Nissan Maxima Service and Repair Manual: Evaporative emission system

System Diagram

System Description

*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
1.  From EVAP canister
   : Vehicle front

1. EVAP canister vent control valve
2. EVAP canister system pressure sensor
3. EVAP canister
4. Rear suspension member
5. Drain filter
   : Front
   : Previous/next figure

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

Component Parts Location

1. Intake valve timing control solenoid valve (bank 1)
2. Electronic controlled engine mount control solenoid valve
3. Exhaust valve timing control magnet retarder (bank 2)
4. Intake valve timing control solenoid valve (bank 2)
5. Knock sensor (bank 1 and 2)
6. Fuel injector (bank 2)
7. Ignition coil (with power transistor) and spark plug (bank 2)
8. Exhaust valve timing control position sensor (bank 2)
9. Crankshaft position sensor (POS)
10. Engine coolant temperature sensor
11. Camshaft position sensor (PHASE) (bank 2)
12. Transmission range switch
13. Refrigerant pressure sensor
14. ECM
15. Battery current sensor
16. Condenser-2
17. EVAP canister purge volume control solenoid valve
18. Mass air flow sensor (with intake air temperature sensor)
19. Camshaft position sensor (PHASE) (bank 1)
20. EVAP service port
21. Power valve actuator 2
22. Electric throttle control actuator
23. Exhaust valve timing control position sensor (bank 1)
24. Ignition coil (with power transistor) and spark plug (bank 1)
25. Fuel injector (bank 1)
26. VIAS control solenoid valve 1 and 2
27. Power valve actuator 1
28. Exhaust valve timing control magnet retarder (bank 1)
29. Power steering pressure sensor

1. Mas air flow sensor (with intake air temperature sensor)
2. Air cleaner case
3. Engine coolant temperature sensor (view with engine cover removed)
4. EVAP canister purge volume control solenoid valve (view with engine cover removed)
5. Power valve actuator 1 (view with engine cover removed)
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. Camshaft position sensor (PHASE) (bank 1) (view with air cleaner case removed)
12. Exhaust valve timing control position sensor (bank 1)
13. Camshaft position sensor (PHASE) (bank 2) (view with air cleaner case removed)
14. Exhaust valve timing control position sensor (bank 2)
15. Engine oil temperature sensor
    : Vehicle front

1. A/F sensor 1 (bank 1) (view with engine removed)
2. A/F sensor 1 (bank 2)
3. HO2S2 (bank 1) harness connector (view with engine removed)
4. HO2S2 (bank 2) harness connector
5. Front engine mount
6. Crankshaft position sensor (POS)
   : Vehicle front

1. Electronic controlled engine mount control solenoid valve (view with engine cover removed)
2. EVAP control system pressure sensor (view with rear suspension member removed)
3. EVAP canister vent control valve
4. EVAP canister 5. Fuel injector harness connector (view with intake manifold collector removed)
5. Exhaust valve timing control magnet retarder (bank 1) (view with engine removed)
6. Intake valve timing control solenoid valve (bank 1)
7. Intake valve timing control solenoid valve (bank 2)
8. Exhaust valve timing control magnet retarder (bank 2)
   : Vehicle front

1. Knock sensor (bank 2) (view with intake manifold removed)
2. Knock sensor (bank 1)
3. Transmission range switch (view with CVT removed)
4. Battery
5. IPDM E/R
6. ECM
7. Refrigerant pressure sensor (view with front grille removed)
8. Accelerator pedal position sensor
   : Vehicle front

1. Stop lamp switch
2. ASCD brake switch
3. ASCD steering switch

Component Description

Component Reference

• A/F sensor 1 EC-218, "Description"
• Accelerator pedal position sensor EC-467, "Description"
• Camshaft position sensor (PHASE) EC-300, "Description"
• Crankshaft position sensor (POS) EC-296, "Description"
• Engine coolant temperature sensor EC-201, "Description"
• EVAP canister purge volume control solenoid valve EC-323, "Description"
• EVAP control system pressure sensor EC-343, "Description"
• Fuel tank temperature sensor EC-269, "Description"
• Mass air flow sensor EC-183, "Description" Throttle position senso