Nissan Altima L32. Instruction — part 229

ENGINE CONTROL SYSTEM

EC-37

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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EC

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1.

EVAP service port

2.

Intake air duct

3.

EVAP canister purge volume control so-
lenoid valve

4.

Intake manifold collector

5.

Park/neutral position (PNP) switch (CVT)
(This illustration is view with air cleaner
assembly removed.)

6.

Park/neutral position (PNP) switch (M/T)
(This illustration is view with air cleaner
assembly removed.)

7.

Intake valve timing control
solenoid valve
(This illustration is view with
engine removed.)

8.

Exhaust manifold cover

9.

Air fuel ratio (A/F) sensor 1

10. Air fuel ratio (A/F) sensor 1

harness connector

11. Heated oxygen sensor 2

(This illustration is view from under vehi-
cle.)

12. Heated oxygen sensor 2 harness con-

nector
(This illustration is view from under vehi-
cle.)

13. Engine oil pan

14. Heated oxygen sensor 3

(This illustration is view form under vehi-
cle.)

15. Heated oxygen sensor 3 harness con-

nector
(This illustration is view from under vehi-
cle.)

: Vehicle front

ALBIA0092ZZ

EC-38

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

ENGINE CONTROL SYSTEM

1.

Thermostat housing

2.

Tumble control valve actuator

3.

Throttle valve
(This illustration is view with intake
air duct removed.)

4.

Electric throttle control actuator

5.

Fuel injector harness connector

6.

Condenser-2

7.

Radiator hose (upper)

8.

Battery

9.

ECM

10. Fuel level sensor unit and fuel pump

harness connector
(This illustration is view with rear
seat cushion and inspection hole
cover removed.)

11. Fuel level sensor unit and fuel pump

assembly

12. Fuel pressure regulator

13. Fuel tank temperature sensor

14. EVAP control system pressure sen-

sor (This illustration is view with rear
suspension member removed.)

15. EVAP canister vent control valve

(This illustration is view with rear
suspension member removed.)

16. EVAP canister

(This illustration is view with rear
suspension member removed.)
: Vehicle front

ALBIA0093ZZ

ENGINE CONTROL SYSTEM

EC-39

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

C

D

E

F

G

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EC

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Component Description

INFOID:0000000004349146

1.

No.1 ignition coil

2.

Cooling fan motor-1 harness con-
nector

3.

Cooling fan motor-2 harness con-
nector

4.

Refrigerant pressure sensor

5.

Accelerator pedal position sensor

6.

ASCD brake switch

7.

Stop lamp switch

8.

Brake pedal

9.

ASCD clutch switch

10. Clutch pedal

11. ASCD steering switch

12. CANSEC switch

13. RESUME/ACCELERATE switch

14. SET/COAST switch

15. MAIN switch

: Vehicle front

ALBIA0089ZZ

Component

Reference

A/F sensor 1

EC-199, "Description"

A/F sensor 1 heater

EC-155, "Description"

Accelerator pedal position sensor

EC-427, "Description"

ASCD brake switch

EC-394, "Description"

EC-40

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

ENGINE CONTROL SYSTEM

ASCD steering switch

EC-391, "Description"

Battery current sensor

EC-379, "Description"

Camshaft position sensor (PHASE)

EC-282, "Description"

Crankshaft position sensor (POS)

EC-278, "Description"

Cooling fan motor

EC-77, "System Description"

Electric throttle control actuator

EC-425, "Description"

Engine coolant temperature sensor

EC-184, "Description"

EVAP canister purge volume control solenoid valve

EC-301, "Description"

EVAP canister vent control valve

EC-308, "Description"

EVAP control system pressure sensor

EC-316, "Description"

Fuel injector

EC-463, "Description"

Fuel level sensor

EC-343, "Description"

Fuel pump

EC-466, "Description"

Fuel tank temperature sensor

EC-262, "Description"

Heated oxygen sensor 2

EC-214, "Description"

Heated oxygen sensor 2 heater

EC-158, "Description"

Heated oxygen sensor 3

EC-234, "Description"

Heated oxygen sensor 3 heater

EC-161, "Description"

Ignition signal

EC-470, "Description"

Intake air temperature sensor

EC-181, "Description"

Intake valve timing control solenoid valve

EC-97, "System Description"

Knock sensor

EC-276, "Description"

Mass air flow sensor

EC-168, "Description"

Park/neutral position switch

EC-365, "Description"

PCV valve

EC-481, "Description"

Power steering pressure sensor

EC-354, "Description"

Refrigerant pressure sensor

EC-482, "Description"

Stop lamp switch

EC-406, "Description"

Throttle control motor

EC-423, "Description"

Throttle control motor relay

EC-417, "Description"

Throttle position sensor

EC-189, "Description"

Tumble control valve

EC-409, "Description"

Tumble control valve position sensor

EC-414, "Description"

Component

Reference