4 Runner 2WD L4-144.4 2366cc 2.4L SOHC (22R-E) (1990)
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Air Injection Control Valve: Description and Operation
Fig. 26 Air Suction System Schematic
The VSV that controls operation of the air suction system is switched electronically by the ECU. Based on information received from the water
temperature sensor and engine rpm, the ECU completes the circuit and opens the VSV. The VSV inputs the ECU through terminal AS.