P0722

No Output Speed Signal





Fault Symptoms
CHECK GEARBOX warning lamp on.

TCM in Limp-Home mode.

Conditions
No signal from the output speed sensor when:

- Car speed is higher than 4 km/h.

- Gear selector position sensor in position D, 3, 2 or 1.

- The transmission fluid temperature is above 20°C.

Diagnostic Help
A reading of the output speed can be obtained with the diagnostic instrument.

- Select Vehicle Speed (Output RPM).

Compare the diagnostic instrument reading with the speedometer when driving the car.

Check The Wiring
Jiggle the wiring harness at several points and in different directions to reveal intermittent breaks and short circuits in the various leads. Observe the multimeter, test lamp or diagnostic instrument while carrying out this check.