AUTOMATIC TRANSMISSION SYSTEM (for 1KD-FTV), Diagnostic DTC:P0722

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 TCM. The TCM 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 TCM. 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 TCM based on the signals from this vehicle speed sensor and the throttle position sensor signal.

DTC Code DTC Detection Condition Trouble Area
P0722

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

(a) No signal from speed sensor SP2 is input to the TCM 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 not in neutral.

  • Open or short in speed sensor SP2 circuit

  • Speed sensor SP2

  • TCM

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

Reference: Inspect using an oscilloscope.

Check the waveform of the TCM connector.

Standard
Terminal No. (Symbol) Tool Setting Condition Specified Condition
G69-30 (SP2+) - G69-29 (SP2-) 2 V/DIV., 20 msec./DIV. Vehicle speed 20 km/h (12 mph) Refer to illustration
A01DTDCE01

MONITOR DESCRIPTION

The output speed sensor SP2 monitors the output shaft speed. The TCM 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 TCM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, it will conclude that there is a malfunction of the output speed sensor SP2. The TCM will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A01DRPJE79

INSPECTION PROCEDURE


  1. DATA LIST

    Tech Tips

    Using the intelligent tester 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 intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the intelligent tester on.

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

    7. According to the display on the intelligent tester, read the Data List.

      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)

      		 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 intelligent tester 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. A01DU4QE01
      Text in Illustration
      *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.

    NG

    SECURELY INSTALL OR REPLACE SPEED SENSOR SP2 Click here

    OK

  2. INSPECT SPEED SENSOR SP2


    1. A01DUIZE06
      Text in Illustration
      *a

      Component without harness connected

      (Speed Sensor SP2)

      Disconnect the C31 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

    NG

    REPLACE SPEED SENSOR SP2 Click here

    OK

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


    1. A01DQ7JE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the G69 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G69-30 (SP2+) - G69-29 (SP2-) 20°C (68°F) 560 to 680 Ω
      G69-30 (SP2+) - Body ground Always 10 kΩ or higher
      G69-29 (SP2-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TCM Click here