Fifth wheel adjustment

Selection

Description

This function prevents the driver from driving with an unlocked fifth wheel.

If the lock is opened while driving, the driver will receive a warning indication and the vehicle speed will be reduced to 10 km/h (6 mph).

Suitable for applications such as:

  • Vehicles with adjustable fifth wheel
  • Tractors

Function

  • When the fifth wheel switch and the handbrake are activated, operator [&] will open the fifth wheel lock if the vehicle speed is lower than 1 km/h (0.6 mph).
 
  • When the function is activated, it is possible to release the handbrake and drive the vehicle to adjust the position of the fifth wheel.
 
  • When driving with the fifth wheel switch activated, the function will close the fifth wheel lock if the vehicle speed is higher than 5 km/h (3.1 mph).
 
  • If the fifth wheel switch is not deactivated while driving, the speed will not exceed 10 km/h (6 mph).
 
  • If any sensor detects that the fifth wheel is moving, the driver will receive a warning indication in the instrument cluster.
 
  • If both sensors detect that the fifth wheel is in the open position, the driver will receive a warning indication in the instrument cluster and the vehicle speed will be reduced to 10 km/h (6 mph).

Note: 
The dependence of the parking brake ensures that the vehicle is stationary when activating the function.

The speed values for conditional control must be adjusted with Scania’s programming tool for bodybuilders (SDP3), as shown in the illustration below.

Conditional output signals 1: 

  • Upper vehicle speed limit for permissible activation.
    Value set at:  1 km/h
 
  • Upper vehicle speed limit for deactivation.
    Value set at:  5 km/h
 
  • Inhibit reactivation
    Value set at: with

 

 

More information is found in the following documents:

Bodywork information in the instrument cluster, ICL
Download logic diagram for Indication and limits for remote controlled fifth wheel

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