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[lummz]

I have a trouble with the self leveling system for my HID headlights, neither the right or left headlight move at all. I'm about to troubleshoot the electric engines that move the headlights. Those seen in the picture below.



I'm thinking of connecting 12V from the battery to the input connector of them. There are 5 pins on the connector, is there any risk of damage if I just try around putting current through the different pins and look for movement? The connector looks like:

[zirk]

I really wouldn't start stuffing 12 volts around willy nilly unless your sure of the pin outs and correct working voltage TBH.

[TheBoy]

Halogen or HID headlights?

[lummz]

Yeah I'm a bit worried, donīt want to break anything. Is there any way of making sure they work?

It's HID headlights.

[TheBoy]

Put headlights back together, pop the sensor on front suspension, and move it with ign and lights on, watching lights

[TheBoy]

Easiest to unscrew E8 torx bolt, rather than pop balljoint

[DrAndyB]

I guess there is not a wiring diagram for the omega ? (Assuming frommfacelift model ?). If there is then should tell you the pin outs and what goes where.  As there are 4 pins from the PIC, I would guess one is a common (earth/0v), other live and other switched live for either up or down adjustment - I have a Haynes manual for the pre facelift model which I think they did wiring diagram in the back so I'll have a gander :-)

[lummz]

Easiest to unscrew E8 torx bolt, rather than pop balljoint

Okay, I've done that and nothing happened, tried with the sensor at the back also. Thinking about it.. as neither lamp is moving problem is most likely with the sensors. Or is there anything other than the sensors or the electric engine that can be broken?

Another question, when I changed the drop link I accidently popped the arm (encircled in the figure) from the sensor. It didn't fit very tight so it had probably came lose before. Anyway the leveling system didn't work before I did this, but is there any need of calibrating the system or resetting it when popping that positioning arm?

I guess there is not a wiring diagram for the omega ? (Assuming frommfacelift model ?). If there is then should tell you the pin outs and what goes where.  As there are 4 pins from the PIC, I would guess one is a common (earth/0v), other live and other switched live for either up or down adjustment - I have a Haynes manual for the pre facelift model which I think they did wiring diagram in the back so I'll have a gander :-)

Yes it's the facelift model, and don't have any wiring diagram. As i'm Swedish I guess you mean you're gonna take a look, thanks or that you'll have a gander for dinner... which doesn't sound bad either 

[DrAndyB]

OK - Haynes manual has the wiring diagram - just checked 

Assuming this is the Headlight Levelling unit for the Xenon ? Then Haynes diag confirms 5 pins ( looks like 5 pins on your module from inspection ?) But these are plugged into k137(aka low beam levelling control unit). Wire colours are:

Pin 1 - BR-GE
Pin 2 - GE
Pin 4 - BR
Pin 5 - SW-BR
Pin 6 - BR-GR

No pin 5 listed - colours on plug will be:

BR = Brown, GE = Yellow, SW = Black, GR = Grey.

It is difficult however to see which pin does what is its wired to the control unit and diagram only gives the 5 wires with no real indication what does what( 2 and look like they are the motor supply, with 1, 5 and 6 a variable resistor input.  There is however the front and rear level sensors also wired into the low beam level sensor unit to perhaps best to unplug and check for good clean connection.

Both plugs to the unit should be the same, so then ignition on you should see something on the pins if use a volt Meyer and connect negative to mattery earth and use other pin to check on the plug.

It may of course be the main control unit so check fuse F15 as this seems to be where the supply come from.

Hope it helps 

[DrAndyB]

Took me so long to write I saw your reply 

As both appear to be sick I would guess that the main control unit is faulty.  Both headlight level adjusters and front and rear level sensors plug into this unit.  Not sure where this would be located on the car - I am sure another OOfer could give some guidance.

There is, as mentioned, a fuse to this unit (fuse 15) so check that also as may have blown.

Finished my Gander now - off for a Goosey 

Dr.Andy B 

[amba]

Just curiuos...TB WROTE.." moving the sensor arm with the ball joint removed will move the  motors inside the lights"

Does this apply to both the front and rear sensors then ?

If the arm is removed from both sensors and moved individually would they both move the lights ?? assuming if 1 sensor is faulty it will not move the lights.

If only 1 light moves the fault is the motor inside headlight.

Could somebody confirm that is correct...sorry to jump on this thread but it may be of use to the OP

[TheBoy]

ECU is up in wheel arch liner, drivers side (for rhd). Never known one fail, but wiring sometimes does.

I'd expect if the servos were fault, a MID message would be presented.

[amba]

On switching ignition I get a warning "headlight range"

Hoped I could trace the faulty component by testing each part individually.

[05omegav6]

On switching ignition I get a warning "headlight range"

Hoped I could trace the faulty component by testing each part individually.

Normally the front sensor, but both front and rear live on the nearside, so collect all the crap thrown up from the gutter

If front sensor moves the lights, but rear doesn't then rear dead and vice versa, similarly if one light moves and other doesn't then the fault lies with the motor or its wiring

Just to add... it will be blindingly obvious if the problem is due to the arm being disconnected, either reattach the rod to the ball and secure with a small cable tie, or if arm (looks like an RC servo arm) is separate from the sensor then you need a new sensor as that is terminal

[lummz]

Thanks for the info DrAndyB, however don't think I dare test it with any current. Checked the fuse and it is okay.

Both plugs to the unit should be the same, so then ignition on you should see something on the pins if use a volt Meyer and connect negative to mattery earth and use other pin to check on the plug.

I have trouble understanding this. Are you suggesting to check the leveling sensors with a voltmeter?


So possible fails are:
ECU (main control unit) - TheBoy has not know anyone to fail though
Electric level engines - which I assume work for now
Wiring
Leveling sensors

So hopefully the problem is with the sensors then. But as I said I've tried moving both the front and the rear sensor but nothing has resulted in any movement of any of the headlights. So that means that both of the sensors then has to be broken, if everything else is working??

I'd expect if the servos were fault, a MID message would be presented.

I get a MID message , it's in Swedish though but I think it's the same as "low beam fld/vision"

or if arm (looks like an RC servo arm) is separate from the sensor then you need a new sensor as that is terminal

As I said my arm has separated from the sensor at least one time. Is it a fact that that kills the sensor? I've read otherwise in another thread. That the positioning is done with a magnet attached to the arm which isn't affected from a separation.