Nissan Altima L32. Manual - part 234

ELECTRIC IGNITION SYSTEM

EC-57

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Component Description

INFOID:0000000004349154

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

Accelerator pedal position sensor

EC-427, "Description"

Camshaft position sensor (PHASE)

EC-282, "Description"

Crankshaft position sensor (POS)

EC-278, "Description"

Engine coolant temperature sensor

EC-184, "Description"

EC-58

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ELECTRIC IGNITION SYSTEM

Ignition signal

EC-470, "Description"

Knock sensor

EC-276, "Description"

Mass air flow sensor

EC-168, "Description"

Park/neutral position switch

EC-365, "Description"

Throttle position sensor

EC-189, "Description"

Vehicle speed sensor

EC-348, "Description"

Component

Reference

AIR CONDITIONING CUT CONTROL

EC-59

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AIR CONDITIONING CUT CONTROL

System Diagram

INFOID:0000000004349155

System Description

INFOID:0000000004349156

INPUT/OUTPUT SIGNAL CHART

*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

This system improves engine operation when the air conditioner is used.

Under the following conditions, the air conditioner is turned off.

• When the accelerator pedal is fully depressed.

• When cranking the engine.

• At high engine speeds.

• When the engine coolant temperature becomes excessively high.

• When operating power steering during low engine speed or low vehicle speed.

JMBIA0175GB

Sensor

Input Signal to ECM

ECM function

Actuator

Air conditioner switch*

1

Air conditioner ON signal

Air conditioner 
cut control

IPDM E/R
↓
Air conditioner relay
↓
Compressor

Accelerator pedal position sensor

Accelerator pedal position

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

2

Engine coolant temperature sensor

Engine coolant temperature

Battery

Battery voltage*

2

Refrigerant pressure sensor

Refrigerant pressure

Power steering pressure sensor

Power steering operation

Combination meter

Vehicle speed*

1

BCM

Air conditioner ON signal*

1

EC-60

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AIR CONDITIONING CUT CONTROL

• When engine speed is excessively low.

• When refrigerant pressure is excessively low or high.

Component Parts Location

INFOID:0000000004349157

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