Emission Control Systems: Testing and Inspection

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

1. CHECK PURGE VSV

(a) Enter the following menus:





(1) Techstream - Select: Powertrain / Engine and ECT / Active test / Activate the VSV for Evap Control.

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

(c) Start the engine.

(d) Using the tester, turn off the purge VSV (EVAP VSV: OFF).

(e) Use your finger to confirm that the purge VSV has no suction.

(f) Using the tester, turn on the purge VSV (EVAP VSV: ON).

(g) Use your finger to confirm that the purge VSV has suction.

2. INSPECT FUEL CUT OFF / RESTART RPM

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

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

(c) Check that when the throttle lever is released, injector operation sound stops momentarily and then resumes (at 1400 rpm).

Standard:





3. VISUALLY INSPECT HOSE, CONNECTIONS AND GASKETS

(a) Check for cracks, leaks or damage.





HINT
Separation of the engine oil dipstick, oil filler cap, PCV hose, etc. may cause the engine to run improperly. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause the engine to run improperly.

4. CHECK AIR INLET LINE

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





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

If air cannot flow freely into the air inlet line, repair or replace it.

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