How do I remotely cut off the vehicle's engine using the tracker?

Send the SMS command 'stop+password' to the tracker and it will reply 'Stop engine Succeed', keeping the vehicle immobile until a resume command is sent. By default, the engine will only stop when the vehicle speed drops below 20km/h; you can change this to immediate stop by sending 'quickstop+password'. To resume the engine, send 'resume+password' and the tracker will reply 'Resume engine succeed'.