P0722

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. 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.








1. Reference: Inspect using an oscilloscope. Check the waveform of the ECM connector.
Standard voltage: Refer to illustration.

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 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.

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Wiring Diagram:

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.

NOTICE: In the table, 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 CAN VIM. Then connect the CAN VIM to the DLC3.
4. Turn the ignition switch ON.
5. Turn the intelligent tester ON.
6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST





7. Follow the instructions on the tester and read the DATA LIST

HINT:
^ SPD (SP2) is always 0 while driving: Open or short in the sensor or circuit.
^ 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.

INSPECTION PROCEDURES

Steps 1-3:

Step 3(continued):