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Home >> Lexus >> 2010 >> ES 350 >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Automatic Transaxle) >> Automatic Transaxle System >> DTC P0715 Input / Turbine Speed Sensor Circuit Malfunction; DTC P0717 Input Speed Sensor Circuit No Signal >> System Description
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System Description

WARNING: This page is about a different car, the 2007 Lexus ES 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 revolution of transaxle. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the TCM 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: Identifying Counter Gear, Input Speed Sensor, Output Speed Sensor And Clutch Drum
G04976566Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC DETECTION CONDITION AND TROUBLE AREA

DTC No. DTC Detection Condition Trouble Area
P0715 When the speed sensor input voltage is either more than 1.9 V or less than 0.1 V for 4.5 seconds or more.
  • Transmission revolution sensor (speed sensor NT)
  • TCM
P0717 ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more (1-trip detection logic):
  1. Vehicle speed: 31 mph (50 km/h) or more
  2. Park/neutral position switch (STAR and R) is OFF
  3. Speed sensor (NT): less than 300 rpm