Exterior Lamps And Lighting: Notes

DESCRIPTION 

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The Front Exterior Lamps and Lighting system contains several different components:

1.	Refer to FRONT FOG LAMPS  .
2.	Refer to FRONT LAMP UNIT  . - Includes Turn Signal and Reflex Lamps.
3.	Refer to MIRROR TURN SIGNAL LAMPS  .
4.	Refer to REAR REFLEX LAMP / SIDE REPEATER LAMP  .

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Rear Exterior Lamps and Lighting system contains the following components:

1.	Refer to REAR REFLEX LAMP / SIDE REPEATER LAMP  .
2.	Refer to REAR TAIL LAMP ASSEMBLY  . - Two Piece Lamp - Includes Rear Turn Signal Lamps, Brake Lamps, and Reverse Lamps.
3.	Refer to CENTER HIGH MOUNTED STOP LAMP (CHMSL)  .
4.	Refer to LICENSE PLATE LAMP  .

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Exterior Lamps and Lighting Controls:

1.	Refer to SMART LIGHTING MODULES (SLM)  - There is a SLM for each headlamp assembly. Smart Lighting Module Left (SLML) and Smart Lighting Module Right (SLMR).
2.	Refer to BODY CONTROL MODULE (BCM)  .
3.	Refer to HAZARD WARNING LAMPS SWITCH  - A component of the Auxiliary Switch Bank Module (ASBM).
4.	Refer to LONG RANGE CAMERA FRONT  .
5.	Refer to HUMIDITY RAIN LIGHT SENSOR MODULE (HRLSM)  .
6.	Refer to CENTRAL ADAS DECISION MODULE (CADM)  .
7.	Refer to TRAILER TOW MODULE (TTM)  .
8.	Refer to STEERING COLUMN CONTROL MODULE  - Left Steering Column Stalk.
9.	Refer to HEADLAMP SWITCH  .
-	Refer to STOP LAMP SENSOR  - A component of the Electronic Brake Booster (EBB).

These exterior lighting lamp units and their controls are combined to provide the following exterior lighting features:

Automatic Headlamp Leveling System (AHLS)	The AHLS functions is composed of both SLMs connected to the bus network and two ride height sensors. for additional information. Refer to AUTOMATIC HEADLAMP LEVELING SYSTEM (AHLS) .
Automatic Headlamp	The automatic headlamp feature is designed to automatically turn the exterior lights ON or OFF depending on the ambient lighting conditions. The automatic headlamps feature operates when the ignition is in the RUN position, the engine RPM is greater than 450 RPM, and the headlamp switch is in the AUTO position. The BCM outputs a LIN message for the Humidly Rain Light Sensor Module (HRLSM) ACTIVE. The HLRSM acquires a vehicle speed value LIN signal to improve the system performance. When the HLRSM receives the BCM signal for light sensor active, the HLRSM will command the BCM through a LIN signal to activate the headlamps based on exterior ambient light levels detected by the HLRSM. When the BCM receives the HLRSM command to activate the lamps, the BCM will then turn on the lamps. When exterior light levels are no longer in range for auto headlamps, the HLRSM will send the command to the BCM to deactivate the headlamps.
Automatic High Beams	The automatic high beam feature is a customer programmable to either ON or OFF. This feature is available for vehicles equipped with a CADM which utilizes a hardwired signal from the Long Range Camera Front (LRCF) to monitor road conditions and ambient lighting levels to determine the appropriate times to activate or deactivate the high beam lamps. for additional information. Refer to AUTOMATIC HIGH BEAMS  .
Cornering Lamps	The Cornering Lights function comprises two algorithms, one based on the steering angle or one based on the turn signal. Both are used when the cornering lights function is active. In case a conflict arises between the two, the functionality based on the steering angle is given priority to the expense of the strategy based on the turn lights. For steering angle, the BCM looks at the actual angle to determine when to turn on the cornering lamp. The average steering able resting range is 100 degrees. The minimum angle threshold is 40 degrees or lower while the maximum is 160 degrees or higher. When the steering angle meets the minimum or maximum threshold, the cornering lamps are activated until the angle falls back within the normal range. For the turn signal strategy, the fog lamps are activated according to the status of the signal lamps. When the turn signal lamps are active, so is the respective side cornering lamp. The cornering lamps have requirements to be met before they will operate. Those requirements are: Ignition RUN state Low beam headlamps ON Steering angle sensor status is reporting that it is operational with no faults Hazard switch is OFF Vehicle wheel speed signal is valid and available to be read Vehicle wheel speed is at or below 40 km/h (25 mph) The fog lamps are not activated The transmission is not engaged in Reverse  or Park  The park brake is not engaged
Daytime Running Lamps (DRLs)	DRLs are standard equipment on vehicles manufactured for sale in Canada and optional on vehicles manufactured for the United States. Canadian vehicles illuminate the high beam filament of each headlamp bulb at a reduced intensity to serve as the DRL units. for additional information. Refer to DAYTIME RUNNING LAMPS  .
Exterior Lamp Fail-Safe Operation	The Instrument Panel Cluster (IPC) and the BCM provide a fail-safe feature which will automatically turn ON the low beam headlamps and all park lamps when the ignition position is in the ON position and there is no detected communication over the LIN or CAN data buses.
Exterior Lamp Load Shedding	The BCM provides a battery saver feature which will automatically turn OFF all exterior lamps that remain ON with the ignition position in the LOCK position after a timed interval of about eight minutes.
Headlamp Delay	The standard equipment low or high beam headlamps remain illuminated for a customer-programmable delay period of 0 (disabled), 30, 60 or 90 seconds when the headlamps are turned OFF after the ignition has been turned to the OFF position. for additional information. Refer to HEADLAMP DELAY  .
Headlamps ON with Snow (HOWS)	The HOWS feature is designed to automatically turn on the headlamps when the terrain selector is switched to Snow Mode for increased safety while driving in snowy conditions. This is not a customer programmable feature.
Headlamps ON with Wipers (HOWW)	HOWW is a feature designed to automatically turn on the headlamps when the wiper system is activated. This is a customer programmable option. HOWW is active when the option is enabled and the headlamp switch is in the AUTO position. HOWW is cancelled by rotating the headlamp switch out of the AUTO position or disabling in the customer programmable options menu.
Illuminated Approach	Illuminated approach activates the exterior lamps up to 90 seconds to help see obstacles when approaching the vehicle. This is a customer programmable feature that allows the customer to set this feature into one of four different selections: Disabled (0 seconds) Default (30 seconds) 60 seconds 90 seconds Refer to ILLUMINATED APPROACH  for additional information.
Lighting Animation	Animation is a sequence of headlamp and tail lamp illumination that is used as a welcome or departure feature when customer approach or depart the vehicle. The animation feature is customer programmable. The animation activation is generated by signals received by the BCM from the Remote Keyless Entry (RKE) fob lock/unlock/remote start requests or the Passive Entry (PE) door handle lock/unlock detection. The SLMs receive animation requests alone with other final light output requests from the BCM. The SLM will then perform the animation if conditions are met.
Optical Horn	Also known as flash-to-pass, the beam selection function of the left multifunction switch control stalk has a momentary intermediate position that allows the headlamp high beams to be flashed momentarily, without changing the headlamp beam selection.
Remote Start Lighting	Remote start lighting is a customer programmable feature. If the BCM receives a remote start request from the Radio Frequency Hub (RFH) module, the BCM activates all of the vehicle park lamps after the ignition state transitions from START to RUN. During a remote start event, the BCM will still honor an illuminated approach request.

OPERATION