Mazda X-5. Manual — part 112
LIGHTING SYSTEMS
09–18–3
09–18
FRONT COMBINATION LIGHT CONSTRUCTION
E5U091851060N01
• A headlight with built-in front turn light and parking light has been adopted for design improvement.
• Projector type headlights have been adopted, and these have been incorporated, along with the front turn light
and the parking light, into a single unit to reduce size.
• Discharge headlights, with a wide illumination area and projection of white light with a hue similar to sunlight,
have been adopted.
Projector-type Headlight
• Light emitted from the first focal point is projected off the reflector, gathered at the second focal point, and
output through the convex lens.
End Of Sie
DISCHARGE HEADLIGHT OUTLINE
E5U091851030N01
• Compared with the current model, the illumination area is wider. Moreover, due to projection of white light with
a hue similar to sunlight, night visibility while driving has been improved.
• The gas discharge bulb is efficient with low power consumption and high luminosity.
End Of Sie
HEADLIGHT
BULB (LO)
FRONT TURN
LIGHT BULB
FRONT
COMBINATION LIGHT
PARKING LIGHT
BULB
DISCHARGE
HEADLIGHT
BULB (LO)
HEADLIGHT
BULB (HI)
SEC. A—A
A
A
E5U918ZS5102
SECOND FOCAL POSITION
CONVEX
LENS
FIRST FOCAL POSITION
REFLECTOR
CHU0918S129
LIGHTING SYSTEMS
09–18–4
DISCHARGE HEADLIGHT STRUCTURAL VIEW
E5U091851030N02
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DISCHARGE HEADLIGHT OPERATION
E5U091851030N03
1. A high voltage pulse (alternating current approx. 25,000 V) travelling from the discharge headlight control
module is applied between both discharge headlight bulb terminals, energizing the xenon gas in the bulb.
2. Due to the energizing of the xenon gas, the temperature of the discharge headlight bulb interior increases,
vaporizing the mercury and discharging an arc.
3. Due to the mercury and discharging of the arc, the temperature of the discharge headlight bulb interior
increases further, metallic iodide is vaporized and separated, and metallic atoms are discharged, producing
light.
.
End Of Sie
DISCHARGE HEADLIGHT CONTROL MODULE FUNCTION
E5U091851030N04
• Controls the amount of electrical current while the discharge headlights are on to maintain optimum brightness
together with lighting stability.
• The failure detection functions are as follows:
— Abnormal input detection function
— Abnormal output detection function
Abnormal Input Detection Function
• If the discharge headlight control module input voltage (9—16 V) fails to maintain operational voltage (except
for the drop in voltage immediately after the headlights are turned on), the discharge headlight control module
turns off the headlights for protection and to prevent partial operation.
• The discharge headlight control module turns the headlights back on at resumption of normal operational
voltage.
A
A
HEADLIGHT
DISCHARGE
HEADLIGHT BULB
DISCHARGE HEADLIGHT
CONTROL MODULE
SEC. A—A
A
E5U918ZS5103
B+
1
6
2
4
2
3
5
8
7
4
B3E0918T121
1
Metallic atoms
2
Terminal
3
Metallic iodide
4
Light
5
Mercury
6
Discharge headlight bulb
7
Xenon gas
8
Discharge headlight control module
LIGHTING SYSTEMS
09–18–5
09–18
Abnormal Output Detection Function
• If there is an abnormality in the output system (detects an open or GND short circuit in harness), the discharge
headlight control module turns off the headlights for protection and to prevent partial operation errors.
• If the discharge headlight control module turns off the headlights due to an abnormality in the output system,
the discharge headlight control module will maintain them in the off condition until the light switch is turned
again from off to on.
End Of Sie
DISCHARGE HEADLIGHT CONTROL MODULE CONSTRUCTION/OPERATION
E5U091851030N05
Warning
• Incorrect servicing of the discharge headlights could result in electrical shock. Before servicing
the discharge headlights, always refer to the discharge headlight service warnings. (See MX-5
Workshop Manual.)
• Built into the headlight and installed on the front
combination light lower side.
• Switches the direct current from the battery to
alternating current (25,000 V) and optimally
controls the current supply output to the bulb.
End Of Sie
HIGH-MOUNT BRAKE LIGHT CONSTRUCTION
E5U091851580N01
• Installed to the rear deck panel with the clips.
• Using LED has resulted in reduced energy
consumption.
End Of Sie
DISCHARGE HEADLIGHT CONTROL MODULE
E5U918ZS5104
HIGH-MOUNT BRAKE
LIGHT BULB
HIGH-MOUNT BRAKE LIGHT
REAR DECK PANEL
E5U918ZS5009
LIGHTING SYSTEMS
09–18–6
REAR COMBINATION LIGHT CONSTRUCTION
E5U091851150N01
• A step reflector that diffuses and reflects the light of the rear combination light bulbs, has been adopted. A flat,
uncut lens has been adopted to control illumination distribution.
• A round reflector for the rear combination lights has been adopted to improve design.
End Of Sie
LICENSE PLATE LIGHT CONSTRUCTION
E5U091851270N01
• Installed to the trunk lid with the connecting tabs.
End Of Sie
DRL SYSTEM OUTLINE
E5U091800200N01
• The DRL system automatically operates the low-beam headlights when the ignition switch is turned to the ON
position.
End Of Sie
DRL SYSTEM OPERATION
E5U091800200N02
• The DRL system automatically turns on the high-beam headlights with their brightness reduced under the
following conditions:
End Of Sie
SEC. A—A
A
A
BRAKE LIGHT/
TAILLIGHT BULB
REAR TURN
LIGHT BULB
BACK-UP
LIGHT BULB
REAR COMBINATION LIGHT
E5U918ZS5005
TAB
TRUNK LID
LENS
LICENSE PLATE
LIGHT BULB
LICENSE PLATE LIGHT
E5U918ZS5006
Operation condition (Input signal)
Operation condition of illumination (Output signal)
Ignition
switch
Parking
brake
switch
Headlight
switch
Flash-to-
pass
switch
Low-beam headlight
High-beam headlight
Front fog light
ON
OFF
OFF
TNS
OFF
-
Illuminates (DRL)
-
ON
Illuminates
Illuminates
-
HEAD
OFF
Illuminates
-
Illuminates
ON
Illuminates
Illuminates
-
ON
OFF
TNS
OFF
-
-
-
HEAD
Illuminates
-
Illuminates
LOCK
-
OFF
TNS
OFF
-
-
-
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