Emission Control Systems: Testing and Inspection

2GR-FSE EMISSION CONTROL: EMISSION CONTROL SYSTEM: ON-VEHICLE INSPECTION

1. CHECK FUEL CUT RPM

(a) Start and warm up the engine.

(b) Increase the engine speed to at least 3000 rpm.

(c) Use a sound scope to check for injector operating sounds.

(d) When the accelerator pedal is released, check that injector operating sounds stop momentarily (at 2500 rpm or higher) and then resume (at 1400 rpm).

Standard:





If the result is not as specified, check the injectors, wiring and ECM.

2. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS

(a) Visually check that the hoses, connections and gaskets have no cracks, leaks or damage.





HINT
Detachment or other problems with the engine oil dipstick, filler cap, ventilation hose and other components may cause the engine to run improperly.

If any defects are found, replace parts as necessary.

3. INSPECT EVAPORATIVE EMISSION CONTROL SYSTEM

(a) Start the engine.

(b) Disconnect the fuel vapor feed hose shown in the illustration.





(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.

(g) Check that vacuum occurs at the VSV port.

(h) Exit Active Test mode and reconnect the fuel vapor feed hose.

(i) Enter the following menus: Powertrain / Engine / Data List / EVAP Purge VSV.

(j) Warm up the engine and drive the vehicle.

(k) Confirm that the purge VSV opens.

If the result is not as specified, replace the VSV, wire harness or ECM.

4. CHECK FUEL TANK AND VENT LINE

(a) Disconnect the vent line hose from the canister.

(b) Connect the pressure gauge to the vent line hose.





Text in Illustration





(c) Apply 4 kPa (0.04 kgf/cm2, 0.6 psi) 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 fill check valve closes and the pressure is released through the 2 mm orifice. As a result, when the fuel tank cap is removed, the pressure does not 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 the pressure is released smoothly.

HINT
If the pressure does not drop, replace the fuel tank assembly.

(f) Reconnect the vent line hose to the canister.

5. INSPECT AIR INLET LINE

(a) Disconnect the air inlet line hose from the charcoal canister.





(b) Check that air flows freely into the air inlet line.

If air does not flow freely into the air inlet line, repair or replace the air inlet line hose.

(c) Reconnect the air inlet line hose to the charcoal canister.