1Nz-fe emission control – emission control system

1NZ-FE EMISSION CONTROL – EMISSION CONTROL SYSTEM

EC–1

EMISSION CONTROL SYSTEM
1NZ-FE ENGINEEMISSION CONTROL

PARTS LOCATION

PURGE LINE FUEL VAPOR FEED HOSE NO.1 FUEL TANK REFUELING VALVE

CANISTER

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PURGE VSV

FUEL VAPOR FEED HOSE NO.2 CANISTER FILTER

CANISTER PRESSURE SENSOR LEAK DETECTION PUMP VENT VALVE

PUMP MODULE

AIR INLET PORT FUEL TANK CAP

A119185E01EC–2

1NZ-FE EMISSION CONTROL – EMISSION CONTROL SYSTEM

for Hatchback:

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CANISTER HEATED OXYGEN SENSOR PURGE VSV AIR FUEL RATIO SENSOR

FUEL TANK CAP

A117786E01

1NZ-FE EMISSION CONTROL – EMISSION CONTROL SYSTEM

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for Sedan:

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CANISTER HEATED OXYGEN SENSOR AIR FUEL RATIO SENSOR VACUUM SWITCHING VALVE

FUEL TANK CAP

A133333E01

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1NZ-FE EMISSIONCONTROL – EMISSION CONTROL SYSTEM

ON-VEHICLE INSPECTION
1. INSPECT FUEL CUT-OFF RPM (a) Start and warm up the engine. (b) Increase the engine speed to approximately 3,500 rpm. (c) Using a sound scope, check the operation sound of the injector. (d) Release the accelerator pedal. Check that the operation noise stops momentarily and then resumes. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS (a)Check that there are no cracks, leakage or scratches on the hoses, connections or gaskets. HINT: • Removing the oil level gauge, oil filter cap or PCV hose may cause the engine to malfunction or stall. • Disconnections, looseness or cracks in the parts of the air induction system between the intake system and cylinder head will allow air suction and cause the engine to run improperly. CHECK LINEAND CONNECTORS (a) Visually check for loose connections, sharp bends and damage. CHECK FUEL TANK ASSEMBLY (a) Visually check for deformation, cracks and fuel leakage. CHECK FUEL TANK AND VENT LINE
Vent Line Hose Fuel Tank Cap

2.

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B000412E01

3.

4.

5.

Canister
A119153E01

(a) Disconnect the vent line hose from the canister. (b) Connect the pressure gauge to the vent linehose.

1NZ-FE EMISSION CONTROL – EMISSION CONTROL SYSTEM

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(c) Apply 4 kPa (41 kgf/cm2, 30 mmHg) of pressure to the vent line of the fuel tank. HINT: Perform this inspection with the fuel tank less than 90% full. When the fuel tank is full, the fuel cutoff valve closes and the pressure is released through the 2 mm orifice. As a result, when the fuel tank cap is removed, the pressure doesnot decrease smoothly. (d) Check that the fuel tank pressure is maintained for some time, and does not decrease immediately. HINT: If the pressure decreases immediately, one of the following may apply: • The fuel tank cap is not completely tightened. • The fuel tank cap is damaged. • Air is leaking from the vent line. • The fuel tank is damaged. (e) When the fuel tank cap is removed, check that thepressure is released smoothly. HINT: If the pressure does not drop, replace the fuel tank assembly. (f) Reconnect the vent line hose to the canister. 6. CHECK AIR INLET LINE (a) Disconnect the air inlet line hose from the canister. (b) Check that air flows freely into the air inlet line. HINT: If air does not flow freely into the air inlet line, repair or replace it. (c) Reconnect the air inletline hose to the canister.

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1NZ-FE EMISSION CONTROL – CANISTER

CANISTER
1NZ-FE ENGINEEMISSION CONTROL

COMPONENTS

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PURGE LINE HOSE

AIR INLET LINE HOSE
19 (194, 14)

CANISTER

VENT LINE HOSE
19 (194, 14)

CANISTER PUMP MODULE CONNECTOR

N*m (kgf*cm, ft.*lbf) : Specified torque
A115460E01

1NZ-FE EMISSION CONTROL – CANISTER

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REMOVAL
1. 2.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL REMOVE CANISTER (a) Disconnect the connector.

A115473

(b) Disconnect the purge line hose. (c) Disconnect the air inlet line hose from the leak detection pump. (d) Disconnect the vent line hose from the canister.

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A115474

(e) Remove the 3 bolts and the canister assembly.

A115475

INSPECTION
1. INSPECT CANISTER (a) Visually check...