Dtc P0722 Output Speed Sensor Circuit No Signal

Drivetrain. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
A343F Automatic Transmission Transaxle. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT SPEED SENSOR SP2 INSTALLATION

INSPECT SPEED SENSOR SP2

CHECK HARNESS AND CONNECTOR (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 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 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 Code
DTC Detection Condition
Trouble Area
P0722
  1. 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 (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.)
Reference: Inspect using an oscilloscope.
Check the waveform of the ECM connector.
Standard:
Terminal No. (Symbol)
Tool Setting
Condition
Specified Condition
C97-2 (SP2+) - C97-9 (SP2-)
2 V/DIV., 20 msec./DIV.
Vehicle speed 20 km/h (12 mph)
Refer to illustration
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

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 speed sensor SP2 even while the vehicle is moving, it will conclude that there is a malfunction of the output speed sensor SP2. The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal


INSPECTION PROCEDURE


DATA LIST
HINT:
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.
NOTICE:
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 / Engine and ECT / Data List.

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

    Engine and 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)
    		-
    HINT:
    1. SPD (SP2) is always 0 while driving:
      Open or short in the sensor or circuit.
    2. The SPD (SP2) value displayed on the intelligent tester is much less than the actual vehicle speed:
      Sensor trouble, improper installation, or intermittent connection trouble in the circuit.
1.INSPECT SPEED SENSOR SP2 INSTALLATION


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Check the speed sensor SP2 installation.

    OK:
    The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
    Text in Illustration
    *a
    		CORRECT
    *b
    		INCORRECT


NG
SECURELY INSTALL OR REPLACE SPEED SENSOR SP2 (HILUX_TGN26 RM0000010N501SX_01_0002.html)
OK


2.INSPECT SPEED SENSOR SP2


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Disconnect the C13 speed sensor connector.

  1. 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
    Text in Illustration
    *a
    		Component without harness connected
    (Speed Sensor SP2)


NG
REPLACE SPEED SENSOR SP2 (HILUX_TGN26 RM0000010N501SX_01_0002.html)
OK


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


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.A343F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P0722 Output Speed Sensor Circuit No Signal

  1. Disconnect the C97 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C97-2 (SP2+) - C97-9 (SP2-)
    		20°C (68°F)
    		560 to 680 Ω
    C97-2 (SP2+) - Body ground
    		Always
    		10 kΩ or higher
    C97-9 (SP2-) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to ECM)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)