Adaptive cruise control (ACC) faults in Kenworth trucks can be a significant issue, potentially disabling other truck functions, including regeneration. This can lead to costly roadside repairs and downtime. While more common in newer trucks under warranty, as these vehicles age, fleets and independent service centers will encounter this problem more frequently.
This article outlines the common cause of these faults and a simple solution. Unlike automotive cruise control, Kenworth’s ACC system utilizes a control switch that remains active after engine startup if it was enabled before shutdown. The fault is typically triggered when the truck reaches five miles per hour or more with the ACC switch still engaged. Drivers frequently leave the switch on after stopping for breaks, increasing the likelihood of the fault occurring upon restarting.
The Easy Solution to Kenworth ACC Issues
The solution is surprisingly straightforward: turn off the adaptive cruise control switch before the truck reaches five miles per hour. This simple action prevents the fault from triggering.
For technicians, it’s best practice to deactivate the ACC switch before moving a truck into the service bay. This prevents inadvertently triggering the fault and potentially inhibiting necessary functions during service. By adopting this preventative measure, technicians can avoid unnecessary diagnostic time and ensure a smoother workflow.
Preventing Future ACC Faults
Educating drivers about this simple procedure can significantly reduce the occurrence of ACC faults. By incorporating this step into their pre-trip routines, drivers can minimize downtime and avoid costly repairs. Fleets can implement training programs or distribute informational materials emphasizing the importance of turning off the ACC switch before starting. This proactive approach can save both time and money in the long run. Remembering this simple step—turn off the ACC switch—can prevent a major headache down the road.
