So iv been on a random mission and actually gone fiddling with something that was and is still working, and not wanting to spend out for a gap iid when theres no guarantee that it would do what I was trying to achieve
My goal, to get the leds to not flicker when doing bulb checks and to be able to run trailer led lights, while keeping failed unit warnings, without the need for adapter boxes,
My supercharged is a December 2005 55plate with 2010-2012 facelift, 2012 facelift black inserts in the rear lights, All genuine LR units
As it runs leds vs normal halogen lights it has adapter boxes that in my eyes will one day fail, and i also can't have trailer leds,
I tried with sdd in engineering mode and i cant reconfigure my lcm to accept leds
So this week iv purchased 2 e39 2000 5 series and found they share an lcm with the 1st gen x5s,
My lcm in my range rover is a LR lcm 4 and the e39s both had lcm 3s
So i managed to reconfigure the e39 lcm to work in the 4.2 supercharged and accept my l322 milage and vin. And get everything working as oem but being a lcm 3 led still didn't exist so it was just a case of turn the warnings off but no support for led sidelights,
I tried to recode my l322 lcm 4 to a bmw vin to recode it but no success,
So iv got a facelift x5 with an lcm 4 in it, iv recoded that to work with the range rover milage vin no tamper dot ect, failed bulb warnings are still on and the cold and hot bulb check but pwm is altered to suit the leds and il actually still get a warning if an led fails,
I can also run led trailer lights with no issues and still get a bulb warning if a trailer light fails too,
Check control still works, lcm coding is still avaliable and works on sdd (but still no option for the cold or hot checks or pwm on my version of sdd) but it also works and plugs and reads with the bmw pa scanner to recode, And a full save of the eprom and coding data means a replacement could be cloned without the need to plug it in a bmw to change anything
Check control still fully functional, auto lights and wipers still fully functional, no adapter boxes need anymore just unwired them and success its like its oem
Im quite happy all this has cost me is 2hrs graft this evening