ive been reading the other thread on the phoenix pd-175 and i have some solutions to some problems if needed.
For those people having problems with the alarm arming while the car is already started there is a white wire on the 7P that goes to the relay that came with the system. That wire also needs to be connected to the on position of the key cylinder along with the two brown wires from the starter module, but i connected it to the ACC of the key cylinder with the blue wire from the starter module.
If you are having troubles with the remote start trying to start the car every 10 sec you need to connect the oil pressure wire on the 7P wich is the red wire. If you cant find the oil pressure wire a good way to look is to disconnect one of the plugs going into the gauge cluster and use a light tester to figure wich wires output a 12volt source when the car is on and doesn't when the car is in the on position. it doesnt necesarily have to be the oil pressure wire but just any wire that turns on when the car is on and doesn't when the key is just in the on position with out having the car on.