DTC P0717: Turbine 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. As a result, smooth gear shifting is achieved.

Fig 1: Identifying Turbine Speed Sensor

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DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0717	ECM detects conditions (a), (b) and (c) continually for 5 sec. or more (1 trip detection logic): Output shaft speed is 1,000 rpm or more Park/neutral position switch: NSW input signal is OFF R input signal is OFF Speed sensor (NT): less than 300 rpm	Open or short in speed sensor NT circuit Speed sensor NT ECM Automatic transmission (clutch, brake, gear, etc.)

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

OK:

Refer to Fig 2.

TESTER CONNECTION SPECIFIED CONDITION CHART

Item	Content
Tester Connection	E3-21 (NT+) - E3-20 (NT-)
Tool Setting	1 V/DIV., 2 msec./DIV.
Condition	Engine is idling (shift lever on P or N)

Fig 2: Identifying Waveform