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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A650E >> Operation >> ECM Output Devices >> No. 1, No. 2, No. 3 & No. 4 Solenoids

No. 1, No. 2, No. 3 & No. 4 Solenoids

ECM controls transmission shifting by delivering an output signal to operate proper solenoid. Solenoids are located on transmission valve body. See Figure. Solenoids are operated in accordance with selector lever position. If a solenoid malfunctions, fail-safe gear may be selected. See Figure.

NOTE: In some gears, ECM provides a fail-safe system which will place transmission in designated gear depending on solenoid failure.
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