ABS 5.4

DTC C1390 Wheel Sensor. Wrong Number of Teeth






Fault symptoms
ABS warning lamp on. ABS not functioning.

Conditions
The respective wheel speed value is compared with a reference value (the filtered mean of the speed of all four wheels).
^ Speed of one wheel >25% higher than the reference speed for 20 s.
^ Speed of two wheels >6% higher than the reference speed for 80 s.
^ Speed of one wheel <6% lower than the reference speed over 20 s. Alternatively, speed of two wheels lower over 10s.
^ ABS modulation continuous for more than 60 s.

Diagnostic help
^ The respective wheel speed sensor signal can be read using the diagnostic tool.
- Select "Read Values".
- Select "Wheel speed".
The current wheel speed in km/h is displayed.