Emission Control Systems: Testing and Inspection

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

ON-VEHICLE INSPECTION

1. VISUALLY CHECK HOSES, CONNECTORS AND GASKETS






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

NOTE:
- 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.

2. CHECK HOSES AND CONNECTORS
(a) Visually check for loose connections, sharp bends or damage.
3. INSPECT FUEL CUT OFF VALVE AND FILL CHECK VALVE






(a) Disconnect the vent line hose from the fuel tank Removal.
(b) Connect the pressure gauge to the fuel tank.
(c) Fill the fuel tank with fuel.
(d) Apply pressure of 4 kPa (41kgf/cm2, 0.58 psi) to the vent port of the fuel tank.
HINT: It is necessary to check the amount of fuel tank. When the fuel tank is full, the float valve of the fill check valve is closed and no air can pass through.

(e) Remove the fuel tank cap, and check that pressure drops.
If the pressure does not drop, replace the fuel tank assembly.
(f) Reconnect the vent line hose to the fuel tank Installation.
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.
5. INSPECT LEAK DETECTION PUMP (PRESSURE SENSOR)






(a) Measure the power source voltage of the ECM connectors.
Standard voltage:





If the voltage is not as specified, check the ECM, leak detection pump and wire harness.

(b) Measure the power output of the ECM connectors.
(1) Remove the fuel tank cap.
Standard voltage:





- If the voltage is not as specified, check the ECM, leak detection pump and wire harness.
(2) Install the fuel tank cap.
6. CHECK FUEL TANK ASSEMBLY
(a) Visually check for deformation, cracks or fuel leakage.