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The BMW Range
3 Series
E90, E91, E92, E93
Learning to use an E90
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<blockquote data-quote="kimi yap" data-source="post: 569826" data-attributes="member: 22271"><p>Basically there are 3 type of OBD interface from E46 -> E90 LCI (i think same to other BMW series)</p><p></p><p>(1) Older E90 car (Pre 3/2007) or E46 - Communication through K-Line bus.</p><p>(2) Post 3/2007 - Communication through DCAN bus.</p><p>(3) >2009 - Communication through DCAN bus but also support Ethernet connection.</p><p></p><p>In the market, if you see </p><p>- K+DCAN cable, meaning it supports all models until 2009 car and DCAN cable doesnt support Pre 3/2007 car? Why we dont have 1 cable for all? The reason is, the same pin (pin 7 and pin 8) in OBD, are configured differently in pre 3/2007 and >2009 car. </p><p></p><p>- Pre 3/2007, Pin 7 & 8 is KLine bus.</p><p>- >2009, Pin 7 & 8 is Ethernet bus.</p><p></p><p>If we plug in a K+DCAN cable into your LCI, the KLine signal will interrupt the OBD interface as the LCI car treat it as Ethernet signal, so the software & OBD will not work properly. </p><p></p><p>Solution > To enable the K+DCAN to talk with your LCI, just disconnect the PIN 7 & 8 internally, everything will work fine. If want to talk to E46 or pre 3/2007 E90, just connect back the pins.</p></blockquote><p></p>
[QUOTE="kimi yap, post: 569826, member: 22271"] Basically there are 3 type of OBD interface from E46 -> E90 LCI (i think same to other BMW series) (1) Older E90 car (Pre 3/2007) or E46 - Communication through K-Line bus. (2) Post 3/2007 - Communication through DCAN bus. (3) >2009 - Communication through DCAN bus but also support Ethernet connection. In the market, if you see - K+DCAN cable, meaning it supports all models until 2009 car and DCAN cable doesnt support Pre 3/2007 car? Why we dont have 1 cable for all? The reason is, the same pin (pin 7 and pin 8) in OBD, are configured differently in pre 3/2007 and >2009 car. - Pre 3/2007, Pin 7 & 8 is KLine bus. - >2009, Pin 7 & 8 is Ethernet bus. If we plug in a K+DCAN cable into your LCI, the KLine signal will interrupt the OBD interface as the LCI car treat it as Ethernet signal, so the software & OBD will not work properly. Solution > To enable the K+DCAN to talk with your LCI, just disconnect the PIN 7 & 8 internally, everything will work fine. If want to talk to E46 or pre 3/2007 E90, just connect back the pins. [/QUOTE]
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Learning to use an E90
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