MG MG6 Series 2011 Service Manual page 769

Lamps
Direction Indicators and Hazard Warning Light
System
With the handset docked or the ignition on, the direction
indicators and side repeaters are operated using the
direction indicator lever. The corresponding indicator lamps
will illuminate with a 1:1 on/off ratio accompanied by a
corresponding MS CAN Bus signal to the instrument pack
to illuminate the relevant telltail lamp and emit an audible
warning at the same rate. The BCM monitors the status of
the direction indicators and side repeaters and, in the event
of detecting a bulb failure shall continue to illuminate the
external lamps at the nominal rate but double the frequency
of the MS CAN Bus signal to enable the tell-tail lamp and
audible warning to operate at twice the nominal rate, thereby
warning the driver of the fault. Failure of a side repeater LED
will not cause the front or rear indicators to illuminate at
twice the nominal rate.
The hazard warning light system uses the direction indicators
and side repeater lamps. Operation of the hazard warning
lights is selected using the non-latching momentary switch
located on the centre console between the centre air vents.
This sends a signal to the BCM which causes the direction
indicators and side repeaters to illuminate.
features a hazard triangle symbol which illuminates when the
hazard warning lights are active. The symbol is also illuminated
at a low intensity when the side lamps or headlamps are on. If
the handset is docked or the ignition is on and the direction
indicator column lever is operated, the corresponding lamps
will continue to illuminate at the nominal rate and the opposite
direction indicators and side repeaters will cease illuminating
until the direction indicator column lever is returned to its
original position, the hazard warning lights will continue to
operate. This feature enables the driver of the vehicle to signal
left or right when the vehicle is being towed. If the direction
indicators are operating and the hazard warning light switch is
operated, the hazard warning lights will take priority over the
direction indicators.
In the event of the BCM detecting either an internal or CAN
Bus fault, and with the handset in any position, the hazard
lamps will continue to operate in accordance with the last valid
signal request. If the BCM detects a heavy braking condition,
the hazard warning lights will operate immediately. Hazard
warning light operation will continue until the hazard warning
light switch is operated.
If the BCM detects that the inertia switch has been tripped,
the hazard warning lights will operate immediately. Hazard
warning light operation will continue until the hazard warning
light switch is operated for a minimum of 5 seconds. This is
to prevent the switch being pressed due to impact during the
crash. The hazard warning lights will not be stopped when
Version 2.0
the inertia switch is reset, but only when the hazard switch is
pressed.
Direction Indicator and Dipped/Main Beam
Column Switch
The column switch comprises three switches. The direction
indicator switch is a three position latching switch which
completes earth paths from the MLS via resistors in the
switch. The differing resistance values are used by the MLS to
determine which direction indicator has been selected. The
switch has a central off position and is moved to this position
automatically when the steering wheel is in the straight ahead
position.
The headlamp flash and dipped/main beam switch is a
three-position non-latching switch which completes earth
paths from the BCM via resistors in the switch. The switch is
in the off position when at rest. Pulling the lever towards the
steering wheel will trip one of two switches:
• The first switch operates the main beam headlamp flash.
The switch completes an earth path through a resistor
and the BCM recognises the resistance value as a request
to activate the headlamp flash. The headlamps will remain
illuminated until the switch is released.
The switch
• The second switch toggles the headlamps between
dipped and main beam. The switch completes an earth
path through a resistor and the BCM recognises the
resistance value as a request to activate or de-activate
the main beam headlamps.
The indicators and dipped/main beam headlamp switches are
only operative with the handset docked or the ignition on. If
the main beam is selected and the MLS is moved to the side
lamp or off position or the handset is removed, main beam will
be de-selected and dipped headlamps will be illuminated at the
next headlamp request.
Front Fog Lamps
The front fog lamps will operate with the side lamps or
headlamps on, the ignition on, and the MLS pulled out to the
first latched position. If the MLS is returned to the original
latched position or the handset is moved to the docked
position or removed, the front fog lamps will be extinguished.
The tell-tail lamp illuminates in the instrument pack whenever
the front fog lamps are on.
If the fog lamps are operated before the engine is cranked,
they will extinguish during engine cranking to allow the starter
motor to draw the maximum current
Rear Fog Lamp(s)
The rear fog lamp(s) will operate with the dipped beam or
front fog lamps on, the MLS pulled out to the second latched
position and the ignition on. If the MLS is returned to the first
latched (AUX) position, or the handset is moved to the docked
Lighting Systems
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