Yes, the car is manual and yes, the alarm has a specific method to activate MTS (Manual Tranny Start) mode. That procedure is ... to set the parking brake with engine running, keep door closed (unless using pit stop mode), release foot brake and within 20 seconds press the remote start button (on the key fob). The parking lights will flash 5 times to confirm remote start is active and the key fob will also say it. Turn off and remove the key, exit the car, and arm the alarm, the car will then turn off and the key fob will show a symbol stating MTS is enabled (and remote start should work).
Currently, the parking lights flash and remote start works until I exit and arm, then an error occurs and MTS turns off. Before, I used to be able to get MTS on and the symbol on my key fob, but when I hit remote start, nothing happened except an error.
The alarm's door trigger was tapped into the driver side wire. Is there a separate trunk trigger relay/circuit or is that tied into the door triggers, too? I don't have a trunk trigger hook up (the last owner had some work done that screwed it over and ripped the entire cable out).