AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0717

DTC Code DTC Name
P0717 Turbine Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the turbine which shows the input revolution of transmission. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

DTC No. DTC Detection Condition Trouble Area
P0717

  • ECM detects conditions (a), (b) and (c) continuity for 5 sec. or more: (1-trip detection logic)


    • (a) Output shaft speed is 1000 rpm or more (Vehicle speed: 50 km/h (31 mph) or more)

    • (b) Park/neutral position switch:


      • - P input signal is OFF

      • - NSW input signal is OFF

      • - R input signal is OFF


    • (c) Transmission revolution sensor (NT): less than 300 rpm

  • Open or short in transmission revolution sensor (NT) circuit

  • Transmission revolution sensor (NT)

  • ECM

  • Automatic transmission (clutch, brake or gear, etc.)

Reference (Using an oscilloscope):

Check the waveform between the terminals NT+ and NT- of the ECM connector.

A01FEA4E06
Standard
Refer to the illustration.
Terminal NT+ - NT-
Tool setting 1 V/DIV, 2 ms./DIV.
Vehicle condition Engine idle speed (P or N position)

MONITOR DESCRIPTION

This DTC indicates that pulse is not output from the transmission revolution sensor (NT) (Turbine (input) speed sensor ) or is output only little. The NT terminal of the ECM detects the revolving signal from transmission revolution sensor (NT) (input RPM). The ECM outputs a gearshift signal comparing the transmission revolution sensor (NT) with the transmission revolution sensor (SP2).

While the vehicle is operating in the 4th, 5th or 6th gear position in the shift position of D, if the input shaft revolution is less than 300 rpm*1 although the output shaft revolution is 1000 rpm or more*2, the ECM detects the trouble, illuminates the MIL and stores the DTC.

*1: Pulse is not output or is irregularly output.

*2: The vehicle speed is approx. 50 km/h (31 mph) or more.

WIRING DIAGRAM

A01FD9IE01

INSPECTION PROCEDURE


  1. DATA LIST

    Tech Tips

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG) position.

    5. Turn the GTS on.

    6. Select the item "Powertrain / Engine and ECT / Data List".

    7. According to the display on the GTS, read the "Data List".

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SPD (NT)

      Input shaft speed/

      Min.: 0 rpm

      Max.: 12750 rpm

      • Lock-up ON (after warming up engine): Input turbine speed (NT) equal to engine speed

      • Lock-up OFF (idling with shift lever in N): Input turbine speed (NT) nearly equal to engine speed

      		 Data is displayed in increments of 50 rpm.

      Tech Tips


      • SPD (NT) is always 0 while driving:

        Open or short in the sensor or circuit.

      • SPD (NT) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more:

        Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

PROCEDURE


  1. INSPECT TRANSMISSION REVOLUTION SENSOR (NT) INSTALLATION


    1. A01FHSOE43

      Check the transmission revolution sensor (NT) installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.

    NG

    SECURELY INSTALL TRANSMISSION REVOLUTION SENSOR (NT) OR REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here

    OK

  2. INSPECT TRANSMISSION REVOLUTION SENSOR (NT)


    1. A01FH1FE05
      Text in Illustration
      *1

      Component without harness connected

      (Transmission Revolution Sensor (NT))

      Disconnect the transmission revolution sensor (NT) connector from the transmission.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      1 - 2 560 to 680 Ω

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM)


    1. A01FET9E01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to ECM)

      Connect the transmission revolution sensor (NT) connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      F4-16 (NT+) - F4-15 (NT-) 560 to 680 Ω

    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for short)
      Tester Connection Specified Condition
      F4-16 (NT+) - Body ground 10 kΩ or higher
      F4-15 (NT-) - Body ground ↑

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here