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HEADLAMP AGLINMENT CORRECTOR

166

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HEADLAMP AGLINMENT CORRECTOR - Description

All trim levels of the vehicle are equipped with GAS DISCHARGE dipped headlamps.

The lighting provided by this type of bulb is considerably greater than from conventional bulbs, in terms of both quality of light and size of

illuminated area.

The strong brightness produced by this type of headlamp requires the use of an automatic system to maintain a constant headlamp alignment and

avoid dazzling oncoming vehicles.

The automatic adjustment of the headlamps consists of:

front alignment sensor mounted on front left suspension

rear alignment sensor mounted on rear left suspension

a control unit located in each of the two headlamps

two actuators mounted on the front lights clusters

The left headlamp is the Master control unit while the right acts as a Slave unit.

The two control units download the dipped beam command, car speed and - to manage the function - signals from two sensors (potentiometric) on

the wheel axles that manage front and rear ride.Depending on the inputs, the control unit controls the appropriate adjustment actuator.

The supply for the headlamp control system is the same as for the dipped headlamps.

The circuit is supplied by a specific relay and protected by two fuses, one for the right headlamp and one for the left headlamp, located in the engine

compartment junction unit.

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HEADLAMP AGLINMENT CORRECTOR - Functional description

The dipped beam headlamps are controlled by electronic Check device M45 , which receives control signals from the switches and controls the bulbs

while also checking the various lines.

The supply for the Check device M45 arrives directly from the battery at pin 1 of connector C and 6 of connector E via fuses F17 and F15 of junction

unit B2 for the right and left branches of the lights, respectively.

The ignition-controlled supply (15/54) arrives via relay T1 and fuse F9 of junction unit B2 at pin 3 of connector B: pin 8 of connector C is earthed.

The dipped headlamps switch for the exterior lights control H6 sends the command from pin 8 of connector A to pin 15 of connector A of M45 when

the dipped headlamps are switched on.

In response to this signal, the Check device M45 controls the supply to the dipped beam headlamps from pin 7 of connector C: this signal energizes

the relay T2, located in the engine compartment junction unit B1 which supplies the headlamps F10 (left) and F11 (right). Each circuit is protected

by a junction unit B1 fuse: F15 for the left headlamp and F4 for the right one.

Lamps F10 and F11 as well as sensors K28 and K29 receive an ignition-operated supply (15/54) at pin 12 for the lamps and at pin 5 for the sensors

via the line protected by fuse F6 of junction unit B2.

The control unit for F10 and F11 receives output signals from pin 4 at pin 9 from sensors K28 and K29.

The control unit for F10 and F11 is also connected from pin 8 to socket R10 for the system fault diagnosis - pin 12

See

E8010 DIAGNOSTIC MULTIPLE CONNECTOR .

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HEADLAMP AGLINMENT CORRECTOR - Location of components

Component code

Name

Assembly reference

Terminal board

Junction unit

5505A

Junction unit

5505A

Dashboard junction unit (CPL)

Junction unit

5505A

Relay unit

5505A

MAXI FUSE box

B99

Battery fuses junction unit (CBA)

5530B

C10

Front left earth

C13

Front earth on left side panel

5505A

C15

Facia earth, driver's side

C21

Dashboard earth on Air Bag bracket

C21

Passenger side dashboard earth

C30

Rear left earth

C31

Rear right earth

Front-dashboard coupling

Rear - front coupling

Rear-engine compartment coupling

D19

Dashboard / battery coupling

D20

Dashboard-rear coupling

D25

Dashboard-left rear coupling

D25

Dashboard-rear coupling left

D75

Radio phone coupling

F10

Left headlamp

5540B

F10

Left headlamp

5540B

F11

Right headlamp

5540B

F11

Right headlamp

5540B

Ignition switch

5520A

Steering column switch unit

5550A

Exterior lights control

5540A

H15

Headlamp alignment control

5540C

K28

Front xenon lamps sensor

5540C

K29

Rear xenon lamps sensor

5540C

M45

Electronic Check device

M45

Electronic Check device

5560C

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M87

Xenon headlamps control unit

N30

Left headlamp alignment corrector motor

5540B

N30

Left headlamp alignment corrector motor

5540B

N31

Right headlamp alignment corrector motor

N31

Right headlamp alignment corrector motor

5540B

R10

Multiple tester connection

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