If there is an electrical or mechanical fault, the CDC damper must be checked just like a conventional damper and replaced if necessary. Gerhard Endriß, a service engineer with ZF Aftermarket, dispels possible concerns among mechanics: “Even when you have to replace CDC dampers, no additional work on the electrics is required. In order to remove the CDC dampers, you only have to disconnect the plug from the wiring harness of the proportional damper valve and reconnect it during installation.”
The CDC system is capable of performing a self-diagnosis but it only recognizes electrical faults, not mechanical malfunctions. In the case of a fault, the CDC control lamp on the dashboard lights up. To narrow down the problem, a diagnosis unit (for example, the Bosch KTS) is required. It can be used to read out and delete the error memory. Depending on the vehicle, it is also possible to compare the target/actual values in order to check the sensors of the CDC system.