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Home >> Lexus >> 2018 >> ES 350 >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission (Diagnostic Codes & Circuit Tests) >> Automatic Transaxle System >> DTC P0717: Input Speed Sensor Circuit No Signal; DTC P07BF: Input/Turbine Speed Sensor "A" Circuit Low; DTC P07C0: Input/Turbine Speed Sensor "A" Circuit High [07/2015 - ] >> Description
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DTC P0717: Input Speed Sensor Circuit No Signal; DTC P07BF: Input/Turbine Speed Sensor "A" Circuit Low; DTC P07C0: Input/Turbine Speed Sensor "A" Circuit High [07/2015 - ]: Description

This sensor detects the rotation speed of the turbine which shows the input revolution (speed) of the 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 shifts.

Fig 1: Identifying Input/Output Turbine Speed Sensor
GTY611635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION

*1 Counter Gear *2 Clutch Drum
*3 Output Speed Sensor NC *4 Input Speed Sensor NT
DTC No. DTC Detection Condition Trouble Area
P0717 TCM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1-trip detection logic)
(a) Vehicle speed: 50 km/h (31 mph) or more
(b) Park/neutral position switch (R) is OFF
(c) Speed sensor (NT): less than 300 rpm
  • Transmission revolution sensor (speed sensor NT)
  • Transmission wire
  • TCM
P07BF When the speed sensor input voltage is less than 0.1 V for 4.5 seconds or more. (1-trip detection logic)
P07C0 When the speed sensor input voltage is more than 1.9 V for 4.5 seconds or more. (1-trip detection logic)