System Operation - DRL: DRL

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition is in ON, the BCM sends a DRL message over the LIN circuit to the adaptive front lighting module attached to each headlamp assembly to illuminate the low beam LED front park/ DRL Light Emitting Diodes (LEDs) inside the headlamp assembly at full intensity.

The BCM monitors the ignition status, the headlamp switch and autolamp status.

There are two types of DRL, conventional (where it is required) and configurable.

When equipped with conventional DRL, the DRL are active in any headlamp switch position except the HEADLAMPS position.

The conventional DRL are activated when the following conditions are met:

the ignition is ON
the headlamps switch is in OFF, PARKLAMPS or AUTOLAMPS position and the headlamps have not been turned on by the autolamp system.
the transmission is not in PARK

When equipped with configurable DRL, the DRL may be enabled through the IPC message center. When enabled, the DRL are active only in the AUTOLAMPS headlamp position. When autolamps request the headlamps on, the DRL are de-activated.

The configurable DRL are activated when the following conditions are met:

the ignition is ON.
the headlamps switch is in AUTOLAMPS position and the headlamps have not been turned on by the autolamp system.
the transmission is not in PARK.

When the transmission is in not in PARK, the TCM sends a message over the HS-CAN1 to the BCM indicating the transmission is not in PARK.