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AUC sensor still giving error after replacement

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Old 11-01-2020, 11:56 PM
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Originally Posted by scottalexander
Was pin 2 bent?

Was pin 2 corroded?

What was going on with pin 2?
Pin 2 doesn't give 12v+ from ihka after facelift so the auc sensor doesn't get power, after facelift it gets power from distribution block.
Pin2 from ihka goes directly to auc sensor.
Old 11-02-2020, 06:56 AM
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Do you have any other errors? I had a blown fuse on my LCI, a fuse that runs AUC sensor, Grille flaps and some other option i cant remember...
Fuse location is inside the DME/DDE box under the pasenger pollen filter
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Old 02-05-2021, 01:09 PM
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Default Lci wiring in IHKA 11 but pre lci 12 inside the control panel

Originally Posted by Stian.k
Hi.

My IHKA gives alarm 9C 54 64, I bought a new sensor and still I get the error, I then checked wiring and all 3 wires going to sensor is ok.
Also noticed problem with solar sensor(0x3d3) E720
IHKA is from E65 I believe had to upgrade to lci due to NBT retrofit.
Could there be something missing in programming?
BMW 520i E60 2004


Old 11-29-2021, 04:40 AM
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Hi guys !

I have the same pb about solar sensor(0x3d3) E720 after a NBT Retrofit on my Pre-LCI E60.
​​​​​​​20210905_154018_FaultCodeDetails_VIN7-CP14746.pdf

I have carefully readen the post but I don't understand how do you fix the pb. On my pre-LCI E60, when I disconnect the blue connector from the IHKA, I haven't a wire on the PIN 2.


But when I have a look to the wiring diagram of Adv Ghaith Obeidat on PRE-LCI, there is a wire into this PIN.

So this is what I did : I took a +12V and connected it into the PIN 2 of the blue connector => no result, the error with RLS and solar sensor is ever here.
I don't know how supply in voltage the RLSS sensor (Rain/Light Sensor + Solar Sensor)



Someone for help me ?
Old 11-29-2021, 08:54 AM
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Hi girls and guys !

I have the same pb about solar sensor(0x3d3) E720.

I have carefully readen the post but I don't understand how do you fix the pb. On my pre-LCI E60, when I disconnect the blue connector from the IHKA, I haven't a wire on the PIN 2.


But when I have a look to the wiring diagram of Adv Ghaith Obeidat on PRE-LCI there is a wire into this PIN.

So this is what I do : I took a +12V and connecte dit into the PIN 2 of the blue connector => no result, the error with RLS and solar sensor is ever here.



Someone for help me ?
Old 11-29-2021, 09:52 AM
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I'm confused are you having issues with your AUC or your solar sensor
Old 11-29-2021, 12:30 PM
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Here is the fault code I get.
Attached Files
Old 11-29-2021, 12:45 PM
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In rerouting the PIN 2, Stian fixed the pb and its error E720 about solar sensor(0x3d3) disappeared.
So I suppose that if I do the same it will be fine for my case.
Old 11-30-2021, 12:03 PM
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But I don't understand how do you fix the pb. On my pre-LCI E60, when I disconnect the blue connector from the IHKA, I haven't a wire on the PIN 2.


But when I have a look to the wiring diagram of Adv Ghaith Obeidat on PRE-LCI there is a wire into this PIN.

So this is what I do : I took a +12V and connecte dit into the PIN 2 of the blue connector => no result, the error with RLS and solar sensor is ever here.



Someone for help me ?
Old 11-30-2021, 12:19 PM
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It gets the power from the DME. Did you test to se if the sensor connector was getting power. It should be. That will tell you if it's a fault down the line or the sensor itself. I have an 05 pre-LCI and mine gets power from the DME. You may have a bad sensor

Last edited by seanjordan20; 11-30-2021 at 12:22 PM.


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