DTC P0717: Input Speed Sensor Circuit No Signal: Description

WARNING: This page is about a different car, the 2006 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 Speed Sensor SP2 & Speed Sensor Signal NT

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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.)

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 Fig 2

ITEM AND CONTENT 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: Waveform Graph