Emission Control System (W/ Secondary Air Injection System) On-Vehicle Inspection


  1. CHECK PURGE VSV

  2. INSPECT FUEL CUT-OFF RPM

  3. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS

  4. CHECK HOSES AND CONNECTORS

  5. CHECK FUEL TANK ASSEMBLY

  6. INSPECT SECONDARY AIR INJECTION SYSTEM OPERATION

Emission Control System (W/ Secondary Air Injection System) -- On-Vehicle Inspection



1. CHECK PURGE VSV

  1. Connect the intelligent tester to the DLC3.

  1. Remove the V-bank cover (LandCruiser RM00000456D014X_01_0004.html).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

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

  1. Start the engine and turn the tester on.

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

    OK:
    Tester Operation
    		Specified Condition
    EVAP VSV: OFF
    		Purge VSV has no suction
    EVAP VSV: ON
    		Purge VSV has suction

  1. Connect the hose (connected to the canister) to the purge VSV.

  1. Install the V-bank cover (LandCruiser RM00000456B015X_01_0008.html).



2. INSPECT FUEL CUT-OFF RPM

  1. Start and warm up the engine.

  1. Increase the engine speed to at least 3500 rpm.

  1. Use a sound scope to check for injector operation noise.

  1. 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

  1. Check that there are no cracks, leaks or damage.

    NOTICE:
    1. Detachment or other problems with the engine oil dipstick, filler cap, PCV hose and other components may cause the engine to run improperly.
    2. 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

  1. Visually check for loose connections, sharp bends or damage.



5. CHECK FUEL TANK ASSEMBLY

  1. Visually check for deformation, cracks or fuel leakage.



6. INSPECT SECONDARY AIR INJECTION SYSTEM OPERATION

  1. Start the engine and warm it up.

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Utility / Air injection check / Manual Mode / AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN and AIR PUMP 1: OFF, ASV1: CLOSE, AIR PUMP 2: OFF, ASV2: CLOSE.

    HINT:
    When Manual Mode is selected, intelligent tester initialization (atmospheric pressure measurement) is performed automatically. Initialization takes 10 seconds. After initialization, AIR PUMP and ASV operation can be selected.

  1. Start the engine.

  1. Perform the AIR system intrusive operation while the engine is idling.

  1. Check that the air pump (AIR PUMP), ASV and pressure in the AIR system passage (PRESSURE) status displayed on the intelligent tester indicate the conditions shown in the table below.

    Standard:

    Tester Operation
    		AIR PUMP
    		ASV
    		PRESSURE*1
    		PULSATION*2
    AIR PUMP: ON, ASV: OPEN
    		ON
    		ON
    		2.4 kPa or higher
    		20 kPa or higher
    AIR PUMP: OFF, ASV: CLOSE
    		OFF
    		OFF
    		Below 2.4 kPa
    		Below 30 kPa
    *1:
    Average pumping pressure (gauge pressure). The pressure should be 2.4 kPa or higher when the AIR system operates.
    *2:
    The cumulative exhaust pulsation calculated by the ECM. If the calculated value exceeds a certain level, the ECM determines that the exhaust pulsation is in the AIR system.

  1. Turn the ignition switch off.

    NOTICE:
    1. Air Injection Check only allows technicians to operate the AIR system for a maximum of 5 seconds.
      Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks.
      While AIR system operation using the intelligent tester is prohibited, the intelligent tester display indicates the prohibition (WAIT or ERROR).
      If ERROR is displayed on the intelligent tester during the test, stop the engine for 10 minutes, and then try again.
    2. Performing Air Injection Check repeatedly may cause damage to the AIR system. If necessary, leave an interval of several minutes between Air Injection Check operations to prevent the system from overheating.
    3. When performing the Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.
    4. Turn the ignition switch off when the Air Injection Check operation finishes.