CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0717, P07BF, P07C0

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

DESCRIPTION

The ECM receives a signal from the 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 a signal to the ECM.

DTC Code

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
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 assembly.

  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
P07BF

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

  2. The transmission revolution sensor (NT) output voltage is below 0.1 V.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))

  • ECM
P07C0

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

  2. The transmission revolution sensor (NT) output voltage is 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

MONITOR DESCRIPTION

The transmission revolution sensor (NT) detects the transaxle input shaft speed. The ECM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input shaft speed) with the transmission revolution sensor (NOUT) (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 determine that the transmission revolution sensor (NT) is malfunctioning. The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A0054OEE15
*a Transmission Revolution Sensor (NT)
*b Continuously Variable Transaxle Assembly (Transmission Wire)

CAUTION / NOTICE / HINT

Note


  • Perform initialization when parts related to the continuously variable transaxle are replaced Click here.

  • Check that no DTCs are stored after performing initialization Click here.

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 / Primary.

    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 or R

      		 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

      		 0.1 to 1.9 V: Engine idling (Vehicle stopped with shift lever in P or N) -
      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. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. Disconnect the B52 transmission wire connector.

    2. Disconnect the B53 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B52-8 (NTO) - B53-125 (NTO) Always Below 1 Ω
      B52-2 (NTB) - B53-126 (NTB) Always Below 1 Ω
      B53-59 (E1) - Body ground Always Below 1 Ω
      B52-8 (NTO) or B53-125 (NTO) - Body ground and other terminals Always 10 kΩ or higher
      B52-2 (NTB) or B53-126 (NTB) - Body ground and other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

    OK

  3. CHECK ECM


    1. A00540NE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the transmission wire connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B52-2 (NTB) - Body ground Ignition switch ON 11 to 14 V

    4. Turn the ignition switch off.

    5. A0053XOE02
      Text in Illustration
      *a

      Component without harness connected

      (ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B53-125 (NTO) - B53-59 (E1) Always 99 to 101 Ω

    NG

    REPLACE ECM Click here

    OK

  4. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY


    1. Replace the continuously variable transaxle assembly Click here.


    NEXT

    PERFORM INITIALIZATION Click here

  5. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    PERFORM INITIALIZATION Click here

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    PERFORM INITIALIZATION Click here