Mazda 6. Manual — part 58

MULTIPLE COMMUNICATION SYSTEM, EXTERIOR LIGHTING SYSTEM

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2. PID/data monitor information for the PCM, ABS HU/CM can be verified using an SST (WDS or equivalent).

3. If there is a communication error between the ABS HU/CM and PCM, or between the instrument cluster and

PCM, even if the communication between the ABS HU/CM and the instrument cluster is normal, it is probable
that there is a malfunction in the PCM or PCM-related wiring harnesses.

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OUTLINE

A6E811201052T01

•

Headlight with built-in front fog light,front turn and parking light has been adopted.

•

A projector type has been adopted to the headlight (low-beam) and front fog light. The operation of projector-
type headlight and front fog light is the same as that of the current XEDOS 9/MILLENIA (TA) models.

•

Discharge headlight, that illuminate a wide area, have been adopted for the headlights (low beam). (For
vehicles equipped with discharge headlights.)

•

A headlight auto leveling system, which responds to the vehicle attitude and automatically adjusts the optical
axis of the headlights, has been adopted. (For vehicles equipped with discharge headlights.)

•

Stepped reflectors have been adopted to the rear combination lights and inboard combination lights.

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Module

PID name (definition)

Condition

Probable malfunction point

ABS HU/CM

PCM MSG
(Missing message from the PCM)

Not Present Communication error between ABS HU/CM and PCM

IC MSG
(Missing message from the
instrument cluster)

Present

Normal communication between ABS HU/CM and
instrument cluster

Instrument
cluster

PCM MSG
(Missing message from the PCM)

Not Present

Communication error between instrument cluster and
PCM

ABS MSG
(Missing message from the ABS
(ABS/TCS) HU/CM or DSC HU/
CM)

Present

Normal communication between instrument cluster and
ABS HU/CM

EXTERIOR LIGHTING SYSTEM

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EXTERIOR LIGHTING SYSTEM

STRUCTURAL VIEW

A6E811201052T02

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A6E8112T102

1

Front combination light

2

Rear combination light

3

Inboard combination light

4

Front side turn light

5

License plate light

6

High-mount brake light

7

High-mount brake light (rear spoiler type)

8

Steering angle sensor (with DSC)

9

Disc (with DSC)

EXTERIOR LIGHTING SYSTEM

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T

T

FRONT COMBINATION LIGHT

A6E811201052T03

Outline

•

Projector type headlights (low-beam) and front fog lights have been adopted, and these have been
incorporated, along with the front turn light and the parking light, into a single unit to improve size reduction.

•

Discharge headlights, with a wide illumination area and projection of white light with a hue approaching that of
the sunlight, have been adopted. (For vehicles equipped with discharge headlights.)

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DISCHARGE HEADLIGHT

A6E811201052T04

Outline

•

Compared with the current headlights, the illumination area is wider. Moreover, due to projection of white light
with a hue approaching that of the sunlight, night visibility white driving has been improved.

•

Use of the gas discharge bulb realizes high efficiency and low power consumption luminosity.

Structural View

A6E8112T113

1

Headlight bulb (low-beam)

2

Discharge headlight bulb (low-beam)

3

Front turn light bulb

4

Front fog light bulb

5

Headlight bulb (high-beam)

6

Parking light bulb

7

Front combination light

8

Discharge type

9

Halogen type

A6E8112T106

1

Front combination light

2

Discharge headlight bulb

3

Discharge headlight control unit

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EXTERIOR LIGHTING SYSTEM

Structre And Operation

1. The high voltage pulse (alternating current approx. 25,000 V) traveling from the discharge headlight control unit

is applied between both discharge headlight bulb terminals, energizing the xenon gas in the bulb.

2. Based on the energizing of the xenon gas, the temperature of the discharge headlight bulb interior increases,

vaporizing the mercury and discharging the arc.

3. By the mercury and discharging 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 UNIT

A6E811201052T05

Function

•

Controls the amount of electrical current while the discharge headlight 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

Structure And Operation

•

Built into the headlight and installed on the headlight lower side.

•

Switches the direct current from the battery to alternating current and optimally controls the current supply
output to the bulb.

A6E8112T111

1

B+

2

Discharge headlight control unit

3

Terminal

4

Discharge headlight bulb

5

Xenon gas

6

Metallic atoms

7

Metallic iodide

8

Mercury

9

Light

1

Discharge headlight control unit

A6E8112T121