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. Driving at 28 km/h (17 mph) or more with shift lever in D.

  2. The speed indicated by the transmission revolution sensor NOUT is less than 1000 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 even while the vehicle is moving, it will conclude that there is a malfunction in the secondary pulley speed sensor. The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A01VIJ9E04

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (SPD (NOUT) AND NOUT 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.

      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 2800 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 V

      max.: 5 V

      		 Approximately 2 V: Engine idling -
      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 (NOUT)


    1. A01VI7YE02
      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

      Remove the transmission revolution sensor NOUT 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 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
      1 - 2 High signal 12 to 16 mA

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT) Click here

    OK

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


    1. Disconnect the ECM connector.

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      B47-1 - B22-129 (NOTO) Always Below 1 Ω
      B47-2 - B22-130 (NOTB) Always Below 1 Ω
      B47-1 or B22-129 (NOTO) - Body ground Always 10 kΩ or higher
      B47-2 or B22-101 (NOTB) - Body ground Always 10 kΩ or higher
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      B47-1 - B23-129 (NOTO) Always Below 1 Ω
      B47-2 - B23-130 (NOTB) Always Below 1 Ω
      B47-1 or B23-129 (NOTO) - Body ground Always 10 kΩ or higher
      B47-2 or B23-101 (NOTB) - 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


    1. Perform the initialization Click here.

    2. Check for DTCs again Click here.


    NEXT

    END