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CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0715, P0717

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DTC Code DTC Name
P0715 Input/Turbine Speed Sensor "A" Circuit
P0717 Input/Turbine Speed Sensor "A" Circuit No Signal
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DESCRIPTION

The ECM receives a signal from the turbine speed sensor (transmission revolution sensor (NT)) installed in the continuously variable transaxle to control the lock-up engagement pressure and forward and reverse clutch pressure.

The transmission revolution sensor (NT) detects the continuously variable transaxle input shaft speed and sends it to the ECM.

DTC Code

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0715

  1. A transmission revolution sensor (NT) signal malfunction is not detected.

  2. The transmission revolution sensor (NT) output voltage is less than 0.1 V, or higher than 1.9 V.

  3. 2 seconds

  4. 1 trip detection logic

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

  • Transmission revolution sensor (NT)

  • ECM
P0717

  1. The vehicle is driven with the shift lever in D, the output shaft speed is 300 rpm or more, and no error is detected in the park/neutral position switch.

  2. The speed indicated by the transmission revolution sensor (NT) is less than 300 rpm.

  3. 2 seconds

  4. 1 trip detection logic

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

  • Transmission revolution sensor (NT)

  • ECM
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MONITOR DESCRIPTION

The turbine speed sensor detects the transaxle input shaft speed. The ECM determines the necessary gear ratio based on a comparison of the turbine speed sensor (input shaft speed) with the output speed sensor (output shaft speed).

When the output shaft speed is higher than the expected value and the input shaft speed is less than 300 rpm while driving with the shift lever in D, the ECM will conclude that there is a malfunction in the transmission revolution sensor (NT). The ECM will illuminate the MIL and store the DTC.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (SPD (NT) AND NT SENSOR VOLTAGE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

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

      Table 1. Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SPD (NT)

      Input turbine 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 P or N): Input turbine speed (NT) nearly equal to engine speed

      • Vehicle stopped with shift lever in R: 0 rpm

      		 Data is displayed in increments of 50 rpm.
      NT Sensor Voltage

      Input turbine speed (NT) sensor output voltage/

      min.: 0 V

      max.: 5 V

      		 Engine idling (Vehicle stopped with shift lever in P or N): Constantly changes between 0.8 to 1.6 V and 2.4 to 3.2 V -
      Table 2. Result
      Result Proceed to
      Data displayed is not as specified under Normal Condition A
      Data displayed is as specified under Normal Condition B

  2. Click here

    INSPECT TRANSMISSION REVOLUTION SENSOR (NT)


    1. A01IS4CE01

      Remove the transmission revolution sensor (NT) (Click here).

    2. 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.) gap or closer) 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
      Table 3. Text in Illustration
      *1

      Component without harness connected

      (Transmission Revolution Sensor (NT))
      *2 Ammeter
      *3 Battery
      *4 5 mm (0.197 in.) Gap or Closer

  3. Click here

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


    1. A01IOQNE05

      Disconnect 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 Condition Specified Condition
      C47-1 (NTO) - C68-124 (NTO) Always Below 1 Ω
      C47-2 (NTB) - C68-123 (NTB) Always Below 1 Ω
      C47-1 (NTO) or C68-124 (NTO) - Body ground Always 10 kΩ or higher
      C47-2 (NTB) or C68-123 (NTB) - Body ground Always 10 kΩ or higher
      Table 4. Text in Illustration
      *1

      Front view of wire harness connector

      (to Transmission Revolution Sensor (NT))
      *2

      Front view of wire harness connector

      (to ECM)

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    REPLACE ECM


    1. Replace the ECM (Click here).


  5. Click here

    PERFORM INITIALIZATION

    Note:

    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Oil pressure sensor

      • Yaw rate sensor

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground (inclination: 0 +/-0.25°).

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration (Click here).

    2. Check that no DTC is stored.


  6. Click here

    END

  7. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  8. Click here

    PERFORM INITIALIZATION

    Note:

    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Oil pressure sensor

      • Yaw rate sensor

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground (inclination: 0 +/-0.25°).

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration (Click here).

    2. Check that no DTC is stored.


  9. Click here

    END

  10. Click here

    REPLACE TRANSMISSION REVOLUTION SENSOR (NT)Click here

  11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR