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Old 09-23-2021, 01:27 PM
Clavurion Clavurion is online now
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Originally Posted by andrewwynn View Post
That's interesting that with two axle air it uses doppelt front and back.

I wonder why they have dual sensors but maybe it works better to have a non linear resistor or reverse ramp for one system versus the other.

I have seen the voltage of the height sensor for air spring but never have seen the output of the headlight sensor option on my scanner.
The sensors are wired directly to EHC and LWR module which are located on opposite ends of the vehicle so it's reasonable that both systems have individual sensor circuits.

These sensors are hall sensors not potentiometers.

With BMW diagnostics (INPA, DIS or ISTA) you can see the headlight sensor voltage the same as EHC.
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
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