DTC P0717: Turbine Speed Sensor Circuit No Signal [10/2015 - 11/2017]: Description

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

This sensor detects the rotation speed of the turbine which shows the input shaft revolution speed. By comparing the input turbine speed signal (NT) with the counter gear speed signal (SP2), 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 shifts.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0717	Turbine Speed Sensor Circuit No Signal	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other Output shaft speed is 1000 rpm or more (vehicle speed is 50 km/h (31 mph) or more), and the park/neutral position switch assembly (P, NSW and R) is OFF. The speed indicated by the transmission revolution sensor (NT) is less than 300 rpm. 5 seconds 1-trip detection logic	Open or short in transmission revolution sensor (NT) circuit Transmission revolution sensor (NT) ECM Automatic transmission (clutch, brake, gear, etc.)	Comes on	DTC stored

Reference (Using an oscilloscope):

Check the waveform between the terminals NT+ and NT- of the ECM connector.

Standard

Refer to the illustration.

Item	Content
Terminal	NT+ - NT-
Tool setting	1 V/DIV., 2 ms./DIV.
Vehicle condition	Engine idle speed (shift lever in P or N)