AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0722/61

DTC Code DTC Name
P0722/61 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.

AC voltage is generated in the speed sensor (SP2) coil as the rotor mounted on the output shaft rotates, and this voltage is sent to the ECM.

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

DTC Code DTC Detection Condition Trouble Area
P0722/61

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


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

    2. Vehicle speed is 9 km/h (5.6 mph) or more for at least 4 sec.

    3. Park/neutral position switch is OFF

  • Open or short in speed sensor (SP2) circuit

  • Speed sensor (SP2)

  • ECM

MONITOR DESCRIPTION

The output speed sensor (SP2) monitors the output shaft speed. The ECM 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 ECM detects no signal from the output speed sensor (SP2) even while the vehicle is moving, the ECM will conclude that the output shaft speed sensor (SP2) is malfunctioning. The ECM will illuminate the MIL and set the DTC.

WIRING DIAGRAM

A01E1PZE15

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SPEED SENSOR (SP2) (INSTALLATION)


    1. A01DXYRE02

      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 SPEED SENSOR (SP2)


    1. A01DYJ3E04

      Disconnect the T7 sensor connector from the transmission.

    2. A01E0VJE01

      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.

      A01E2IFE02

      Check the waveform of the ECM connector.

      OK
      Refer to illustration
      Item Content
      Tester Connection E11-35 (SP2+) - E11-27 (SP2-)
      Tool Setting 2 V/DIV., 2 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)

    NG

    REPLACE SPEED SENSOR

    OK

  3. CHECK WIRE HARNESS (SPEED SENSOR (SP2) - ECM)


    1. A01DZE2E02

      Disconnect the E11 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E11-35 (SP2+) - E11-27 (SP2-) 20°C (68°F) 560 to 680 Ω
      E11-35 (SP2+) - Body ground 20°C (68°F) 10 kΩ or higher
      E11-27 (SP2-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM