СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0722

Информация добавлена 08-08-2017

DTC Code DTC Name
P0722 Output Speed Sensor Circuit No Signal

DESCRIPTION

The speed sensor SP2 detects the rotation speed of the transmission output shaft and sends signals to the ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the speed sensor SP2 coil as the parking gear mounted on the rear planetary gear assembly rotates, and this voltage is sent to the ECM. The parking gear on the rear planetary gear is used as the timing rotor for this sensor.

The gear shift point and lock-up timing are controlled by the ECM based on the signals from this vehicle speed sensor and the throttle position sensor signal.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0722 Output Speed Sensor Circuit No Signal

All conditions are met 500 times or more continuously (2-trip detection logic):

(a) No signal from speed sensor SP2 is input to the ECM while 4 pulses of the No. 1 vehicle speed sensor signal are sent.

(b) Vehicle speed is 9 km/h (6 mph) or more for at least 5 sec.

(c) Park/neutral position switch is OFF.

(d) Transfer is in any position except neutral.

  • Open or short in speed sensor SP2 circuit

  • Speed sensor SP2

  • ECM

  • Automatic transmission (clutch, brake, gear, etc.)

 Comes on DTC stored

MONITOR DESCRIPTION

The output speed sensor SP2 monitors the output shaft speed. The ECM controls the gear shift point and lock-up timing based on the signals from the output speed sensor SP2 and throttle position sensor.

If the ECM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, itwill conclude that there is a malfunction of the output speed sensor SP2. The ECM will illuminate the MILand store a DTC.

WIRING DIAGRAM

A01A8NOE02
*a Speed Sensor SP2

CAUTION / NOTICE / HINT


  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 engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    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.


      Powertrain > Engine and ECT > Data List
      Tester Display
      SPD (SP2)

      Powertrain > Engine and ECT > Data List
      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)

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

      Tech Tips


      • SPD (SP2) is always 0 while driving:

        Open or short in the sensor or circuit.

      • The SPD (SP2) value displayed on the GTS is much lower than the actual vehicle speed:

        Sensor trouble, improper installation or intermittent connection trouble in the circuit.

PROCEDURE


  1. INSPECT SPEED SENSOR SP2 INSTALLATION


    1. A01A445C07
      *a CORRECT
      *b INCORRECT

      Check the speed sensor SP2 installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY INSTALL OR REPLACE SPEED SENSOR SP2 Click here

    OK

  2. INSPECT SPEED SENSOR SP2


    1. A01A2JFC07
      *a

      Component without harness connected

      (Speed Sensor SP2)

      Disconnect the speed sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 560 to 680 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPEED SENSOR SP2 Click here

    OK

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


    1. Disconnect the ECM connector.

    2. A01A7NHC12
      *a

      Rear view of wire harness connector

      (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C30-9 (SP2+) - C30-10 (SP2-) 20°C (68°F) 560 to 680 Ω
      C30-9 (SP2+) - Body ground Always 10 kΩ or higher
      C30-10 (SP2-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR