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Old 02-28-2018, 10:08 PM
Join Date: May 2013
Location: Czech Republic
Car: e34 540i
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Default e90 cruise control retrofit problem

Hi guys,

I retrofitted cruise control(540) to e90 05/2006 with N52(MSV70) manual, but i have a problem. I changed SZL, add FA 540 to CAS, coded CAS,DSC,KOMBI(tried JBBF,DME too), then adjust steering angle sensor with DIS. No errors, but when try to activate it, when driving, it works for 1 second and then throws error in dme:
2D50 DME, internal fault: monitoring, cruise control
Torque request from cruise control despite brake signal
And cruise control can no longer be activated, when i clear error, the situation is repeated. Did i forget something ?
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Old 03-04-2018, 12:20 PM
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you need wire LDM , high kombi then szl with cc handle, and code using 544
540 only for 4 cylinder engines

Last edited by Silvestras1337; 03-04-2018 at 12:23 PM.
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Rawen (03-19-2018)
Old 03-26-2018, 07:02 PM
Join Date: May 2013
Location: Czech Republic
Car: e34 540i
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Default e90 cc retrofit

Thanks for the answer, i was afraid of that. So wanted to connect LDM unit, but guy is out of money But i still do not get it, why is 540 only for 4 cylinder...
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