Vehicle theft prevention device
First Claim
1. A vehicle theft prevention device including code obtaining means for obtaining a request code for requesting release of vehicle theft prevention control from a portable tool, memory means for storing a specific code allowing the release, control means for comparing the request code obtained and the specific code so as to release the vehicle theft prevention control when the request code obtained coincides with the specific code and to maintain the vehicle theft prevention control when they do not coincide, the vehicle theft prevention device, comprising:
- code changing means for changing specific codes at a predetermined changing time so as to invalidate a currently effective specific code so as to disagree with a request code from the portable tool; and
canceling means for canceling invalidation of the specific code, under specific conditions, wherein the canceling means receiving a canceling request code sent from a portable tool other than the portable tool which sends the request code.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle theft prevention device prohibiting release of a vehicle theft prevention control under a predetermined condition even when the control is applied using an authorized portable tool to thereby prevent the vehicle from running. Even when a vehicle ECU 14 controls to release theft prevention control applied by a theft prevention device including an engine control device 12a, a steering locking device 12b, and so on based on a specific code corresponding to a request code from an authorized portable tool 16, the specific code corresponding to the request code from the first portable tool 16 is invalidated upon receipt of a security request code. With this arrangement, an operation to release the theft prevention function of the theft prevention device is prohibited. Moreover, when release control is performed based another specific code (a security code) requiring a request code, vehicle theft can be prevented.
-
Citations
13 Claims
-
1. A vehicle theft prevention device including code obtaining means for obtaining a request code for requesting release of vehicle theft prevention control from a portable tool, memory means for storing a specific code allowing the release, control means for comparing the request code obtained and the specific code so as to release the vehicle theft prevention control when the request code obtained coincides with the specific code and to maintain the vehicle theft prevention control when they do not coincide, the vehicle theft prevention device, comprising:
-
code changing means for changing specific codes at a predetermined changing time so as to invalidate a currently effective specific code so as to disagree with a request code from the portable tool; and
canceling means for canceling invalidation of the specific code, under specific conditions, wherein the canceling means receiving a canceling request code sent from a portable tool other than the portable tool which sends the request code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A vehicle theft preventing device including code obtaining means for obtaining a request code for requesting release of vehicle theft prevention control from a portable tool, memory means for storing a specific code allowing the release, control means for comparing the request code obtained and the specific code so as to release the vehicle theft prevention control when the request code obtained coincides with the specific code and to maintain the vehicle theft prevention control when they do not coincide, the vehicle theft prevention device, comprising:
-
code changing means for changing specific codes at a predetermined changing time so as to invalidate a currently effective specific code so as to disagree with a request code from the portable tool; and
canceling means for canceling invalidation of the specific code, under specific conditions, wherein the specific condition is set by a specific combination of a plurality of manual manipulations of vehicle mounted devices. - View Dependent Claims (11, 12, 13)
-
Specification