Air-Actuated Uncoupling
A dash-mounted kingpin release switch (if so equipped) may be used to uncouple the trailer. See Fig..
Fig. 1, Kingpin Release Switch
Note: In the event of an air system failure, air-actuated kingpins can be manually released following the instructions for manual uncoupling. If there is an issue, see Fig. should appear on the driver’s display screen.
Fig. 2, Kingpin Release Not Confirmed Popup, ICUC
Warning: Once the kingpin release switch has been pushed, the kingpin lock is released. The vehicle MUST NOT be driven with the trailer until the trailer has been uncoupled and coupled again. Failure to do so may result in separation of the trailer from the tractor, possibly causing serious personal injury or death.