Nissan Altima 2007-2012 Service Manual: Air conditioning cut control

System Diagram

System Description


System Description

INPUT/OUTPUT SIGNAL CHART

*1: This signal is sent to the ECM through CAN communication line.


*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.

When engine speed is excessively low.

• When refrigerant pressure is excessively low or high.

Component Parts Location

1. Intake valve timing control solenoid


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

1. Battery


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)


1. Exhaust manifold cover


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

1. EVAP service port


1. EVAP service port

2. Intake air duct

3. EVAP canister purge volume control solenoid 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 vehicle.)

12. Heated oxygen sensor 2 harness connector (This illustration is view from under vehicle.)

13. Engine oil pan

14. Heated oxygen sensor 3 (This illustration is view form under vehicle.)

15. Heated oxygen sensor 3 harness connector (This illustration is view from under vehicle.)

1. Thermostat housing


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 sensor (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.)

1. No.1 ignition coil


1. No.1 ignition coil

2. Cooling fan motor-1 harness connector

3. Cooling fan motor-2 harness connector

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

Component Description


Automatic speed control device


    Electric ignition system
    System Diagram System Description 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 en ...

    Automatic speed control device (ASCD)
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM through CAN communication line BASIC ASCD SYSTEM Refer to Owner's Manual for ASCD operating ins ...

    Other materials:

    Connecting procedure
    NOTE: The connecting procedure must be performed when the vehicle is stationary. If the vehicle starts moving during the procedure, the procedure will be cancelled. To connect a phone to the Bluetooth® Hands- Free Phone System: 1. Press the SETTING button. 2. Use the TUNE/FOLDER knob to s ...

    Power supply and ground circuit for front air control
    Description COMPONENT DESCRIPTION FRONT AIR CONTROL The front air control has a built-in microcomputer which processes information sent from various sensors needed for air conditioner operation. The air mix door motors, mode door motor, intake door motor, blower motor and compressor are then c ...

    Drive belts
    Checking Drive Belts WARNING: Inspect the drive belt only when the engine is stopped. • Make sure that the stamp mark of drive belt auto-tensioner is within the usable range. NOTE: • Check the drive belt auto-tensioner indicator (notch) when the engine is cold. • When ...