Emission Control System On-Vehicle Inspection

Check that the purge line hose is connected correctly.

Disconnect the purge line hose from the canister and connect a vacuum gauge.

Using the procedure below, perform a purge VSV operation inspection when the engine coolant temperature is 55°C (131°F) or less (while the engine is cold (purge VSV is closed)).

HINT:

The ECM turns the purge VSV off so that the route between the canister and intake manifold is closed and fuel vapor in the canister is not purged to the intake manifold.

1. Purge VSV operation inspection procedure.
   1. When the engine is idling or running at 2500 rpm, the vacuum gauge indicates 1 kPa (25 mmHg, 0.3 in.Hg) or less.
   

   Result

   Result	Procedure
   Yes	Purge VSV operation normal
   No	Go to next step

   2. Inspect the purge VSV (LandCruiser RM000001CK001NX.html).
   

   Result

   Result	Procedure
   OK	Check wire harness and ECM
   NG	Replace purge VSV

Using the procedure below, perform a purge VSV operation inspection when the engine coolant temperature is 80°C (146°F) or higher (while the engine is hot (purge VSV is opened)).

HINT:

The ECM turns the purge VSV on so that a vacuum is created in the intake manifold and the fuel vapors of the canister are purged to the intake manifold.

1. Purge VSV operation inspection procedure.
   1. When the engine is idling, the vacuum gauge indicates 40 kPa (300 mmHg, 11.8 in.Hg) or higher.
   

   Result

   Result	Procedure
   Yes	Purge VSV operation normal
   No	Go to next step

   2. Inspect the purge VSV (LandCruiser RM000001CK001NX.html).
   

   Result

   Result	Procedure
   OK	Check wire harness, ECM and purge line hose between purge VSV and intake manifold
   NG	Replace purge VSV

Start and warm up the engine.

Maintain the engine speed at 3000 rpm.

Use a sound scope to check for injector operation noise.

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.

Check that there are no cracks, leaks or damage.

NOTICE:

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

1. 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.
   

Visually check for loose connections, sharp bends or damage.

Visually check for deformation, cracks or fuel leakage.

Start the engine and warm it up.

Turn the ignition switch off.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP: ON, ASV: OPEN and AIR PUMP: OFF, ASV: CLOSE.

HINT:

When Manual Mode is selected, the GTS initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, air pump and air switching valve operation can be selected.

Start the engine.

Perform the secondary air injection system intrusive operation while the engine is idling.

Check that the air pump (AIR PUMP), air switching valve (ASV) and pressure in the secondary air injection system passage (PRESSURE) status displayed on the GTS, indicate the conditions shown in the table below.

Standard:

Tester Operation	AIR PUMP	ASV	PRESSURE*
AIR PUMP: ON, ASV: OPEN	ON	ON	1.1 kPa or more
AIR PUMP: OFF, ASV: CLOSE	OFF	OFF	Less than 1.1 kPa

Turn the ignition switch off.

NOTICE:

1. This Secondary Air Injection Check only allows technicians to operate the secondary air injection 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 secondary air injection system operation using the GTS is prohibited, the GTS display indicates the prohibition (Wait or Error).
   If an Error is displayed on the GTS during the test, stop the engine for 10 minutes, and then try again.
   
2. Performing the Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If necessary, leave an interval of several minutes between System Check operations to prevent the system from overheating.
   
3. When performing the Secondary 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 Secondary Air Injection Check operation finishes.