Description
General
The exterior lighting is controlled by the Light Check Module (LCM). The LCM controls the following vehicle functions:
^ Control and monitoring of exterior lamps including turn signal indicators and hazard warning functionality
^ Illumination dimmer control of instrument cluster and all interior switch illumination
^ Communication and control and monitoring of trailer lighting via the trailer module
^ Monitoring and evaluation of check control inputs from other system control modules and output of applicable messages in the instrument cluster message center.
The LCM is connected to the I Bus and communicates with other vehicle systems via the instrument cluster. The LCM contains a microprocessor which performs the control, monitoring and evaluation functions.
A combined rain/light sensor is fitted which controls the automatic wiper operation and the automatic lighting function.
The exterior lighting system comprises the following exterior lamps:
^ Front and rear side lamps
^ License plate lamps
^ Side marker lamps (if fitted)
^ Front and rear turn signal indicator lamps
^ Turn signal indicators side repeater lamps
^ Stop lamps and high mounted stop lamp
^ Reversing lamps
^ Rear fog lamps
^ Front fog lamps
^ Static bending lamps (if fitted - All except NAS)
^ Low and high beam headlamps
^ Adaptive Front lighting System (AFS) (if fitted).
Exterior Lamp Bulbs
The following table shows the bulbs used for the exterior lighting system and their type and specification.
Exterior Lamps Bulb Type/Rating Table
The bulbs, with the exception of the LED's, are driven by Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) within the LCM. The LCM provides a Pulse Width Modulation (PWM) output to the front parking lamp and the tail lamp bulbs to extend the bulb life. The PWM output is rapidly switched on and off to provide bulb emulation when a bulb fails.