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

DTC Code DTC Name
P0722 Output Speed Sensor Circuit No Signal

DESCRIPTION

The No. 2 vehicle 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.

AC voltage is generated in the No. 2 vehicle speed sensor (SP2) coil as the rotor mounted on the output shaft rotates, and this voltage is sent to the TCM.

The gear shift point and lock-up timing are controlled by the TCM based on the signals from the output speed sensor and throttle position sensor.

DTC No. DTC Detection Condition Trouble Area
P0722

  • All conditions below are detected 500 times or more continuously (2 trip detection logic):


    1. No signal from No. 2 vehicle speed sensor (SP2) is input to TCM while 4 pulses of No. 1 vehicle speed sensor signal are sent

    2. Vehicle speed is 9 km/h (6 mph) or more for at least 4 sec.

    3. PNP switch is OFF

  • Open or short in No. 2 vehicle speed sensor (SP2) circuit

  • No. 2 vehicle speed sensor (SP2)

  • TCM

MONITOR DESCRIPTION

The output speed sensor (SP2) monitors the output shaft speed. The TCM controls the gear shift point and the 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 speed sensor (SP2) even while the vehicle is moving, the TCM will conclude that the output shaft speed sensor (SP2) is malfunctioning. The TCM will illuminate the MIL and set the DTC.

WIRING DIAGRAM

A01E06XE06

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SPEED SENSOR (INSTALLATION)


    1. A01DY4HE15

      Check the speed sensor installation.

      OK
      Installation bolt is tightened properly and there is no clearance between sensor and transmission case.

    NG

    SECURELY INSTALL SPEED SENSOR OR REPLACE SPEED SENSOR

    OK

  2. INSPECT NO. 2 VEHICLE SPEED SENSOR


    1. A01E0OTE08

      Disconnect the T7 sensor connector from the transmission.

    2. Measure the resistance of the sensor.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 560 to 680 Ω

      Tech Tips

      Reference: Inspect using an oscilloscope.

      A01DX0SE01

      Check the waveform of the TCM connector.

      OK
      Refer to illustration.
      Item Content
      Tester Connection T19-30 (SP2+) - T19-29 (SP2-)
      Tool Setting 2 V/DIV., 2 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)

    NG

    REPLACE NO. 2 VEHICLE SPEED SENSOR

    OK

  3. CHECK WIRE HARNESS (NO. 2 VEHICLE SPEED SENSOR - TCM)


    1. A01DWWJE03

      Disconnect the T19 TCM connector.

    2. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      T19-30 (SP2+) - T19-29 (SP2-) 20°C (68°F) 560 to 680 Ω
      T19-30 (SP2+) - Body ground 20°C (68°F) 10 kΩ or higher
      T19-29 (SP2-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE TCM