Nissan Altima 2007-2012 Service Manual: Evaporative emission system

System Diagram

System Description

INPUT/OUTPUT SIGNAL CHART

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to the ECM via the CAN communication line.

SYSTEM DESCRIPTION

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.

The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank.

The vapor in the EVAP canister is purged by the air via the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases.

EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.

EVAPORATIVE EMISSION LINE DRAWING

1. Intake manifold collector

2. EVAP canister purge volume control solenoid valve

3. EVAP service port

A. From EVAP canister

1. EVAP canister system pressure sensor

2. EVAP canister vent control valve

3. EVAP canister

A. To previous figure

B. To/From B in this figure

C. Refer to previous figure

NOTE: Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.

Component Parts Location

1. Power valve actuator 1

2. Intake valve timing control solenoid valve (bank 1)

3. Power steering pressure sensor

4. Intake valve timing control solenoid valve (bank 2)

5. VIAS control solenoid valves 1 and 2

6. Fuel injector (bank 2)

7. Ignition coil (with power transistor) and spark plug (bank 2)

8. Crankshaft position sensor (POS)

9. Engine coolant temperature sensor

10. Camshaft position sensor (PHASE) (bank 2)

11. ECM

12. Refrigerant pressure sensor

13. Battery current sensor

14. PNP switch

15. Condenser-2

16. Mass air flow sensor (with intake air temperature sensor)

17. EVAP service port

18. Camshaft position sensor (PHASE) (bank 1)

19. Electric throttle control actuator

20. Power valve actuator 2

21. EVAP canister purge volume control solenoid valve

22. Ignition coil (with power transistor) and spark plug (bank 1)

23. Knock sensor

1. Mas air flow sensor (with intake air temperature sensor)

2. Air cleaner case

3. Engine coolant temperature sensor

4. EVAP canister purge volume control solenoid valve

5. Power valve actuator 1

6. VIAS control solenoid valve 1

7. VIAS control solenoid valve 2

8. Power valve actuator 2

9. Power steering pressure sensor

10. Tie rod (RH)

11. Power valve actuator 2

12. Camshaft position sensor (PHASE) (bank 1)

13. Camshaft position sensor (PHASE) (bank 2)

1. A/F sensor 1 (bank 1)

2. A/F sensor 1 (bank 2)

3. HO2S2 (bank 1) harness connector

4. HO2S2 (bank 2) harness connector (CVT models)

5. Front engine mount

6. HO2S2 (bank 2) harness connector (M/T models)

7. Crankshaft position sensor (POS) (M/T models)

8. Crankshaft position sensor (POS) (CVT models)

1. Electronic controlled engine mount control solenoid valve

2. EVAP control system pressure sensor

3. EVAP canister vent control valve

4. EVAP canister

5. Injector harness connector

6. Intake valve timing control solenoid valve (bank 1)

7. Intake valve timing control solenoid valve (bank 2)

1. Knock sensor (bank 2)

2. Knock sensor (bank 1)

3. PNP switch (CVT models)

4. PNP switch (M/T models)

5. Battery

6. IPDM E/R

7. ECM

8. Refrigerant pressure sensor (shown with front grill removed)

9. Accelerator pedal

1. ASCD brake switch

2. Stop lamp switch

3. Brake pedal

4. ASCD steering switch

5. ASCD clutch switch (M/T models)

6. Clutch pedal

Component Description

    Electronic controlled engine mount
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM via the CAN communication line. SYSTEM DESCRIPTION The ECM controls the engine mount operation c ...

    Intake valve timing control
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM via the CAN communication line SYSTEM DESCRIPTION This mechanism hydraulically controls cam p ...

    Other materials:

    Engine coolant
    Changing Engine Coolant WARNING: • To avoid being scalded, never change the coolant when the engine is hot. • Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn to release built-up pressure. Then turn the cap all the way. DRAINING ENGINE ...

    Seat belt buckle switch signal circuit
    Description Transmits a seat belt buckle switch signal to the combination meter. Component Function Check 1. CHECK COMBINATION METER INPUT SIGNAL Select “DATA MONITOR” for “METER/M&A” and check the “BUCKLE SW” monitor value. >> Inspection End. Diagnosis Procedure 1. ...

    Passenger side
    Description Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM transmit and receive the signal by power window serial link. The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and power window a ...