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AUTOMATIC TRANSMISSION SYSTEM(for 1GD-FTV), Diagnostic DTC:P0715, P0717, P07BF, P07C0

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DTC Code DTC Name
P0715 Input / Turbine Speed Sensor Circuit Malfunction
P0717 Input Speed Sensor Circuit No Signal
P07BF Input/Turbine Speed Sensor "A" Circuit Low
P07C0 Input/Turbine Speed Sensor "A" Circuit High
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DESCRIPTION

This sensor detects the rotation speed of the turbine which shows the input turbine speed of the transmission. By comparing the input turbine speed signal (NT) with the output shaft 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 No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0715 Input / Turbine Speed Sensor Circuit Malfunction When the transmission revolution sensor (NT) input voltage is either higher than 1.9 V or below 0.1 V for 4.5 seconds or more (1 trip detection logic).

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

  • Transmission revolution sensor (NT)

  • ECM

 Comes on DTC stored
P0717 Input Speed Sensor Circuit No Signal

All conditions are met for 5 seconds or more (1 trip detection logic*1, 2 trip detection logic*2):

(a) Park/neutral position switch D input signal is ON.

(b) Gear position is 2nd, 3rd, 4th, 5th or 6th.

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

(d) The vehicle speed is 9 km/h (5.6 mph) or more.

(e) Transmission revolution sensor (NT) value is less than 300 rpm.

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

  • Transmission revolution sensor (NT)

  • ECM

 Comes on DTC stored
P07BF Input/Turbine Speed Sensor "A" Circuit Low When the transmission revolution sensor (NT) input voltage is below 0.1 V for 4.5 seconds or more (2 trip detection logic).

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

  • Transmission revolution sensor (NT)

  • ECM

 Comes on DTC stored
P07C0 Input/Turbine Speed Sensor "A" Circuit High When the transmission revolution sensor (NT) input voltage is higher than 1.9 V for 4.5 seconds or more (2 trip detection logic).

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

  • Transmission revolution sensor (NT)

  • ECM

 Comes on DTC stored

*1: w/ OBD

*2: w/o OBD

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MONITOR DESCRIPTION

The transmission revolution sensor (NT) detects the transmission input shaft speed. The ECM calculates gear shifts comparing the transmission revolution sensor (NT) with the transmission revolution sensor (SP2).

While the vehicle is operating in 2nd, 3rd, 4th, 5th or 6th gear with the shift lever in D, if the input shaft speed is less than 300 rpm*1 and the output shaft speed is more than 1000 rpm*2, the ECM interprets this as a fault, illuminates the MIL and stores the DTC.

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

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

Table 1. *a Transmission Revolution Sensor (NT)
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Tip:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the D Position Shift Test in Road Test and drive the vehicle for 5 seconds or more at 50 km/h (31 mph) or more.*1

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  2. Turn the ignition switch off (w/o OBD).

  3. Perform step (*1) again (w/o OBD).

  4. Check for DTCs again.

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  1. DATA LIST

    Tip:

    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 ignition switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    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.


      1. Powertrain > Engine > Data List
        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 the engine): Value from transmission revolution sensor (NT) equal to engine speed

        • Lock-up off (idling with shift lever in N): Value from transmission revolution sensor (NT) nearly equal to engine speed

        		 Data is displayed in increments of 50 rpm



      1. Powertrain > Engine > Data List
        Tester Display
        SPD (NT)




      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 (31 mph) or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

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PROCEDURE


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    READ VALUE USING GTS (SPD (NT) AND NT SENSOR VOLTAGE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. In accordance with the display on the GTS, read the Data List.


      1. Powertrain > Engine > Data List
        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 the engine): Value from transmission revolution sensor (NT) equal to engine speed

        • Lock-up off (idling with shift lever in N): Value from transmission revolution sensor (NT) nearly equal to engine speed

        		 Data is displayed in increments of 50 rpm
        NT Sensor Voltage Transmission revolution sensor (NT) output voltage

        Min.: 0.000 V

        Max.: 4.999 V

        		 0.1 to 1.9 V: Engine idling -




      1. Powertrain > Engine > Data List
        Tester Display
        SPD (NT)
        NT Sensor Voltage





      Result
      Result Proceed to
      Data display is not within Normal Condition range A
      Data display is within Normal Condition range B

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    INSPECT TRANSMISSION REVOLUTION SENSOR (NT)


    1. Remove the transmission revolution sensor (NT).

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    2. B0024XIC12
      *1 Transmission Revolution Sensor (NT) *2 Ammeter
      *3 Battery *4 Magnet
      *a 5 mm (0.197 in.) or less - -

      Connect the battery to the sensor as shown in the illustration.

    3. Wave a magnetic object left and right in front of the transmission revolution sensor (NT) tip (5 mm (0.197 in.) or less) to change the high/low signals while measuring the current.

      Note:

      Make sure to wave the magnetic object during the inspection. The current will not change without waving the magnetic object as indicated by the arrow in the illustration.

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

      Standard Current
      Tester Connection Condition Specified Condition
      1 (NTO) - 2 (NTB) Low signal 4 to 8 mA
      1 (NTO) - 2 (NTB) High signal 12 to 16 mA
      Result
      Proceed to
      OK
      NG

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


    1. Disconnect the C1 transmission revolution sensor (NT) connector.

    2. Disconnect the C59 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C1-2 (NTB) - C59-12 (NTB) Always Below 1 Ω
      C1-1 (NTO) - C59-13 (NTO) Always Below 1 Ω
      C1-2 (NTB) - Body ground Always 10 kΩ or higher
      C1-1 (NTO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE ECMClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR