REMOVAL PROCEDURE 1. REMOVE V-BANK COVER SUB-ASSEMBLY 2. REMOVE AIR CLEANER HOSE ASSEMBLY 3. DISCONNECT NO. 3 VENTILATION HOSE
4. DISCONNECT NO. 1 AIR HOSE
5. REMOVE AIR SWITCHING VALVE ASSEMBLY
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Toyota Tundra Service Manual > Emission Control System: On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT FUEL CUT-OFF OPERATION (a) Start and warm up the engine. (b) Open the throttle valve and keep the engine speed at 3000 rpm. (c) Use a sound scope to check for injector operating noise. (d) Check that when the accelerator pedal is released, injector operatio ...