Ideas for my ALP stuck in parking mode...

[BestRadarDetectors]

Nice troubleshooting. I had a feeling it was the faulty head causing it.

BTW, the self test runs regardless of whether you have the first warm-up disabled or not. The first warm-up just puts it in parking mode for 60 seconds so you can show a cop "hey it's parking sensors" by turning it on and letting them shoot/try it.

If you have the parking sensors/beeps enabled this is also a good way to test out heads,by seeing if they respond to obstacles as they should

But you're right, it would be nice if the ALP told you which head (on which port) was causing the error.

It does depending on the failure, Normally it will tell you which port has the error when the self check determines the problem. The issue here is the head is not ignoring the self check commands so it knows the head is attached and connected but its hanging up and causing the self check to stall causing it to stay in parking mode. The ALP unlike other systems will not start up and let you run it if there is an issue so if the self-check hangs or can not determine the error it will not put you into defense mode and give you a false sense of security. When the error is determined and we can get the bad head or cable back engineering will try to duplicate it and then add an additional routine to identity the failure if someone else in the future has the same problem.