P0720

Test 1 Through 3:

Test 4 Through 8:

Test 9:

Symptom:
P0720 OUTPUT SPEED SENSOR

When Monitored and Set Condition:
P0720 OUTPUT SPEED SENSOR

When Monitored:
Continuously with vehicle speed over 6 MPH (communicated over CCD Bus) and the Transmission is in a forward gear (OD, 3, or 1-2).

Set Condition:
No signal from the Output Speed Sensor (OSS) for 100 seconds.

POSSIBLE CAUSES:
OSS GROUND CIRCUIT OPEN
OUTPUT SPEED SENSOR GROUND CIRCUIT SHORTED TO GROUND
OSS SIGNAL CIRCUIT ON TCM DEFECTIVE
OSS SIGNAL SHORT TO OSS GROUND CIRCUIT
OUTPUT SPEED SENSE CIRCUIT SHORT TO GROUND
OUTPUT SPEED SENSE SIGNAL CIRCUIT OPEN
OUTPUT SPEED SENSE WIRING DAMAGED
OUTPUT SPEED SENSOR DEFECTIVE
OUTPUT SPEED SENSOR INTERNAL FAILURE