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1.Start up the engine and run on at idle speed.
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2.When turning the ignition switch to the LOCK (OFF) position and stopping the engine, check that the operating sound of the throttle valve control servo is heard from the throttle body: the short "wheeen" sound is heard.
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3.If the operating sound is not heard, check the drive circuit of the throttle valve control servo.
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1.Disconnect the electronic-controlled throttle valve connector.
2.Measure resistance between terminal No. 5 and No. 6 at the throttle valve control servo connector.
Standard value: 0.3 - 100 Ω (at 20 °C)
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If the measured resistance deviates from the standard value, fully open the throttle valve with your finger more than five times, then check the result again.
If the throttle valve control serve is not used for an extended period of time, the resistance may be increased as a result of internal forming of oxide film. Therefore, it means that the oxide film can be removed through a self cleaning capability of the throttle valve control servo, if forcibly moved.
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3.If resistance is outside the standard value, replace the throttle body assembly.
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