AUTOMATIC TRANSMISSION SYSTEM (for 1UR-FE), 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 the 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. As a result, the gears shift smoothly.

DTC Code DTC Detection Condition Trouble Area
P0717

All the conditions below are detected for 5 sec. or more (1 trip detection logic).

(a) Gear change is not performed.

(b) The gear position is 4th, 5th or 6th.

(c) The T/M input shaft rpm is 300 rpm or less.

(d) The T/M output shaft rpm is 1000 rpm or more.

(e) The park/neutral position switch:


  • The NSW input signal is OFF.

  • The R input signal is OFF.

(f) The shift solenoid valves and park/neutral position switch are operating normally.

  • 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.

Standard
for LHD
Terminal No. (Symbol) Tool Setting Condition Specified Condition
C45-124 (NT+) - C45-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine idling (shift lever in P or N) Refer to illustration
for RHD
Terminal No. (Symbol) Tool Setting Condition Specified Condition
C46-124 (NT+) - C46-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine idling (shift lever in P or N) Refer to illustration
A015CAIE01

MONITOR DESCRIPTION

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

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

Tech Tips


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

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

WIRING DIAGRAM

A015B0LE03

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).

    5. Turn the GTS on.

    6. Enter the following menus: 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

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

      		 The 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 SPEED SENSOR NT INSTALLATION


    1. A0155C1E03
      Text in Illustration
      *a CORRECT
      *b INCORRECT

      Check the speed sensor NT installation.

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

    NG

    SECURELY INSTALL OR REPLACE SPEED SENSOR NT Click here

    OK

  2. INSPECT SPEED SENSOR NT


    1. A0157CGE07
      Text in Illustration
      *a

      Component without harness connected

      (Speed Sensor NT)

      Disconnect the speed sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 560 to 680 Ω

    NG

    REPLACE SPEED SENSOR NT Click here

    OK

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


    1. A015CW9E49
      Text in Illustration
      *1 for LHD
      *2 for RHD
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      C45-124 (NT+) - C45-123 (NT-) 20°C (68°F) 560 to 680 Ω
      C45-124 (NT+) - Body ground Always 10 kΩ or higher
      C45-123 (NT-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      C46-124 (NT+) - C46-123 (NT-) 20°C (68°F) 560 to 680 Ω
      C46-124 (NT+) - Body ground Always 10 kΩ or higher
      C46-123 (NT-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here