BPM
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Technical Topics > DIY and Coding Discussions

Post Reply
 
Thread Tools Search this Thread
      01-23-2021, 11:16 PM   #1
hC1001
Lieutenant
256
Rep
492
Posts

Drives: E36 M3, F80 M3
Join Date: Nov 2019
Location: Brooklyn, NY

iTrader: (3)

Coding help. Driver side headlight stopped working.

***UPDATE This turned out to be a disconnected connector inside the corner light module. Need to remove 6 torx screws holding the corner light module to the headlight. Once removed, you can access the small white connector and connect it to the parking light(3 amber LED). After connecting to the parking lights, i had to initialize the LED headlights in ISTA. If anyone has this same issue, just check the connector on the inside of the headlight first. you wont need to initialize the headlights.***

Hi, i got a weird one. I recently noticed the 3 amber LEDs on the driverside headlight wasnt on when turning on parking lights. The passengerside is working correctly. I believe this started after i updated all the ECU istep from F020_17_03_505 to F020_20_07_525 using Esys.

I scanned the car and there is a fault at STML: "805CAB Side marker light: Open circuit"

I searched online and saw some ppl recommend teaching the LED headlights. When i did that, It initialized the passengerside but it wasnt able to complete the driverside headlight and disabled it. During initialization, I saw the angel eyes, turn signal and parking light turn on and working but it shut off after a few seconds. Now driverside turn signal, angel eyes and parking light dont work. I also get left headlight malfunction on the dash. The low beams still work. I scanned for errors again and this time i get something like "Need LED taught in procedure" instead of the open circuit error.

I think ill try injecting CAFD(detect CAF for SWE) for TMS ecu and see if that fixes it. Has anyone been through this before? It seems like a coding problem and i suspect its from the istep update.

Thanks,

Last edited by hC1001; 01-24-2021 at 05:38 PM..
Appreciate 0
      01-24-2021, 12:55 PM   #2
hC1001
Lieutenant
256
Rep
492
Posts

Drives: E36 M3, F80 M3
Join Date: Nov 2019
Location: Brooklyn, NY

iTrader: (3)

So i tried the CAF for SWE and it made no difference. Left side still fails during LED initializing process.

I no longer get a open circuit fault, its a LED headlight needs to be taught in(something of that nature) fault.

I now think it might be a electrical issue. Will check it out soon. Its just weird because during the initializing procedure, it turns all the lights on so they work but it quickly turns everything off after a couple seconds. Maybe its a bad module.
Appreciate 0
      01-24-2021, 05:41 PM   #3
hC1001
Lieutenant
256
Rep
492
Posts

Drives: E36 M3, F80 M3
Join Date: Nov 2019
Location: Brooklyn, NY

iTrader: (3)

The issue is the connector inside the headlight corner light housing was disconnected from the parking lights. I thought it was coding because during LED headlight initialization, it powered up the parking lights and i assumed it couldnt be wiring if it powered up.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:49 AM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST