CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0720, P0722

DTC Code DTC Name
P0720 Output Speed Sensor Circuit
P0722 Output Speed Sensor Circuit No Signal

DESCRIPTION

The ECM receives a signal from the secondary pulley speed sensor (transmission revolution sensor (NOUT)) installed in the continuously variable transaxle and determines the output shaft speed in order to control the gear ratio.

The transmission revolution sensor (NOUT) detects the continuously variable transaxle output 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
P0720

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

  2. The transmission revolution sensor (NOUT) 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

  • Transmission revolution sensor (NOUT)

  • ECM
P0722

  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 (NT) speed is 1050 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 (NOUT), and shift solenoid valves SC, SL, SLP and SLS.

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

  3. 2 seconds

  4. 1 trip detection logic

  • Wire harness or connector

  • Transmission revolution sensor (NOUT)

  • ECM

MONITOR DESCRIPTION

The ECM receives a signal from the secondary pulley speed sensor (transmission revolution sensor (NOUT)) installed in the continuously variable transaxle and determines the output shaft speed in order to control the gear ratio.

If the ECM detects no signal from the secondary pulley speed sensor (transmission revolution sensor (NOUT)) even while the vehicle is moving, it will conclude that there is a malfunction in the secondary pulley speed sensor (transmission revolution sensor (NOUT)). The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A005GNTE45
*a Transmission Revolution Sensor (NOUT)

PROCEDURE


  1. READ VALUE USING GTS (SPD (NOUT) AND NOUT 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 (NOUT)

      Secondary pulley speed (NOUT)/

      min.: 0 rpm

      max.: 12750 rpm

      • 0 rpm: Vehicle stopped

      • Approximately 2850 rpm: Vehicle cruising at approximately 60 km/h (37 mph)

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

      Secondary pulley speed (NOUT) 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. INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)


    1. Remove the transmission revolution sensor (NOUT) Click here.

      A005KOYE01

    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 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. 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 - 2 Low signal 4 to 8 mA
      High signal 12 to 16 mA
      Text in Illustration
      *1 Ammeter
      *2 Battery
      *a

      Component without harness connected

      (Transmission Revolution Sensor (NOUT))
      *b 5 mm (0.197 in.) Gap or Closer

    5. Install the transmission revolution sensor (NOUT).


    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT) Click here

    OK

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


    1. Disconnect the transmission revolution sensor (NOUT) 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
      B47-1 - B23-129 (NOTO) Always Below 1 Ω
      B47-2 - B23-130 (NOTB) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      B47-1 or B23-129 (NOTO) - Body ground Always 10 kΩ or higher
      B47-2 or B23-130 (NOTB) - Body ground Always 10 kΩ or higher

    4. Connect the ECM connector.

    5. Connect the transmission revolution sensor (NOUT) connector.


    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 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