DTC P0720-31: Output Speed Sensor No Signal [10/2017 - 09/2019]: Description
The transmission revolution 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 transmission revolution 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.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P0720-31 | Output Speed Sensor No Signal | All of the following conditions are met (1-trip detection logic):
|
|
Comes on | DTC stored | SAE Code: P0722 |
| Vehicle Condition | |||||||
|---|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | Pattern 6 | ||
| Diagnostic Condition | Park/neutral position switch D input signal is ON. | ◦ | ◦ | ◦ | ◦ | ◦ | ◦ |
| Vehicle speed is 9 km/h (6 mph) or more. | ◦ | ◦ | ◦ | ◦ | ◦ | ◦ | |
| When the vehicle is being driven in 1st gear, the transmission revolution sensor (NT) value is 1080 rpm or more. | ◦ | - | - | - | - | - | |
| When the vehicle is being driven in 2nd gear, the transmission revolution sensor (NT) value is 630 rpm or more. | - | ◦ | - | - | - | - | |
| When the vehicle is being driven in 3rd gear, the transmission revolution sensor (NT) value is 430 rpm or more. | - | - | ◦ | - | - | - | |
| When the vehicle is being driven in 4th gear, the transmission revolution sensor (NT) value is 310 rpm or more. | - | - | - | ◦ | - | - | |
| When the vehicle is being driven in 5th gear, the transmission revolution sensor (NT) value is 300 rpm or more. | - | - | - | - | ◦ | - | |
| When the vehicle is being driven in 6th gear, the transmission revolution sensor (NT) value is 300 rpm or more. | - | - | - | - | - | ◦ | |
| Malfunction Condition | Transmission revolution sensor (SP2) signal is not transmitted to the ECM. | ◦ | ◦ | ◦ | ◦ | ◦ | ◦ |
| Duration | 5 seconds or more | 5 seconds or more | 5 seconds or more | 5 seconds or more | 5 seconds or more | 5 seconds or more | |
| Detection Logic | 1-trip detection logic | 1-trip detection logic | 1-trip detection logic | 1-trip detection logic | 1-trip detection logic | 1-trip detection logic | |
HINT:
This DTC is stored when any of the above detection patterns is met.