I have purchased a patriot gsm/gps alarm system for my is300

[url="http://www.spy-equipment.co.uk/GSM_Alarm/gsm_alarm.html"]Alarm Specs[/url]

It has 4 remote circuits. I need one of the circuits to cut the engine power.
Does anyone have a suggestion as to which circuits I can cut into to allow the engine to loose power, without bringing on a engine management fault light.