Pulse Gear

Pulse-Gear Fault

Possible cause(s) of fault:
- A pulse gear with an incorrect teeth number has been fitted
- One or more teeth have corroded
- Teeth have been joined by corrosion residues
- A wheel bearing is defective

Storage condition(s):
- If the detected speed of a wheel deviates considerably (at least 6 km/h). The fault is not set immediately, as the control module attempts to compensate for speed deviations caused by different tire pressures.

Troubleshooting procedure:
- Visual inspection as to whether one of the above error causes applies. On some models, this is not possible due to the design.
- Check of the signal level of the wheel speed sensor with the oscilloscope. If a wheel is turned with even speed, missing or defective teeth can be detected on the oscilloscope.

NOTE: Manufacturing tolerances and tire pressure differences cannot cause this fault