A shock absorber fails?
- If there is a short-circuit or interruption of an adjustment valve, the system immediately switches to “Fail Safe”.
- The shock absorber symbol in the button flashes to indicate the fault.
- The vehicle behaves like a vehicle with conventional damping.
- If only one sensor fails, a substitute signal is calculated from the other working sensors. The system is still capable of functioning.
- If two or more sensors fail, the system will be switched off in stages. The shock absorber symbol on the button flashes at a rate of 1 Hz for 100 milliseconds.
- The control unit J250 needs to be reprogrammed via SVM (Service Versions Management).
- A basic set-up needs to be carried out (teaching the wheel travel sensors at the lower limit).
- The DCC adaptive chassis control still continues to operate.
Brake test stand:
The system obtains the wheel speed information on the brake test stand. The body acceleration cannot be calculated however.
Therefore the system always regulates in the range comfort = soft and thus assumes the road conditions are good.
Shock absorber test stand:
On a shock absorber test stand, the system receives information neither from the vehicle level senders, the body acceleration sensors nor wheel speed information.
Therefore the adaptive chassis control presumes the vehicle is stationary. The shock absorbers are not powered and can therefore be checked normally.