Headlights
The headlights are controlled using the multifunction lever on the left side of the steering column. Headlights can be turned on when the ignition switch is in the ON position (ON). If the headlight switch is on and the ignition key is in the ACC or LOCK position, the headlight will automatically turn off. Moving the headlight switch to the first position will turn on the parking lights, license plate lights, and instrument panel lights. Moving the switch to the second position will turn on all previous lights and headlights. Moving the switch to the OFF position will turn off all lights.
The headlights can be turned on in 2 different ways. Method one: when the driver sets the headlight switch to the HEADLAMP position (HEADLIGHTS) for normal operation. The second way: when the headlight switch is set to AUTO for automatic lighting control (ALC). In automatic mode, the headlights will be on in daytime running light mode (DRL) in daylight conditions and with normal headlights in low light conditions.
Turning the headlights on and off is controlled by the body controller (BCM) by applying a signal to the headlight switch input circuit when the headlight switch is in the HEAD position (HEADLIGHTS). When the headlight switch is in the AUTO position, the BCM controls the headlights on and off based on voltage from the ambient light sensor.
The same lever switches between low and high beam headlights. With the headlights on, pressing the lever away from the driver until it clicks will switch from low beam to high beam. When the high beam headlights are on, the indicator lamp on the instrument cluster assembly will illuminate. To return the low beam headlights, pull the lever towards the driver. Headlights must be adjusted to properly illuminate the road. It is necessary to check the headlight alignment when installing a new headlight assembly, as well as after carrying out repair and maintenance work on the front of the vehicle, during which the position of the headlight assembly or its fasteners may have changed.
Headlight Warning Light
The ambient light sensor is a light sensitive transistor that changes the voltage signal applied to the body controller (BCM), depending on the level of outdoor illumination. When this signal is received, the BCM either turns on the dipped beam headlights at reduced daytime running light intensity (DRL) or turns on the dipped headlights and exterior lights in automatic light control mode (ALC). Any function or condition that turns on the headlights will override the DRL mode. Thirty seconds after starting the engine if the headlight switch is in the OFF position (OFF), the DRL function will do one of the following:
- turn on the dipped headlights with reduced intensity in daylight conditions;
- will turn on the dipped headlights and outside parking lights in low outside light.
The DRL function works when the ignition key is in the RUN position (JOB), the parking brake is not applied and the transmission is not in PARK (PARKING). When these conditions are met and the DRL ambient light sensor indicates daylight running lights, the daytime running lights come on.
Parking lights and direction indicators
The parking lights can be turned on by turning the headlight switch to the first position. The parking lights can be turned off by turning the switch to the off position.
When the direction indicators are turned on, the corresponding direction indicator lights begin to flash, signaling a change in direction of movement. The front, rear and side turn signals only work when the ignition is on.
The front and rear direction indicators are controlled using the multifunction lever on the left side of the steering column. Turning on the direction indicators is carried out by moving the lever all the way up or down through the stop. When the turn is completed, the lever is automatically released and the front and rear turn signals stop flashing.
When changing lanes and on gentle turns, when the steering wheel does not turn far enough to cancel the signal, the signal lever should be moved to the first stop and held in this position. The turn signals stop when the lever is released.
Fog lights
The fog light switch is located on the instrument panel above the audio system. To use the fog lights, you must first turn on the headlights. Then press the fog light switch. The indicator lamp in the instrument cluster comes on to indicate that the fog lamps are on. To turn off the fog lights, press the switch again. The indicator lamp will turn off.
Fog lights need to be adjusted to properly illuminate the road. Fog lamp alignment should be checked when a new lamp is installed, or after any repair or maintenance work has been carried out on the front of the vehicle that may have changed the position of the fog lamp assembly or its fasteners.
Rear combination lamps
Tail lights, brake lights, reversing lights and direction indicators are all part of the same assembly.
Turning on the headlights or parking lights will also turn on the taillights. When you press the brake pedal, the tail lights become brighter and serve as brake lights.
Additional central brake light
An additional central brake light is located on the rear window and lights up when you press the brake pedal.
Reversing lights
The reversing lights come on when the transmission is shifted into reverse. On vehicles with automatic transmission, the reversing lights are switched on by the position switch "Parking/Neutral".
License plate lighting
The license plate light comes on when the headlights or parking lights are turned on. License plate lights are mounted on the rear end door above the license plate.
Auxiliary Body Controller (XBCM)
Important: Perform SPO reprogramming when replacing X-BCM. The X-BCM controller is located behind the instrument cluster.
Siren Controller Operation
The XBCM controller acts as a master when communicating with the alarm siren controller. The XBCM controller activates, deactivates and activates the alarm depending on the current state of the CTD or VTD anti-theft system. The XBCM receives commands via signals from the GMLAN that determine the current state of the vehicle.
Optional anti-theft horn function (CTD)
The XBCM controller controls the optional CTD horn relay.
Function of detection of failure of rear brake lights and direction indicators
According to current regulations, the direction indicator system must be equipped with a function to detect the failure of one or more lamps. To do this, the XBCM monitors the status of the left and right rear brake lights and direction indicators separately in order to detect a malfunction of the brake lights or direction indicators.