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Home >> Lexus >> 1994 >> SC 400 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Sub-Throttle Position (Sub-TP) Sensor (With TRAC)
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Sub-Throttle Position (Sub-TP) Sensor (With TRAC)

Vehicles with Traction Control (TRAC) system are equipped with a secondary (sub) throttle plate that is controlled by an electric actuator. The ECM monitors the angle of this sub-throttle plate by applying a reference voltage to the sub-TP sensor, which operates like the TP (main) sensor. Sub-TP sensor also contains an idle switch.

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