Exterior Lighting - System Operation and Component Description: Autolamps
System Diagram
| Item | Description |
|---|---|
| 1 | BCM |
| 2 | Ignition switch |
| 3 | Headlamp switch |
| 4 | Light sensor |
| 5 | Low beams |
| 6 | Start/Stop switch |
| 7 | (without push button start) |
| 8 | (with push button start) |
| 9 | SCCM |
| 10 | GWM |
| 11 | HS-CAN1 |
| 12 | Wiper/Washer switch |
| 13 | HS-CAN2 |
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. |
Autolamps
The BCM monitors the light sensor with a voltage signal. The light sensor input to the BCM varies with the ambient light conditions.
The BCM monitors the headlamp switch circuits to indicate the headlamp switch position.
When the BCM receives a headlamp switch status indicating a request for the autolamps, the BCM monitors the light sensor for the ambient light condition. If the BCM determines the ambient light level is dark, the BCM supplies voltage to the exterior lamps.
Headlamps On With Wipers On Function
When the headlamp switch is in the autolamps position, the exterior lamps turn on when the front wipers are in low or high. This feature does not activate the exterior lamps during a mist wipe, while the wipers are on to clear washer fluid during a wash condition or if the wipers are in automatic or intermittent modes.
The exterior lamps turn off when the ignition switches OFF or to ON mode, the headlamp switch is placed in the off position, or the front wipers are turned off. The exception to this is when the exterior lights are on because of darkness determined by the autolamp system.
Stoplamps
System Diagram
| Item | Description |
|---|---|
| 1 | BCM |
| 2 | LH rear lamp assembly |
| 3 | RH rear lamp assembly |
| 4 | Stoplamp switch |
| 5 | High mounted stoplamp |
| 6 | (without push button start) |
| 7 | Ignition switch |
| 8 | Start/Stop switch |
| 9 | (with push button start) |