bmw e90 adaptive headlight recenter using inpa

Physical check on startup with selector to the most right or on auto, I cannot see the leveling. Now in ISTA the AHL module is accessible. Result: steady, non blinking green LED next to the light switch -:D I replaced the AHL module and added the VO $524A. Issues with AHL ecu are quite common, so get a good used one or a new one, plug in, code, done.

What other “hints” do you need? Of course you should replace the AHL module, new stepper motors is a waste of money. You got an fault code that stated “No signal from AHL module…”, you got trouble acessing AHL module with inpa, you got a communication fault in ISTA. In addition in ISTA+ the AHL module is colored red and I also cannot read the AHL ECU: What should I first look for? Get a “new” AHL module or check for example the 2 height control sensors under the car? My car is from 2004 and the I believe the LMA controls, through the AHL, the stepper motors in the headlight. But when I get the headlight vertical aim control I get an error from INPA:

Through INPA I can access the: Light Module and check all the low beams, high beams, blinking lights etc etc. Bought new motors for in the headlight, doesn’t work but then I thought and read alot and now I am suspecting the AHL module (behind the glove box). The green light is blinking, in auto and in low beam setting and I have error E519 (Alive signal from ALC is missing). It does not move at all and there is no self check at startup. BMW E60 2004 year issues with my xenon headlight height adjustment.

Bmw e90 adaptive headlight recenter using inpa