Thanks for posting this, having the same code to deal with. Also being new to ISTA, it was helpful to see the workflow on the screens and how you use that to test on the car itself
Hi, your welcome. Please be advised the FRM module can be faulty if after replace height level sensor and code remains. I believe some FRM module can build corrosion from cabin moisture leading it abnormality/failure. Take care.
@@iTCXtreme Probably my issue. first i had issues with one low beam, then two. replaced frm-module 3 times, and all lights started working, however i got fault code on rear ride height sensor, which i replaced today, code remains. I'll try checking this, and try to reset short circuit in frm module if possible.
hey, i have similar problem and i replaced sensor first with second hand one but still not working properly, then bought new original one and this same situation, it read out 4.75 to 4.85 no matter what position sensor is in. Do You think it may be frm module fault?
Hello, FRM module controller is located bmw e90 front right footwell (UK). This controls light beam height based on the height of your car to avoid blinding oncoming traffic.
Hello, do you have any suggestion for DTC 9CB2 related to FRM module? Everything regarding front ligths works perfectly fine but can't get rid of that fault code. Thanks in advance.
Couple of things, an issue FRM module like corrosion or faulty component on the FRM pcb, firmware issues or wiring loom. If its the rear height sensor then check the wiring loom for any breakage as enter the rear boot as I believe the damage could be on the bend as it enters the boot and insulation on the wiring is damage and wire is exposed. Good luck.
@@iTCXtreme thanks for the possible solution. Since, 9CB2 headlight vertical aim cobtrol potentiometar.. It is related to FRM module but can't specify what coule be the reason for this, heh where to dig do you have an idea?
no, but you can try to calibrate the steering angle sensor. thats the cheapest thng to test first;) Worked on mine. And i had both fault. Next is to diagnose the ride hight sensor:)
4.90 is the Voltage when the ride height sensor is disconnected, when you connect the ride height sensor the arm creates some resistance and will lower the voltage from 4.9 to anything, but of course if the orientation of the height sensor is correct and the ride height sensor is working as it should then ISTA+ should show you that its within the two voltages it expects which was shown on the screen. If it falls out of those values then the ride height sensor is probably at fault.
Well, I believe if you remove it then the vertical movement of your headlights with no longer be functional, and headlights should sit on the the highest level. I don't see it being a issues but you will need to experiment it by removing and driving. Cheers
