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W222 FL headlight weird problem, only Right side detected
04-09-2023, 07:27 AM,
Post: #1
W222 FL headlight weird problem, only Right side detected
Hi there guys, I am facing a bizarre problem on a W222 facelift. The client washed the car and soon after, turn signal started to show error in dash. Next day, LH headlight wouldn't start anymore. Replaced headlight ECU, but HLI_FL253 not detected anymore.If I plug both headlights, only HLI_FR253 is detected with a timeout error.
If I plug only RH headlight, HLI_FR253 detected and can be addressed with "communication to LH headlight missing"
If I plug only LH headlight, still HLI_FR253, but with "malfunction" telling me that maybe the wrong headlight is connected.
I measured pin 53 that gives MASTER/ SLAVE assignment, ground on LH, positive on RH, as it should. MEasured continuity to CAN PERIPHERAL in CAN lines, all ok.
I am running out of ideas.
Any thoughts?
Thanks
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09-09-2023, 20:14 PM,
Post: #2
RE: W222 FL headlight weird problem, only Right side detected
disconnect right side headlight and keep only left side, do in моиасо side reset, then hard reset, now it will appear as hli_fl253 and hli_fr253 and continue your coding
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[+] 1 user says Thank You to dr.aws for this post
12-09-2023, 08:26 AM,
Post: #3
RE: W222 FL headlight weird problem, only Right side detected
(09-09-2023, 20:14 PM)dr.aws Wrote:  disconnect right side headlight and keep only left side, do in моиасо side reset, then hard reset, now it will appear as hli_fl253 and hli_fr253 and continue your coding

There is no side reset for HLI in моиасо. Not supported by smrd, the assignment is hardware.
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25-04-2024, 15:33 PM,
Post: #4
RE: W222 FL headlight weird problem, only Right side detected
I have the same problem.
I cannot change the coding of the right side to the left in the HLI_FL253 module, i.e. it now recognizes it as HLI_FR253.
I cloned the variant coding from the old module.
All light channels work well, except the turn signal, of course.
I disconnected the right lamp, unfortunately I cannot change the settings in the left lamp so that the module reports as the left side.
I tried - жеитяу, no options, I once saw on another car the "delete side settings" option , Vёdїамо and DTS моиасо - I clicked everything, unfortunately the module is still on the right one.
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