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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission Electronic Controlled (ECT) - U241E/U140F - Diagnostics) >> 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 counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

Fig 1: DTC Trouble Area Chart
G02908781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reference (Using an oscilloscope): Check the waveform between the terminals NT+ and NT - of the ECM connector.

Standard: Refer to the illustration. 

REFERENCE CHART

Terminal NT+ - NT-
Tool setting 5V/DIV, 0.5ms/DIV
Vehicle condition Vehicle speed 20 km/h (12 mph)
Fig 2: Checking Waveform Between Terminals NT+ And NT - Of ECM Connector
G02908782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002