Nissan Altima L32. Manual - part 237

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-69

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

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Component Parts Location

INFOID:0000000004349161

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

EC-70

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

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

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AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC-71

< FUNCTION DIAGNOSIS >

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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

EC-72

< FUNCTION DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

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

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