I think, my algorithm changed somehow from what it used to be (and should be in) to something else:

1) If the headlamps are on, then power wash will operate on every fifth operation of the screen washer, provided that the headlamps are still switched on and 10 minutes have elapsed since the headlamp wash. (From the manual).

IT SHOULD WORK LIKE ABOVE, and it was working until something changed, and now 10 minues for me equals only to 3.2 minutes.

2) When I want to wash my headlamp again, (and 10 minutes still not elapsed) I can reset the cycle by switching the headlamps off and back on again, and it will reset the cycle. It was working, until something changed. NOW switching the headlight off and then back on again, won't help.
If I want to wash my headlamps again (and 10 minutes still not elapsed), I need to cycle ignition.

DEALER HAVE NO IDEA ABOUT WHAT TO DO.
We test it on other car, and it exactly like mine. 3.2 minutes and switching the headlamps off and back on again will not help.

Tried to disconnect negative terminal from the battery for 30 min, nothing helped.

Can anyone test it on your car please?
Thanks.

I've got Xenon headlamps (original) 2006 FFRR SC, EUROPEAN.

I've never actually timed it, and to be honest I'm not too bothered about the headlamp washing.

I used to never have it, now because of xenons you are suppposed to have it, so I just put up with it. Can't say my headlamps have ever got SO dirty that I wish to wash them!  Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

rather than be useless and sarcastic and say something like ''if it aint broke dont fix it'' or ''stop looking for problems''im going to try and be helpfull right

-have you used a different dealer in the past?
-has a diferent dealer in the past altered the settings for a previous owner ?
-has new dealer updated software and unaware of a change in cycle time perhaps? onto no6 Range Rover

Everyone needs a hobby

Hello, Thanks for helping

1) No, only one dealer.
2) I'm the only owner of the car, I've check all setting with a dealer and IDS, and we can't find anything about headlamp wash & time cycle.
3) Dealer update software in Transmission and Front Entertainment System (FES), thats all.

Thanks!