Exterior Lighting - System Operation and Component Description: DRL
System Diagram
| Item | Description |
|---|---|
| 1 | BCM |
| 2 | Headlamp switch |
| 3 | HS-CAN1 |
| 4 | Start/Stop switch |
| 5 | PCM |
| 6 | LIN |
| 7 | LH DRL/supplemental parking lamp |
| 8 | Adaptive front lighting module |
| 9 | LH headlamp |
| 10 | Adaptive front lighting module |
| 11 | RH headlamp |
| 12 | RH DRL/supplemental parking lamp |
Network Message Chart
BCM Network Input Messages
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Gear position | PCM | Indicates the GSM request to the BCM. When the GSM has selected any position other than park, the BCM activates the DRL. |
DRL
The DRL/supplemental parking lamps are mounted in the front fascia, below the headlamps.
When the vehicle is in ON, the BCM supplies voltage to the LED control module attached to each headlamp assembly. This LED control module is used to control the DRL/supplemental parking lamp Light Emitting Diodes (LEDs).
For North America only, The front fascia mounted DRL/supplemental parking lamps operate at a reduced intensity when the parking lamps are activated.
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 PCM sends a message over the HS-CAN1 to the BCM indicating the transmission is not in PARK.
Autolamps
System Diagram
| Item | Description |
|---|---|
| 1 | BCM |
| 2 | Headlamp switch |
| 3 | Light sensor |
| 4 | Low beams |
| 5 | Start/Stop switch |
| 6 | SCCM |
| 7 | GWM |
| 8 | HS-CAN1 |
| 9 | HS-CAN2 |
| 10 | Wiper/Washer switch |
| 11 | Parking lamps |
Network Message Chart
BCM Network Input Messages
| Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
| Front wiper status | SCCM | The BCM uses the wiper status information for the operation of the wiper activated headlamps feature. |