Patent ID: 7348877

Claim:
A prompting system for an on-vehicle wireless communication module of a car after parking in a poor communication quality environment comprising: an ignition switch; a security controller settable between an alert mode and a non-alert mode; an in-car computer electrically connected to the ignition switch and the security controller, the in-car computer including a memory module, the memory module storing a receiving quality default value; and a wireless communication module electrically connected to the in-car computer; wherein when the ignition switch is switched off and the security controller is set into the alert mode, the in-car computer starts the wireless communication module to detect the receiving quality for obtaining a detecting signal result to which the in-car computer compares the receiving quality default value in the memory module; the in-car computer sets a prompt index and stores the prompt index in the memory module if the value of the detecting signal result does not surpass the receiving quality default value; wherein when the ignition switch is switched on again, the in-car computer checks whether the prompt index in the memory module has been set or not and then provides a poor communication quality prompt message if the prompt index has been set.