LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0717 Input Speed Sensor Circuit No Signal >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0717 Input Speed Sensor Circuit No Signal: Description

This sensor detects the rotation speed of the turbine, which shows the input revolution of the transmission. By comparing the input speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects the shift timing of the gears and controls the engine torque and hydraulic pressure according to various conditions, providing smooth gear shift.

Fig 1: Identifying Clutch Drum, Parking Gear And Speed Sensors
G05282645Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
P0717 All conditions below are detected for 5 sec. or more (1 trip detection logic):
  1. Gear changes not performed
  2. Gear position: 4th or 5th
  3. Transmission input shaft rpm: 300 rpm or less
  4. Transmission output shaft rpm: 1,000 rpm or more
  5. PNP switch is OFF
  6. Shift solenoid valves and PNP switch are operating normally
  • Open or short in speed sensor NT circuit
  • Speed sensor NT
  • ECM
  • Automatic transmission (clutch, brake or gear, etc.)
  1. Reference: Inspect using an oscilloscope. 

    Check the waveform of the ECM connector.

    Standard voltage: Refer to illustration  

    STANDARD VOLTAGE SPECIFICATION

    Item Content
    Tester Connection E7-35 (NT+) - E7-27 (NT-)
    Tool Setting 1 V/DIV., 2 msec./DIV.
    Condition Engine idle speed (shift lever on P or N)
    Fig 2: Waveform Graph (ECM Connector)
    G05282646Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002