Nissan Altima L32. Instruction — part 228

ENGINE CONTROL SYSTEM

EC-33

< FUNCTION DIAGNOSIS >

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C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

FUNCTION DIAGNOSIS

ENGINE CONTROL SYSTEM

System Diagram

INFOID:0000000004349143

JMBIA0121GB

EC-34

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ENGINE CONTROL SYSTEM

System Description

INFOID:0000000004349144

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

Component Parts Location

INFOID:0000000004349145

1.

Intake valve timing control solenoid
valve

2.

Ignition coil (with power transistor)
and spark plug

3.

Knock sensor,
Crankshaft position sensor (POS)

4.

Air fuel ratio (A/F) sensor 1

5.

Camshaft position sensor (PHASE)

6.

Engine coolant temperature sensor

7.

Park/neutral position (PNP) switch

8.

ECM

9.

Refrigerant pressure sensor

10. Battery current sensor

11. IPDM E/R

12. Mass air flow sensor (with intake

temperature sensor)

13. Tumble control valve actuator

14. EVAP service port

15. Electric throttle control actuator

(with built in throttle position sensor
and throttle control motor)

16. EVAP canister purge volume control

solenoid valve

17. Fuel injector

18. Power steering pressure sensor

ALBIA0046ZZ

ENGINE CONTROL SYSTEM

EC-35

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Battery

2.

Fuel pump fuse (15A)

3.

IPDM E/R

4.

Brake master cylinder

5.

Engine ground

6.

Air cleaner assembly

7.

Mass air flow sensor (with intake air
temperature sensor)

8.

Radiator hose (upper)

9.

Engine coolant temperature sensor

10. Intake air duct

11. Camshaft position sensor (PHASE)

12. Tie rod (RH)

13. Power steering pressure sensor

14. Knock sensor

15. Engine oil cooler

16. Crankshaft position sensor (POS)

17. Drive shaft (RH)

: Vehicle front

ALBIA0091ZZ

EC-36

< FUNCTION DIAGNOSIS >

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ENGINE CONTROL SYSTEM

JMBIA0118GB

1.

Exhaust manifold cover

2.

Air fuel ratio (A/F) sensor 1

3.

Heated oxygen sensor 2
(This illustration is a view from under
vehicle.)

4.

Engine oil pan

: Vehicle front

ALBIA0068ZZ