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Home >> Toyota >> 2005 >> ECHO 2D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - U340E - Diagnostics) >> Circuit Inspection >> DTC P0717: Turbine Speed Sensor Circuit No Signal >> Circuit Description

Circuit Description

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This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the speed sensor signal (SPD), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure in response to various conditions, thus performing smooth gear shifting.

Fig 1: DTC - P0717 Trouble Detection Chart
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