14, Speed Comparison N2 With N3 Implausible

P0715

NOTE:
- The speed sensors are housed in the electrical part of the hydraulic control unit.
- If a speed sensor is faulty, the complete electrical part of the hydraulic control unit must be replaced.

14, Speed comparison n2 with n3 implausible
This checks if the n2 sensor signal appears plausible compared with the n3 sensor signal. An error is detected if the speeds do not agree.

Diagnostic conditions
- Ignition on
- Engine speed [>] 450 min-1
- Vehicle speed [>] 30 km/h (18.75 mph)
- Straight ahead at constant speed
- No gearshift active

Possible cause of fault
- Short circuit to B+/ground/between wires or open circuit
- Speed sensor n2 or n3 faulty
- Tiptronic control unit faulty

Affected pins
Plug A: Pin 12 and pin 35
Plug A: Pin 13 and pin 33

Diagnosis/troubleshooting