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Emission Control System (inspection) Toyota Prius C I

Auxiliary Emission Control Systems 6 illustrations ~497 words

Scheme 62

Scheme 62: ILLUSTRATION
Scheme 62: ILLUSTRATION

Scheme 63

Scheme 63: SYSTEM DIAGRAM
Scheme 63: SYSTEM DIAGRAM
*1Purge VSV*2Fuel Tank Cap
*3Fuel Tank*4Roll-over Valve
*5Canister Filter*6Fuel Cut-off Valve
*7ECM*8Canister Pump Module
*9Canister Pressure Sensor*10Pump Motor
*11Vent Valve*12Charcoal Canister
*aTo Intake Manifold*bPurge Line
*cAir Line*dVent Line

TEXT IN ILLUSTRATION

Scheme 64

Scheme 64
Scheme 64

Scheme 65

Scheme 65: ON-VEHICLE INSPECTION
Scheme 65: ON-VEHICLE INSPECTION

Scheme 66

Scheme 66
Scheme 66

Scheme 67

Scheme 67
Scheme 67
  1. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS Inspect the hoses and gaskets for scratches, cracks or air/oil leaks from the connecting parts. HINT: If the hoses or gaskets are damaged or some of the connections are loose, they may cause an engine stall or malfunction.
  2. INSPECT EVAPORATIVE EMISSION CONTROL SYSTEM Connect the Techstream to the DLC3. Disconnect the fuel vapor feed hose from the vacuum switching valve assembly shown in the illustration. Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . Start the engine. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control. Check that vacuum occurs at the purge VSV port. If vacuum does not occur, check the following items. HINT: Purge VSV (for canister purge) Clogging in the fuel vapor feed hose connecting the intake manifold and purge VSV Voltage from the ECM PRG terminal. Refer to «TERMINALS OF ECM»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) Exit Active Test mode and reconnect the fuel vapor feed hose. Enter the following menus: Powertrain / Engine and ECT / Data List / EVAP Purge VSV. Warm up the engine and drive the vehicle. Confirm that the purge valve opens. If the result is not as specified, replace the purge VSV, wire harness or ECM.
  3. CHECK FUEL TANK AND VENT LINE Disconnect the vent line tube from the charcoal canister assembly. Connect a pressure gauge to the vent line tube. TEXT IN ILLUSTRATION *1 Fuel Tank Cap *2 Vent Line Tube *3 Pressure Gauge - - Apply 4 kPa (0.04 kgf/cm 2 , 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. 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. 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. Reconnect the vent line tube to the charcoal canister assembly.
  4. INSPECT AIR LINE Disconnect the air line tube from the charcoal canister with bracket assembly. TEXT IN ILLUSTRATION *a Air Check that air flows freely into the air line. If air does not flow freely into the air line, repair or replace the air line tube. Reconnect the air line tube to the charcoal canister with bracket assembly.

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