System Check

Check all hoses and connections. With engine coolant below 45° F (8° C), remove air by-pass hose from air cleaner housing. Start engine. Air should be discharged from air by-pass hose. As engine warms up, air by-pass should stop.

Fig 1: Air Injection System (Pickup Cab & Chassis)
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Fig 2: Land Cruiser Air Injection System
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On Land Cruiser, disconnect hose from air switching valve to intake manifold and plug hose. On all models, race engine and quickly close throttle. Air should be discharged briefly from ASV on Land Cruiser, ABV on Corolla, and from by-pass hose on all other models.
On all models, disconnect VTV hose as shown. Air should be discharged from air by-pass hose within 10-20 seconds on Corolla and Land Cruiser, and within 15-30 seconds on all other models. Reconnect hose. See Fig 3.
Raise engine speed to 300) RPM. Air should be discharged from by-pass hose. Stop engine and reconnect all hoses. If system performed correctly, testing is complete. If not, check individual components as necessary, using testing procedures that follow.

Fig 3: VTV Hose Locations for System Check
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002