P0722

Diagnostic Chart:

Schematic:

The output speed sensor (OSS) is a 2-wire hall-effect speed sensor. The OSS uses the machined notches on the parking gear to produce different squarewave voltage signals. The OSS changes the signal on circuit 401 voltage to different frequencies depending on velocity of the output shaft. The OSS signal is sent to the transaxle control module (TCM), which is used to determine output shaft RPM. DTC P0722 sets when the TCM does not detect an OSS signal when other speed signals register vehicle movement.

DTC PARAMETERS
DTC P0722 will set if no OSS signal is detected when:
^ A forward gear is selected
^ Trans. Fluid Temp. is greater than 20°C (68°F)
^ Trans Protection Mode is Off
^ Ignition voltage is between 9 and 16 volts
^ TCM detects at least 12 pulses from the input shaft speed sensor
^ Condition exists for 10 seconds

DTC P0722 diagnostic runs continuously when the above conditions have been met.

The TCM will command Trans. Protection Mode ON if this DTC is active.

DTC P0722 is a type A DTC.

DIAGNOSTIC AIDS
To locate an intermittent problem, use a Scan tool to monitor TRANSMISSION OSS with the engine running. Wiggling wires while watching for a change in TRANSMISSION OSS may locate the area where an open or high resistance may lie.

Check the OSS mounting bolt for tightness.

Check shift solenoid 2 for a stuck closed or restricted condition. If shift solenoid 2 is plugged or stuck closed, DTC P0722 may set when idling in Drive.

ISS resistance: Open