height adjustment RENAULT SCENIC 2007 J84 / 2.G Electrical Equipment - Xenon Bulbs Workshop Manual

80C -6V2 MR-372-J84-80C000$020.mif
80C
Program No.: V010
Vdiag No.: 05
1. COMPONENTS OF THE XENON BULB SYSTEM
The system consists of the following components:
–Front vehicle level sensor (the xenon bulb computer is built into this sensor).
–Rear vehicle level sensor.
–Right and left-hand headlight adjustment motor.
–Bulb high-voltage power unit (ballast).
–Xenon bulbs.
The K line can be used for fault finding. The system is not multiplexed.
2. SYSTEM OPERATION
When the control lever is in position (dipped headlights), it sends a signal to the UCH. The UCH processes the signal
and, through the CAN network, asks the Protection and Switching Unit to turn on the xenon bulbs.
When the bulbs come on, the adjustment motor moves through three positions: low, high, initial.
This is its initialisation.
If the vehicle is travelling above 6 mph (10 km/h) when the bulbs come on, there is no initialisation.
The computer manages various signals to adjust the amount of light:
–Vehicle speed: Signal provided by the ABS computer. Above 18 mph (30 km/h), the adjustment motors raise
the bulbs to provide optimum lighting for the driver.
–Vehicle front and rear height: signals from the front and rear height sensors. These sensors track the angular motion
of the vehicle's body (deceleration, acceleration, vehicle loaded). The computer then controls the motors to adjust
the beam and provide optimum lighting.
–System initialisation:
When the vehicle is unlocked, even if the dipped headlights are off, the system moves the adjustment motors
to the low position and then the initial position.
This initialises the system.
XENON BULBS
Fault finding – System operation

80C-34V2 MR-372-J84-80C000$110.mif
80C
Program No.: V010
Vdiag No.: 05
NOTESOnly refer to the customer complaints after a full check with the diagnostic tool.
NO COMMUNICATION WITH THE COMPUTER ALP 1
NO HEIGHT ADJUSTMENT ON EITHER OR BOTH HEADLIGHTS, REGARDLESS
OF VEHICLE LOADALP 2
GLARE OR BEAM TOO HIGHALP 3
THE LEFT AND RIGHT LOW-BEAM HEADLIGHTS DO NOT LIGHT AT THE SAME
HEIGHTALP 4
XENON BULBS
Fault finding – Customer complaints

80C-36
AFTER REPAIRPerform a check using the diagnostic tool.
Deal with any faults found.
V2 MR-372-J84-80C000$120.mif
XENON BULBS
Fault finding – Fault finding charts80C
Program No.: V010
Vdiag No.: 05
ALP 2No correction of the height of the one or both headlights
whatever the vehicle load
NOTESOnly refer to this customer complaint after a complete check with the diagnostic tool.
Confirm that initialisation is performed when the dipped headlights are switched on.
If it is not, the actuators or a circuit component may be defective.
Check the condition of fuse F1K (5A) located in the vehicle's glovebox.
Repair if necessary.
Run command AC012 Check actuator high and low position to find out which headlight is faulty.
Check for mechanical blockage of the headlight (ball joint popped out, reflector stuck, actuator seized).
Make sure that the sensors are properly positioned and mounted on the body, and check the condition
of the linkage.
If all the checks described above fail to solve the fault, replace the faulty adjustment motor(s).
LAD_V05_ALP2

80C-37V2 MR-372-J84-80C000$120.mif
XENON BULBS
Fault finding – Fault finding charts80C
Program No.: V010
Vdiag No.: 05
ALP 3Glare, or beam too high
NOTESOnly refer to this customer complaint after a complete check with the diagnostic tool.
Check that headlights are mounted correctly.
Check that the right-hand and left-hand headlights light at the same level.
If the headlights differ in height, adjust the headlights manually.
Check the condition of system mechanical components (sensor mounting, links).
Check whether the initial front and rear heights PR032 Reference front height and PR033 Reference rear
height are similar.
If there is a major difference between these two parameters, perform a computer calibration (CF001 Computer
calibration described in the Configurations and Programming section).
Run actuator command AC012 Check actuator high and low position.
If the light beam moves: adjust the headlights manually.
If the light beam does not move:
Check that the adjustment motors are actuated when the command is run (motor noise + vibration).
If the motors are actuated but the beam does not move, check the condition of the adjustment motor/headlight
coupling rods. Replace the faulty headlight(s).
LAD_V05_ALP3
AFTER REPAIRPerform a check using the diagnostic tool.
Deal with any faults found.

80C-38V2 MR-372-J84-80C000$120.mif
XENON BULBS
Fault finding – Fault finding charts80C
Program No.: V010
Vdiag No.: 05
ALP 4The left-hand and right-hand dipped headlight beams do not light at the same
height
NOTESOnly refer to this customer complaint after a complete check with the diagnostic tool.
Check that headlights are mounted correctly.
Check that the right-hand and left-hand headlights light at the same level.
If the headlights differ in height, adjust the headlights manually.
Check the condition of system mechanical components (sensor mounting, links).
Check whether the initial front and rear heights PR032 Reference front height and PR033 Reference rear
height are similar.
If there is a major difference between these two parameters, perform a computer calibration (CF001 Computer
calibration described in the Configurations and Programming section).
Run actuator command AC012 Check actuator high and low position.
If the light beam moves: adjust the headlights manually.
If the light beam does not move:
Check that the adjustment motors are actuated when the command is run (motor noise + vibration).
If the motors are actuated but the beam does not move, check the condition of the adjustment motor/headlight
coupling rods. Replace the faulty headlight(s).
LAD_V05_ALP4
AFTER REPAIRPerform a check using the diagnostic tool.
Deal with any faults found.