Emission Control Systems: Testing and Inspection

1GR-FE EMISSION CONTROL: EMISSION CONTROL SYSTEM: ON-VEHICLE INSPECTION

1. CHECK PURGE VSV

(a) Connect the Techstream to the DLC3.

(b) Remove the V-bank cover Removal.

(c) Disconnect the hose (connected to the canister) from the purge VSV.





(d) Start the engine and turn the Techstream on.

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

(f) Check that a vacuum occurs at the VSV port.

OK:





If vacuum does not occur, check the following items.

HINT
* VSV (for canister purge)
* Clogging in the fuel vapor feed hose connecting the intake air surge tank and VSV
* Voltage from the ECM PRG terminal

(g) Exit the Active Test mode and connect the hose (connected to the canister) to the purge VSV.

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

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

(j) Confirm that the purge VSV opens.

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

(k) Install the V-bank cover Installation.

2. INSPECT FUEL CUT-OFF RPM

(a) Start and warm up the engine.

(b) Increase the engine speed to at least 3500 rpm.

(c) Use a sound scope to check for injector operation noise.

(d) Check that when the accelerator pedal is released, injector operation noise stops momentarily and then resumes.

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

3. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS

(a) Check that there are no cracks, leaks or damage.

NOTICE:
* Detachment or other problems with the engine oil dipstick, filler cap, ventilation hose and other components may cause the engine to run improperly.
* Air suction caused by disconnections, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause engine failure or engine malfunctions.

If the result is not as specified, replace parts as necessary.

4. CHECK HOSES AND CONNECTORS

(a) Visually check for loose connections, sharp bends or damage.

5. CHECK FUEL TANK ASSEMBLY

(a) Visually check for deformation, cracks or fuel leakage.

6. INSPECT FUEL CUT OFF VALVE AND FILL CHECK VALVE

(a) Disconnect the vent line hose from the fuel tank.

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

(c) Fill the fuel tank with fuel.

(d) Apply pressure at 4 kPa (0.04 kgf/cm2, 0.58 psi) to the vent port of the fuel tank.

HINT
Check the amount of fuel left in the fuel tank.

(e) Remove the fuel tank cap, and check that the pressure decreases.





If the pressure does not decrease, replace the fuel tank assembly.

(f) Reconnect the vent line hose to the fuel tank.

7. CHECK AIR INLET DUCT

(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.

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

8. INSPECT CANISTER PUMP MODULE (Pressure Sensor)





(a) Check the power source voltage for pressure sensor.

(1) Measure the voltage according to the value(s) in the table below.

Standard voltage:





If the voltage is not as specified, check the ECM, canister pump module and wire harness.

(b) Check the output voltage of pressure sensor.

(1) Remove the fuel tank cap.

(2) Measure the voltage according to the value(s) in the table below.

Standard voltage:





If the voltage is not as specified, check the ECM, canister pump module and wire harness.

(3) Install the fuel tank cap.