New Freightliner Cascadia, adding a day time running light or low speed interrupt switch

Applicable Vehicles:

This solution applies to all New Cascadia Vehicles.

Issue:

The Customer Assistance Center (CAC) has received several requests pertaining to Daytime Running Lights (DRL) operation. In most cases, the request is to add low speed DRL interrupt. Currently (4/16/2019), Canada-domiciled vehicles require continuous DRL and regulation prohibits DRL interruption at any speed. For U.S.-domiciled vehicles, DRL are not required by regulation but all New Cascadia vehicles come standard with DRL. U.S.-domiciled New Cascadia vehicles may be deployed in applications (ex. fuel tankers) where local circumstances (ex. fuel island safety rules) require the ability to interrupt DRL (if present) under certain operating conditions.

Solution:

Since DRL comes standard on all New Cascadia vehicles, it is rare that a request is submitted to add DRL. The SSAM parameter to enable DRL is 043 447 21 58—PARM-SSAM, ELC, DRL, ENABLE. For New Cascadia vehicles requesting reconfiguration to the factory-available low speed DRL interrupt function (allows manual deactivation if vehicle speed is less than 10 mph and automatically reactivates when vehicle speed exceeds 10 mph), the following part and programming are required.

This switch and parameter reconfiguration are to be applied to only a U.S.-domiciled vehicle for which continuous DRL operation conflicts with an application-specific safety requirement unforeseen at the time the vehicle was ordered.

Part number                Description                                                                             Quantity

A06-90128-008           SW-MSF,MUX,DRL OFF (Switch ID 26)                                    1

030 447 24 58             PARM-SW,MUX,DRL OFF                                                Reference Only

The “DRL Off” switch is a manual momentary switch that will disengage DRL only if vehicle speed is below 10 mph. The DRL will remain off until being automatically reengaged once the vehicle speed is 10 MPH or greater. Overall, DRL operation automatically disengages anytime engine speed drops below 300 RPM or when the park brake is applied

 Additional Information:

Current operation for Halogen headlights uses the front turn signals for DRL. For LED headlights, DRL are activated using the light located just above the headlights (this is referred to in the driver’s manual as the Accent / Park location). It is not the same lighting as used for Accent / Park, but it is the same location. For more information about the accent light, only found on the LED headlights.

Future releases of the SSAM hardware and software will allow for more programing options for the DRL features.