2013年6月13日 · Another approach is to open up the LCM and find out which circuit controls the turn signal in question. Then track it down to that mosfet/chip and replace that chip. Info on LCM pinout is below.

2017年7月25日 · Procedures of Repairing BMW LCM: 1.Disconnect the battery cables. 2.You will locate the LCM under the right trim panel. 3.You need an 8mm tool to unscrew the LCM. 4.Disconnect the 3 connectors on the LCM. 5.Open up the LCM. 6.Open the tension clips which hold the transistors against the cooling flange. 7.Unscrew the cooling flange

2021年3月1日 · The BMW light control module, commonly known as the LCM, lamp control module, or light check module, is an extremely common part that fails on the BMW E38 and E39. What is it, how does it work, and why does it fail?

2017年9月25日 · Morning everyone, my dad asked me to look into the headlights on his 2001 540i staying on - seems the light control module is definitely the culprit. I've done some searching and found a ton of different answers. I know the new module will need to be recoded to his car - but can a used lcm from another vehicle be used?

2018年6月14日 · I have a '97 528i E39 that came from the factory with the BMW LCM II unit. I'm recently running PASoft 1.4 software ( for diagnostics and coding ) …. and found that the LCM II module would not allow access or coding (to …

2022年8月15日 · I originally pasted this on the e39 forum but suspect more appropriate here. I have some questions on LCM programming for my 2001 540.6. I replaced my LCM III with a IV off ebay. All good. I've set out the steps I used below in case helpful to anyone. There are now three things I would love to code. Have searched endlessly and not found clear ...

For the 2001 + years e39, the part is called LCM III, I believe. It doesn't have the protruding heat sink. There 2 p/n: One is for factory equipped HID...

2019年11月6日 · 如果是e39前期的車子只要並連一個電容就可以升級hid的燈具.. 如果是小改後的車子，原廠的LCM內就已有裝HID的功能，只要coding把它開啟就可以了! 拍謝，BMWCCT站長就是我.

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An LCM IIIB or IV is required for automatic headlights. The LCM IIIB took over for the IIIA from 9/1/2001 production. All of the connectors and pin-outs are the same, so a swap is physically ‘plug and play’. However, the LCM is one of a few body modules that stores the vehicle’s mileage.