СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ (для моделей с 1GD-FTV), Diagnostic DTC:P0720, P0722

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

DESCRIPTION

This sensor detects the rotation speed of the transmission output shaft and sends signals to the ECM. By comparing the input turbine speed signal (NT) with the output shaft speed sensor signal (SP2), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. As a result, the gears shift smoothly.

DTC Code DTC Detection Condition Trouble Area
P0720 When the transmission revolution sensor (SP2) input voltage is either higher than 1.9 V or below 0.1 V for 4.5 seconds or more (2 trip detection logic).

  • Open or short in transmission revolution sensor (SP2) circuit

  • Transmission revolution sensor (SP2)

  • ECM
P0722

All conditions are met for 5 seconds or more (2 trip detection logic):

(a) Park/neutral position switch D input signal is ON.

(b) Either condition is met.


  • Gear position is 1st:

    Transmission revolution sensor (NT) value is more than 1240 rpm.

  • Gear position is 2nd, 3rd, 4th, 5th or 6th:

    Transmission revolution sensor (NT) value is more than 720 rpm.

(c) The vehicle speed is 9 km/h (5.6 mph) or more.

(d) No signal from transmission revolution sensor (SP2) is input to the ECM.

  • Open or short in transmission revolution sensor (SP2) circuit

  • Transmission revolution sensor (SP2)

  • ECM

MONITOR DESCRIPTION

The transmission revolution sensor (SP2) detects the transmission output shaft speed. The ECM calculates gear shifts comparing the transmission revolution sensor (NT) with the transmission revolution sensor (SP2).

If the ECM detects no signal from the transmission revolution sensor (SP2) even while the vehicle is moving, it will conclude that there is a malfunction in the transmission revolution sensor (SP2). The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A003FHPE33

INSPECTION PROCEDURE

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced Click here.

Tech Tips

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


  1. Perform the D Position Shift Test in Road Test Click here.*1

  2. Turn the ignition switch off.

  3. Perform step (*1) again.

  4. Check for DTCs again Click here.


  1. DATA LIST

    Tech Tips

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List.

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

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      SPD (SP2)

      Output shaft speed/

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 0 km/h (0 mph): Vehicle stopped (equal to vehicle speed) -

      Tech Tips


      • SPD (SP2) is always 0 while driving: Open or short in the sensor or circuit.

      • SPD (SP2) value displayed on the GTS is much lower than the actual vehicle speed: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

PROCEDURE


  1. READ VALUE USING GTS (SPD (SP2) AND SP2 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 (SP2)

      Output shaft speed/

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 0 km/h (0 mph): Vehicle stopped (equal to vehicle speed) -
      SP2 Sensor Voltage

      Transmission revolution sensor (SP2) output voltage/

      Min.: 0.000 V

      Max.: 4.999 V

      		 0.1 to 1.9 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 (SP2)


    1. Remove the transmission revolution sensor (SP2) Click here.

    2. Connect the battery to the sensor as shown in the illustration.

      A003GNLE03
      Text in Illustration
      *1 Transmission Revolution Sensor (SP2) *2 Ammeter
      *3 Battery *4 Magnet
      *a 5 mm (0.197 in.) or less - -

    3. Wave a magnetic object left and right in front of the transmission revolution sensor (SP2) tip (5 mm (0.197 in.) or less) to change the high/low signals while measuring the current.

      Note

      Make sure to wave the magnetic object during the inspection. The 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 (SP2O) - 2 (SP2B) Low signal 4 to 8 mA
      1 (SP2O) - 2 (SP2B) High signal 12 to 16 mA

    NG

    REPLACE TRANSMISSION REVOLUTION SENSOR (SP2) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (SP2) - ECM)


    1. Disconnect the D125 transmission revolution sensor (SP2) connector.

    2. Disconnect the D134 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D125-2 (SP2B) - D134-43 (SP2B) Always Below 1 Ω
      D125-1 (SP2O) - D134-44 (SP2O) Always Below 1 Ω
      D125-2 (SP2B) - Body ground Always 10 kΩ or higher
      D125-1 (SP2O) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here