СИСТЕМА БЕССТУПЕНЧАТОЙ ТРАНСМИССИИ, Diagnostic DTC:P0715, P0717

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

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 clutch pressure.

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

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0715

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

  2. Transmission revolution sensor (NT) input voltage is less than 0.1 V, or more than 1.9 V

  3. 2 seconds

  4. 1-trip detection logic

  • Open or short speed sensor NT circuit

  • Transmission revolution sensor (NT)

  • ECM
P0717

  1. Driving with the shift lever in D, output shaft speed of 300 rpm or more, and no error detected from the park/neutral switch

  2. Transmission revolution sensor (NT) Speed: Less than 300 rpm

  3. 2 seconds

  4. 1-trip detection logic

  • Open or short speed sensor NT circuit

  • Transmission revolution sensor (NT)

  • ECM

MONITOR DESCRIPTION

The turbine speed sensor detects the transaxle input shaft speed. The ECM determines the gear shift timing 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 running with the shift lever in the D position, the ECM will conclude that there is malfunction of the transmission revolution sensor (NT). The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A01182SE01

INSPECTION PROCEDURE

PROCEDURE


  1. 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 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.

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

      Input turbine speed/

      display: 50 rpm

      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 at P or N position):

      Input turbine speed (NT) nearly equal to engine speed
      Vehicle stopped in R position: 0 rpm
      NT Sensor Voltage

      Input speed sensor output voltage/

      min.: 0 V

      max.: 5 V

      Engine idling:

      Constantly changes between 0.8 to 1.6 V and 2.4 to 3.2 V

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

    B

    REPLACE ECM Click here

    A

  2. INSPECT TRANSMISSION REVOLUTION SENSOR (NT)


    1. Remove the transmission revolution sensor (NT) Click here and then connect the battery.

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

      A0119CXE01

      Note

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

    3. 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
      High signal 12 to 16 mA

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here

    OK

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


    1. A0118BNE01
      Text in Illustration
      *1

      Front view of wire harness connector:

      (to Transmission Revolution Sensor (NT))
      *2

      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
      Tester Connection Condition Specified Condition
      B16-1 (NTO) - B8-124 (NTO) Always Below 1 Ω
      B16-2 (NTB) - B8-123 (NTB) Always Below 1 Ω
      B8-123 (NTB) - Body ground Always 10 kΩ or higher
      B8-124 (NTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned values of both the yaw rate and acceleration sensor (deceleration sensor 0 point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate and acceleration 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 and acceleration sensor

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

    • Always perform the 0 point calibration with the vehicle on level ground.

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


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

    2. Check for DTCs again Click here.


    NEXT

    END