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AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE), Diagnostic DTC:P0717

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DTC Code DTC Name
P0717 Turbine Speed Sensor Circuit No Signal
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DESCRIPTION

This sensor detects the rotation speed of the turbine which indicates the input speed 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, and as a result, the gears shift smoothly.

DTC Code DTC Detection Condition Trouble Area
P0717

All conditions are met for 5 seconds or more (1 trip detection logic):

(a) Gear shift is not being performed.

(b) Transmission is in 4th, 5th or 6th gear.

(c) Transmission input shaft speed is 300 rpm or less.

(d) Transmission output shaft speed is 1000 rpm or more.

(e) Park/neutral position switch NSW and R input signals are OFF.

(f) Shift solenoid valves and park/neutral position switch are normal.

  • 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
Terminal No. (Symbol) Tool Setting Condition Specified Condition
C45-124 (NT+) - C45-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine is idling (Shift lever in P or N) Refer to illustration
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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 turbine speed). The ECM outputs a gear shift signal by comparing the input speed sensor NT signal with the output speed sensor SP2 signal.

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

Tip:

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

  • *2: The vehicle speed is approximately 50 km/h (30 mph) or more.

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WIRING DIAGRAM

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INSPECTION PROCEDURE


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  1. DATA LIST

    Tip:

    Using the intelligent tester 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 intelligent tester to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the intelligent tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List.

    7. According to the display on the intelligent tester, read the Data List.

      Table 1. 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 is:


      • 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

      		 Data is displayed in increments of 50 rpm.
      Tip:

      • 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 (30 mph) or more:

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

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PROCEDURE


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    INSPECT SPEED SENSOR NT INSTALLATION


    1. A0155C1E02

      Check the speed sensor NT installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
      Table 2. Text in Illustration
      *a CORRECT
      *b INCORRECT

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    INSPECT SPEED SENSOR NT


    1. A0157CGE07

      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
      Table 3. Text in Illustration
      *a

      Component without harness connected

      (Speed Sensor NT)

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    CHECK HARNESS AND CONNECTOR (SPEED SENSOR NT - ECM)


    1. A015CW9E17

      Disconnect the ECM connector.

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

      Standard Resistance
      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
      Table 4. Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

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    SECURELY INSTALL OR REPLACE SPEED SENSOR NT

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    REPLACE ECMClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE SPEED SENSOR NTClick here