CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM(for 8NR-FTS), Diagnostic DTC:P072012, P072014, P072031

DTC Code DTC Name
P072012 Output Speed Sensor Circuit Short to Battery
P072014 Output Speed Sensor Circuit Short to Ground or Open
P072031 Output Speed Sensor No Signal

DESCRIPTION

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

The transmission revolution sensor (NOUT) detects the continuously variable transaxle output shaft (secondary pulley) speed and sends a signal to the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P072012 Output Speed Sensor Circuit Short to Battery

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


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

  2. The transmission revolution sensor (NOUT) output voltage is higher than 1.9 V.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Transmission revolution sensor (NOUT)

  • ECM

 Comes on DTC stored

SAE Code:

P077D
P072014 Output Speed Sensor Circuit Short to Ground or Open

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


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

  2. The transmission revolution sensor (NOUT) output voltage is less than 0.1 V.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Transmission revolution sensor (NOUT)

  • ECM

 Comes on DTC stored

SAE Code:

P077C
P072031 Output Speed Sensor No Signal

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The vehicle is driven with the shift lever in D, the output shaft speed is 300 rpm or more and no malfunctions of the park/neutral position switch assembly are detected.

  2. The output shaft 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

 Comes on DTC stored

SAE Code:

P0722

MONITOR DESCRIPTION

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

If the ECM detects no signal from the transmission revolution sensor (NOUT) even while the vehicle is moving, it will determine that in the transmission revolution sensor (NOUT) is malfunctioning, illuminate the MIL and store a DTC.

WIRING DIAGRAM

B00432WE11
*a Transmission Revolution Sensor (NOUT)

CAUTION / NOTICE / HINT

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Drive the vehicle for 2 seconds or more at 7 km/h (4 mph) or more with the shift lever in D.

  2. Check for DTCs again.

    Click here

PROCEDURE


  1. READ VALUE USING GTS (NOUT SENSOR SPEED 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 / Transmission / Data List.

    5. According to the display on the GTS, read the Data List.


      Powertrain > Transmission > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      NOUT Sensor Speed Secondary pulley speed (NOUT)

      Min.: 0 rpm

      Max.: 12750 rpm

      • 0 rpm: Vehicle stopped

      • Approximately 2500 rpm: Vehicle being driven at approximately 60 km/h (37 mph)

      		 Data is displayed in increments of 50 rpm.
      NOUT Sensor Voltage Transmission revolution sensor (NOUT) 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) -

      Powertrain > Transmission > Data List
      Tester Display
      NOUT Sensor Speed
      NOUT Sensor Voltage
      Result
      Result Proceed to
      Data List value is not normal A
      Data List value is normal B

    B

    REPLACE ECM Click here

    A

  2. INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)


    1. Remove the transmission revolution sensor (NOUT).

      Click here

    2. Connect the battery to the transmission revolution sensor (NOUT) as shown in the illustration.

      B0044YWC44
      *1 Battery *2 Ammeter
      *a

      Component without harness connected

      (Transmission Revolution Sensor (NOUT))

      		 *b Magnet
      *c 5 mm or less - -

    3. Wave a magnetic object left and right 5 mm (0.197 in.) or less from the tip of the transmission revolution sensor (NOUT) to output a high/low signal while measuring the current.

      Note

      Make sure to wave the magnetic object during the inspection. The current will not change unless the magnetic object is moved as shown in the illustration.

    4. Measure the current according to the value(s) in the table below.

      Standard Current
      Tester Connection Condition Specified Condition
      1 (NOTO) - 2 (NOTB) Low signal 4 to 8 mA
      1 (NOTO) - 2 (NOTB) High signal 12 to 16 mA
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT) Click here

    OK

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


    1. Disconnect the B112 transmission revolution sensor (NOUT) connector.

    2. Disconnect the B208 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B112-1 (NOTO) - B208-74 (NOTO) Always Below 1 Ω
      B112-2 (NOTB) - B208-73 (NOTB) Always Below 1 Ω
      B112-1 (NOTO) or B208-74 (NOTO) - Body ground and other terminals Always 10 kΩ or higher
      B112-2 (NOTB) or B208-73 (NOTB) - Body ground and other terminals Always 10 kΩ or higher

    4. Connect the B208 ECM connector.

    5. Connect the B112 transmission revolution sensor (NOUT) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

    OK

  4. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here

  5. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here