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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.

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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.

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HEADLIGHT
BULB (LO)

FRONT TURN
LIGHT BULB

FRONT
COMBINATION LIGHT

PARKING LIGHT
BULB

DISCHARGE
HEADLIGHT
BULB (LO)

HEADLIGHT
BULB (HI)

SEC. 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.

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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.

HEADLIGHT

DISCHARGE
HEADLIGHT BULB

DISCHARGE HEADLIGHT
CONTROL MODULE

SEC. A—A

E5U918ZS5103

B+

B3E0918T121

Metallic atoms

Terminal

Metallic iodide

Light

Mercury

Discharge headlight bulb

Xenon gas

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.

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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.

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HIGH-MOUNT BRAKE LIGHT CONSTRUCTION

E5U091851580N01

• Installed to the rear deck panel with the clips.

• Using LED has resulted in reduced energy

consumption.

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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.

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LICENSE PLATE LIGHT CONSTRUCTION

E5U091851270N01

• Installed to the trunk lid with the connecting tabs.

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DRL SYSTEM OUTLINE

E5U091800200N01

• The DRL system automatically operates the low-beam headlights when the ignition switch is turned to the ON

position.

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DRL SYSTEM OPERATION

E5U091800200N02

• The DRL system automatically turns on the high-beam headlights with their brightness reduced under the

following conditions:

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SEC. 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

OFF

OFF
TNS

OFF

Illuminates (DRL)

Illuminates

HEAD

OFF

Illuminates

OFF
TNS

OFF

HEAD

Illuminates

LOCK

OFF
TNS

OFF

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