Thanks for the pics, it sounds like the driver side SAM module is going out, but this is what the manual says about the substitute lights.
Substitute lamp actuation
Function
The lamps and LED lamps for the exterior lights (ABL) are constantly monitored for short circuits and open circuits. In the event of a failure others are actuated, where applicable pulse width modulated.
The scope of the substitute lamp actuation is country-specific. Flashing functions have priority over continuous light.
An active automatic lamp substitution function is notified to the instrument cluster (A1) by the front SAM control unit with fuse and relay module (N10/1) or by the rear SAM control unit with fuse and relay module (N10/2).
Lamp failure indicator
A faulty lamp is indicated as text in the multifunction display (A1p13) of the instrument cluster.
Emergency lamp actuation
Function
Emergency light actuation is intended to avoid complete failure of the exterior lights (ABL) due to a fault, e.g. in case of failure of a processor.
In the event of failure of the interior CAN or of an SAM control unit, the following functions are activated within 1.5 s:
by the front SAM control unit
- Front standing lights actuation
- Front low beam actuation
by the rear SAM control unit
- Rear taillight actuation
- License plate illumination actuation
by the trailer recognition control unit (N28/1)
(for code (550) Trailer hitch)
- Trailer taillight actuation over trailer hitch socket (13-pin) (X58)
I would do a CAN scan which is easy you can get a CAN scanner from Amazon for about $30.00 here is a video to show you how.
https://youtu.be/u-4syLc-ifQ
Here is a scanner link:
https://amzn.to/3o41KcZ
Check out the diagrams below and let me know please. I am interested in seeing what's going on.
Images (Click to make bigger)
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Monday, August 22nd, 2022 AT 6:55 PM
