DTC P0717 Input Speed Sensor Circuit No Signal: Description

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. 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 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

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DTC DETECTION CONDITION AND TROUBLE AREA

DTC No.	DTC Detection Condition	Trouble Area
P0717	All conditions below are detected for 5 sec. or more (1 trip detection logic): Gear changes not performed Gear position: 4th or 5th Transmission input shaft rpm: 300 rpm or less Transmission output shaft rpm: 1,000 rpm or more PNP switch is OFF 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.)

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

Standard voltage: Refer to illustration.

WAVEFORM REFERENCE

Item	Content
Tester Connection	E6-35 (NT+) - E6-27 (NT-)
Tool Setting	1 V/DIV., 2 msec./DIV.
Condition	Engine idle speed (shift lever on P or N)

Fig 2: Signal Waveform Graph