Litronics - Retrofitting factory function

[KevinH1990]

I'm resuming my effort to retrofit the full factory function of the litronic headlights on my 2000 Boxster. As described in this thread: https://www.renntech.org/topic/44528-litronic-retrofit-question/?page=3 and the pdf I attached to that thread, I have retrofitted the hardware required for the factory system.

However, I am pretty sure the low beam headlights are not operating the way they do in the factory set up. The HID low beams do rotate when I turn them on and when I switch on the high beams. They do not appear to do anything to adapt to changing elevation of the road.

I'm contemplating the following as my next steps:

1. Connect pin #A9 (Diagnostic) on the litronic control unit to connection point (CP) 91. I believe that CP 91 corresponds to pin #3 on the OBD diagnostic port. See this wiring diagram:


This may allow me to use my Durametric to scan the litronic system to determine whether there are faulty components.

I'm not 100% confident that will work/enable diagnostics and I may also need to:

2. Find something with a PIWIS to code the ECU to recognize that the car has litronic headlights before I will be able to diagnose the system.

My questions are:

1. Does there seem to be a risk of damaging the car from connecting the diagnostic pin on the litronic control unit to pin #3 on the OBD port.

2. Are there any other connections needed? e.g. Do I need to connect the litronic control unit to the ECU? If so, how?

3. Does my idea make sense or am I wasting my time?

Thanks in advance for input.