CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, 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 and reverse clutch pressure.

The transmission revolution sensor (NT) detects the continuously variable transaxle input shaft (primary pulley) 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. 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

  • Wire harness or connector

  • Continuously variable transaxle assembly

    (Transmission revolution sensor (NT))

  • ECM
P0717

  1. When all of the following conditions are met:


    • With the shift lever in D, the output shaft speed is 300 rpm or more (vehicle speed is approximately 7 km/h (4 mph) or more) and the transmission revolution sensor (NOUT) speed is 1100 rpm or more.

    • Shift solenoid valve SC is OFF or shift solenoid valve SL is ON.

    • No abnormalities are detected in the transmission select switch, transmission revolution sensor (NT), and shift solenoid valves SC, SL, SLP and SLS.

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

  3. 2 seconds

  4. 1 trip detection logic

  • Wire harness or connector

  • Continuously variable transaxle assembly

    (Transmission revolution sensor (NT))

  • ECM

MONITOR DESCRIPTION

The turbine speed sensor (transmission revolution sensor (NT)) 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.

WIRING DIAGRAM

A005J70E08
*a Transmission Revolution Sensor (NT)
*b Continuously Variable Transaxle Assembly (Transmission Wire)

PROCEDURE


  1. 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.

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

      Input turbine speed/

      min.: 0 rpm

      max.: 12750 rpm

      • Input turbine speed (NT) equal to engine speed(NE): Lock-up ON (After warming up engine)

      • Input turbine speed (NT) nearly equal to engine speed(NE): Lock-up OFF (Idling with shift lever in P or N)

      • 0 rpm: Vehicle stopped with shift lever in D

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

      Input turbine speed (NT) sensor output voltage/

      min.: 0.000 V

      max.: 4.999 V

      		 0.6 to 1.5 V: Engine idling (Vehicle stopped with shift lever in P or N) -
      Result
      Result Proceed to
      Data displayed is not within Normal Condition range A
      Data displayed is within Normal Condition range B

    B

    REPLACE ECM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. Disconnect the transmission wire connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      B86-8 (NTO) - B23-125 (NTO) Always Below 1 Ω
      B86-2 (NTB) - B23-126 (NTB) Always Below 1 Ω
      B23-16 (E1) - Body ground Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      B86-8 (NTO) or B23-125 (NTO) - Body ground and other terminals Always 10 kΩ or higher
      B86-2 (NTB) or B23-126 (NTB) - Body ground and other terminals Always 10 kΩ or higher

    4. Connect the ECM connector.

    5. Connect the transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK ECM (CIRCUIT INSPECTION)


    1. A005I4BE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to transmission wire)

      Disconnect the transmission wire connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B86-2 (NTB) - Body ground Ignition switch ON 11 to 14 V

    3. Connect the transmission wire connector.

    4. A005GLQE02
      Text in Illustration
      *a

      Component without harness connected

      (ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B23-125 (NTO) - B23-16 (E1) Always 99 to 101 Ω

    6. Connect the ECM connector.


    NG

    REPLACE ECM Click here

    OK

  4. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY


    1. Replace the continuously variable transaxle assembly Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned value of the deceleration sensor (deceleration sensor zero point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, deceleration sensor zero 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

      • Brake actuator assembly (Skid control ECU)

      • Oil pressure sensor

      • Deceleration sensor

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

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

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


    1. Using the GTS, perform the reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration Click here.

    2. Check for DTCs again Click here.


    NEXT

    END

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  7. PERFORM INITIALIZATION

    Note


    • Performing reset memory/initialization will clear the learned value of the deceleration sensor (deceleration sensor zero point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, deceleration sensor zero 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

      • Brake actuator assembly (Skid control ECU)

      • Oil pressure sensor

      • Deceleration sensor

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

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

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


    1. Using the GTS, perform the reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration Click here.

    2. Check for DTCs again Click here.


    NEXT

    END