DTC P0722: Output Speed Sensor Circuit No Signal [08/2015 - 08/2017]: Description

WARNING: This page is about a different variant/trim than selected.

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 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 Code	DTC Detection Condition	Trouble Area
P0722	All conditions below are detected 5 seconds or more continuously (2-trip detection logic) (a) No signal from speed sensor SP2 is input to ECM (b) Vehicle speed is 9 km/h (5.59 mph) or more (c) Park/neutral position switch is OFF	Open or short in speed sensor SP2 circuit Speed sensor SP2 ECM Automatic transmission (clutch, brake or gear, etc.)

Inspect using an oscilloscope:

Check the waveform of the ECM connector.

Fig 1: Waveform 2

Standard

Refer to the illustration.

Item	Content
Terminal No. (Symbol)	D56-101 (SP2+) - D56-100 (SP2-)
Tool setting	2 V/DIV., 20 msec./DIV
Condition	Vehicle speed 20 km/h (12 mph)