Dtc P0722 Output Speed Sensor Circuit No Signal


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT SPEED SENSOR (INSTALLATION)

INSPECT SPEED SENSOR (SP2)

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

DTC P0722 Output Speed Sensor Circuit No Signal


DESCRIPTION

The speed sensor (SP2) detects the rotation speed of the transmission output shaft and sends a signal to the ECM. The ECM determines the vehicle speed based on this signal. 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.

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal


DTC Code
DTC Detection Condition
Trouble Area
P0722
  1. All conditions below are detected 500 times or more continuously (1 trip detection logic):
    1. ECM does not receive signal from speed sensor (SP2) while vehicle speed of 9 km/h (6 mph) or more is detected by No. 1 vehicle speed sensor (SP1)
    2. Vehicle speed is 9 km/h (5.6 mph) or more for at least 4 sec.
    3. Park/Neutral position switch is OFF
  1. Open or short in speed sensor (SP2) circuit
  2. Speed sensor (SP2)
  3. ECM
  4. Automatic transmission (clutch, brake, gear, etc.)

MONITOR DESCRIPTION

The 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 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, 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


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal


INSPECTION PROCEDURE

HINT:
Using the intelligent tester's Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.
  1. Warm up the engine.
  2. Turn the ignition switch OFF.
  3. Connect the intelligent tester to the DLC3.
  4. Turn the ignition switch ON and push the tester main switch ON.
  5. Enter the following menus: Powertrain / Engine and ECT / Data List.
  6. Follow the instructions on the tester and read the 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 is equal to vehicle speed)
-
CAUTION:
In the table above, 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.
HINT:
  1. SPD (SP2) is always 0 while driving:
    Open or short in the sensor or circuit.
  2. SPD (SP2) value displayed on the tester is much lower than the actual vehicle speed:
    Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
1.INSPECT SPEED SENSOR (INSTALLATION)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Check the speed sensor (SP2) installation.

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


NG
SECURELY INSTALL SPEED SENSOR OR REPLACE SPEED SENSOR
OK


2.INSPECT SPEED SENSOR (SP2)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Disconnect the T28 sensor connector from the transmission.



  1. Measure the resistance of the sensor.

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

    HINT:
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal
    Reference: Inspect using an oscilloscope.
    Check the waveform of the ECM connector.
    OK:
    Refer to illustration
    Item
    		Content
    Tester Connection
    		E16-34 (SP2+) - E16-26 (SP2-)
    Tool Setting
    		2 V/DIV, 2 msec./DIV
    Condition
    		Vehicle speed 20 km/h (12 mph)


NG
REPLACE SPEED SENSOR (SP2)
OK


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


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Disconnect the E16 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E16-34 (SP2+) - E16-26 (SP2-)
    		20°C (68°F)
    		560 to 680 Ω
    E16-34 (SP2+) - Body ground
    		Always
    		10 kΩ or higher
    E16-26 (SP2-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM