DTC P0717 Input Speed Sensor Circuit No Signal: Description

WARNING: This page is about a different car, the 2006 Scion tC. 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 transaxle. By comparing the input speed signal (NT) with the counter gear speed sensor signal (NC), 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.

TERMINAL SPECIFICATION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0717	ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1 trip detection logic) Vehicle speed: 50 km/h (31 mph) or more PNP switch (NSW, R and L) is OFF Speed sensor NT: Less than 300 rpm	Open or short in speed sensor NT circuit Speed sensor NT ECM

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

OK:

Refer to illustration

WAVEFORM REFERENCE

Item	Content
Tester Connection	E7-27 (NT+) - E7-35 (NT-)
Tool Setting	5 V/DIV., 0.5 msec./DIV.
Condition Vehicle speed	20 km/h (12 mph)

Fig 1: Checking Waveform Of ECM Connector