DTC P0717 Input Speed Sensor Circuit No Signal: Description

This sensor detects the rotation speed of the turbine. By comparing the input turbine speed signal (NT) with the output shaft speed signal, the ECM detects the shift timing of the gears and controls the engine torque and hydraulic pressure according to various conditions. As a result, smooth gear shift is achieved.

DTC DETECTION CONDITION

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 Solenoid valves and park/neutral position switch are normal Speed sensor NT: Less than 300 rpm	Open or short in speed sensor NT circuit Speed sensor NT ECM Automatic transaxle (clutch, brake, gear, etc.)

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

OK: Refer to illustration

WAVEFORM REFERENCE

Item	Content
Tester Connection	E6-35 (NT+) - E6-27 (NT-)
Tool Setting	5 V/DIV., 0.5 msec./DIV.
Condition	Vehicle speed 20 km/h (12 mph)

Fig 1: Waveform Graph