVEL actuator motor relay

4.

VVEL control module

1.

VVEL control shaft position sensor
(bank 1)

2.

VVEL actuator motor (bank 1)

3.

VVEL actuator motor (bank 2)

4.

VVEL control shaft position sensor
(bank 2)

JMBIA0018ZZ

JMBIA0850ZZ

JMBIA0851ZZ