Abstract: A security system for a vehicle includes a keyboard for receiving input codes that comprise user input codes and a start code. A processor is operably coupled to the keyboard for receiving signals indicative of each input user code and the start code, wherein the processor provides an output signal if an input user code corresponds to an user code and is followed by the start code. The processor also provides the output signal if the start code has been entered during an adjustable time period after the vehicle has been turned off. A controlled device is operably connected to the processor and controls a component of the vehicle to allow the vehicle to start when the output signal from the processor is received.

Abstract: An anti-theft system for a motor vehicle includes a portable code transmitter which transmits a code signal from a distance upon actuation. A receiver unit in the motor vehicle receives the code signal and evaluates it. Upon authorization, only the engine is started, but the vehicle does not have to be unlocked. A further code signal is required in order to drive the vehicle. However, it must be generated in the vehicle interior. Thus the engine can already warm up without the user being located in the vicinity of the vehicle.

Abstract: An electrical antitheft system for a motor vehicle inhibits the power supply to the ignition circuit of the vehicle, by preventing the engine from starting so long as the motor that actuates a blocking member of the antitheft system has not reached the unlocked position. The logic functions for controlling locking and unlocking of the system are obtained through a wired and protected logic system that connects the power supply terminals of the motor of the antitheft system to the poles of the battery through a pair of switches.

Abstract: An electrical anti-theft security system for a motor vehicle includes an immobilising device for inhibiting power supply to the starter of the vehicle so long as the motor, incorporated in the anti-theft system and arranged to drive a blocking member, such as a steering lock, has not reached the unlocked position. The immobilising device is also arranged to prevent the system from being locked unless the vehicle is at rest.

Abstract: An electrical control system for an automotive vehicle can be switched to a service facility operating mode in which locks for the glove compartment, a storage console and the trunk can be inactivated in their closed position while other electrically-operated vehicle locks remain operable by actuators of the control system to prevent access to personal belongings by service personnel. Restoration to the normal operating mode can be effected automatically upon lapse of a time period programmed into the central unit.

Abstract: A remote vehicle disabling and distress indicator system for a motor vehicle that is activated by an external telephone call or internally by one of two switches. The telephone call sends a signal received by a modular telephone stored in the vehicle that disables the vehicle by deactivating the ignition coil or substantially closing a fuel valve that controls fuel flow between the vehicle fuel tank and the vehicle engine. The signal also causes a distress sign at the top of the vehicle to be illuminated. In addition, the signal activates a tape machine that plays a prerecorded distress tape message through speakers that send a loud audible reproduction of the taped message internally and externally to the motor vehicle to attract the attention of any local population. The taped message may be any of a variety of messages, such as "HELP|", "CALL THE POLICE|", etc.

Abstract: An anti-theft system for a motor vehicle includes a portable transponder carrying an item of code information. A stationary antenna has a resonant circuit with components and a resonant frequency being determined by the components. An oscillator oscillates at an oscillator frequency and has an output variable being used as an exciter variable with an exciter frequency for compelling an oscillation of the resonant circuit. The oscillation is amplitude-modulated as a function of the code information of the transponder. An evaluation unit receives the oscillation of the resonant circuit. The evaluation unit detects the modulated oscillation and demodulates the code information out of the oscillation. A comparator compares the code information with command code information and supplies an enable signal if a match occurs. A security unit receives the enable signal.

Abstract: An antitheft system installed on a motor vehicle has an electronic control unit connected to a localization information detector and to a telephone apparatus, so that the control unit can produce a voice message and then transmit it directly to the police and/or to a security organization by means of the telephone apparatus, when a plurality of sensors detect certain conditions such as the theft of the vehicle. The message may also be sent by the system to a person authorized to use the motor vehicle by means of a transmitter-receiver radio and a portable transceiver radio. Voice messages are contained in a first mass memory unit, localization information derived from a second mass memory unit, the message selected on the basis of satellite signals received and decoded by the system.

Abstract: An apparatus and method for disarming an automobile alarm system uses the ignition switch of the automobile to create a sequential pulse access code. Toward this end, two commonly available electrical circuits in the vehicle's wiring that are switched on and of by the shifting of a vehicle's ignition switch among power-applying switch positions serve to supply a pulse code of sequential electric pulses to the alarm system to perform a selected function, including entering a valet mode or overriding and disarming the system without a remote control transmitter. Because the shifting of the ignition switch generates a two-wire detectable pulse code, previously-programmed pulse codes can be selected to perform different functions in addition to disarming the system, including using pulse codes to trigger entry of the system into a learning mode.

Abstract: A central-locking system is reset upon loss of a portable remote-control unit and replacement by another in a system in which a diagnostic device is temporarily connected and switched to the stationary part of the locking system into a "SETUP" mode. The key is then inserted into a key-operated switch to interrogate the transponder with the transceiver and from the latter the key-identification code word stored in the transponder and the transponder initial code word are transferred. The key-identification code word and transponder initial code word are stored in a code-word memory and the transmitter is then operated to send a remote-control changing code word to the receiver and enables switching back to the "NORMAL" mode of operation and removal of the diagnostic device.

Abstract: An anti-theft device memorizes the location of the vehicle when the engine stops, receives a signal peculiar to a vehicle (for example, from a key having a transmitter), and permits starting the engine when the received signal is identical with a predetermined code and the memorized location and the current location where the vehicle exists are within a predetermined range.

Abstract: A vehicle theft-prevention device which includes an ignition key having a transponder, a coil unit for supplying power to the transponder when the ignition key is inserted into the coil unit and then turned to a starting position thereby permitting the transponder to generate an identification code. The coil unit outputs the identification code to a disabling controller and the disabling controller outputs an engine drive signal when the identification code from the coil unit is valid and outputs an engine stop signal when the identification code is invalid. The vehicle theft prevention device also includes an engine controller for permitting an engine starting operation to continue when the engine drive signal is input into the engine controller from the disabling controller within a predetermined communication time period from a moment the engine starting operation is initiated by turning the ignition key to the start position.

Abstract: In an immobilizer and a method for initializing the immobilizer, a multiplicity of control devices, all of which must correctly signal back their identification code word before the vehicle can be started, are integrated in the immobilizer. If a control device is exchanged, the new control device must first be initialized. Key code words of two keys are necessary in order to do this. When both keys are accepted by a testing unit and a release signal is delivered to the testing unit through a diagnostics apparatus, the new code words are stored in the exchanged control device.

Abstract: An apparatus for repelling animals from an automobile is mounted in an automobile having an engine compartment and an automotive battery. A generator for producing vibrations which can be sensed by animals is mounted in the engine compartment. The vibration generator is wired to the automotive battery for supplying electrical energy from the battery to the generator. A switch is connected to the vibration generator to switch the vibration generator between an activated state, in which the generator generates vibrations, and a deactivated state, in which the generator does not generate vibrations. The switch may be connected to the ignition of the automobile to deactivate the generator while the ignition is activated, and to activate the generator while the ignition is deactivated.

Abstract: A security apparatus which automatically locks a door even though a door locking operation is not performed. A security controller drives a door lock device to automatically lock a door if the door is not locked even when a lapse of time exceeds a set time and if a detection signal is not output from a radar sensor after the door has been unlocked. With this arrangement, even when a driver unlocks the door intending to get in the vehicle, but decides not to do so, and also when he/she leaves the vehicle without performing an arming operation, the door can be automatically locked.

Abstract: A security system for monitoring a protected area and sounding an alarm including a plurality of sensors arranged about a protected area for sensing incoming threat, device for generating at least one pulse for each sensor activated by the incoming threat to the area, an alarm controller for receipt of the pulses and sounding of an alert, and a single wire connecting outputs of the sensors to the controller for transmitting the pulses generated by the plurality of sensors to the controller.

Abstract: An alarm device of an anti-theft system for a vehicle is composed of a microcomputer ordinary connected by a power-supply wire to a vehicle battery, an electric-sound-generator driven by the microcomputer, a wire-disconnection-detecting-circuit for detecting disconnection of the power-supply-wire of the alarm device from a vehicle battery, an integrated auxiliary battery connected to the microcomputer and the sound-generator, a transistor for cutting power supply to the microcomputer from the auxiliary battery when the anti-theft system is not on the watch, sensors for detecting access to the vehicle compartment and an outside controller connected to the sensors to turn on the transistor when the system is on the watch and turns off the transistor when the system is not on the watch. If the access to the vehicle compartment or wire-disconnection is detected while the anti-theft system is on the watch, the microcomputer drives the sound-generator to give the alarm.

Abstract: To provide a wireless vehicle control system having a compact receiver with small current consumption, a receiver includes a receiving circuit for receiving a modulated command signal from a transmitter, a demodulation circuit for demodulating and outputting the received command signal, and a power source control circuit for starting and stopping supply of power to the receiving circuit and the demodulation circuit. A control device in the system includes a CPU for issuing to the power source control circuit a signal instructing a start of supply of power, for subsequently discriminating the control signal received from the demodulation circuit and outputting a drive signal in accordance with a discrimination result thereof, and thereafter, for issuing to the power source control circuit a signal instructing a stop of supply of power; a drive circuit for receiving the drive signal and causing a door lock motor to be operated; and a power source supply circuit for constantly supplying power to the CPU.

Abstract: In an anti-theft warning apparatus in a trunk unlatching device for a vehicle, a drive switch is inserted between a trunk opener cancel switch and a trunk opener switch. The drive switch is activated so as to make an activation of the trunk opener cancel switch ineffective when an anti-theft warning function is set, i.e., an armed state is established in the vehicle.

Abstract: An anti-theft system for a vehicle which monitors a state of a memory storing a check code so as to maintain a prohibition of operation of the vehicle when an abnormal state is detected in the memory. A control unit, provided in the vehicle, has a memory in which a first check code is recorded. A transmitting unit transmits a second check code to the control unit. The transmitting unit is separate from the control unit. Prohibition of operation of the vehicle is withdrawn when the first check code matches the second check code. The withdrawal of prohibition is prohibited when it is determined that the memory is not connected to the control unit. The withdrawal of prohibition may be prohibited when a first ID code stored in the memory does not match a second ID code stored in a second memory provided in the control unit.

Abstract: A vehicle security device of the present invention comprising of a remote control, a receiver/decoder section, a CPU, and an amplifying section. It has been designed to arm in two ways--by remote control, and by timer. By pressing the button #1 of the remote control, the vehicle security device will be armed. The vehicle security device has two separate counters--the 10 minute counter, and the 30 second counter. No matter doors are close or open, the 10 minute counter will start counting after turning off ignition and will continue counting even if a door is opened while the 30 second counter will only start counting if any door of the car is opened and closed (provided all the remaining doors are close) but will stop counting if any door of the car is opened. The vehicle security device will arm itself if any of the two counters finished counting (whichever finished first). However, if the ignition is turned on during countdown, the car can be started and both counters will stop counting.

Abstract: A keyless entry system for use with a mobile transmitter for transmitting an ID code specified therefor along with a command for vehicle door lock/unlock remote control to a control unit. The control unit is operable in an ID code registration mode for registering an ID code transmitted from the mobile transmitter. The transmitted ID code is compared with the registered ID code to permit the remote control specified by the transmitted command when the transmitted ID code is identical with the registered ID code. Upon completion of a first predetermined procedure including a plurality of sequential events of at least one first movable vehicle member provided on the vehicle, a second movable vehicle member is changed from a first position to a second position.

Abstract: A motor vehicle immobilization system having an anti-theft control device (13) and a function control device (10, 11) which is released by a regular unlocking communication with the anti-theft control device (13). To permit simple maintenance of individual engine function units, the function control device (10, 11) has bypass means (204 through 220) which permit an atypical unlocking of the function control device (10, 11) by the external device (19). The bypass means (204 through 220) include a time-delay device (206, 218) which, during atypical unlocking, only releases the function control device (10, 11) after the passage of a predetermined delay time (T.sub.F).

Abstract: A motor vehicle has a detector for detecting the presence of a valid radio frequency transmitter only within a seating space inside the vehicle. Start control circuitry is responsive to a RUN signal, provided that the detector has detected the presence of a valid radio frequency transmitter within the seating space, to unlock a steering column lock, activate an engine electric power circuit and a start motor, repeatedly receive an engine speed signal from the engine speed signal generator and compare the received engine speed signal to a predetermined speed reference indicating engine starting. The start motor is deactivated and a park lock solenoid is activated when the engine speed signal exceeds the speed reference. Alternatively, the engine electric power circuit and start motor are deactivated and the column lock is locked if the engine speed signal does not exceed the speed reference within a first predetermined time.

Abstract: A security system uses an ordinary switch, which may be an existing switch such as a parking light switch, to enter digits of a security code, with the beginning of a digit being indicated by turning on the ignition switch and the end of a digit being signified by turning off the ignition switch. Entry of the security code can be used to perform an emergency system disarm when the remote control transmitter is lost, to change the security code when the transmitter is in the possession of the owner, and to teach a new transmitter.

Abstract: A central locking system for a motor vehicle which has a number of actuators, each of which has a signal transmitter unit which sends data signals to a control unit as a function of current condition parameters of a monitored opening of the motor vehicle or as a function of externally input command signals, and the control unit generates control signals from these data signals, and final control elements of the central locking system, which bring about the locking and unlocking of the opening of the motor vehicle, are triggered by these control signals. According to the present invention, each actuator of the central locking system has a separate control unit to which the data signals of the signal transmitter unit of its actuator, as well as selected data signals of the signal transmitter units of the other actuators of the central locking system are sent.

Abstract: An antitheft device is provided for a vehicle such as a tractor/trailer combination, with an engine operable to develop pneumatic pressure in a reservoir during operation of the engine, and a pneumatic conduit leading from the reservoir to an operational load, preferably a brake release mechanism. The antitheft device preferably has at least two controllable valve along the pneumatic conduit, each with at least two positions including a first position at which the pneumatic conduit is open through the valve from the reservoir to the operational load, and a second position at which the fluid conduit is closed between the reservoir and the load by the valve means to disable the operational load. Air pressure is diverted at the valve to a branch coupling the reservoir through to an alarm such as an air horn. The antitheft device can be included in a tractor or a trailer, and preferably valves and alarms are provided in both.

Abstract: An electrically-operated system for the locks of a motor vehicle as a remote controller with a multifunction push button which, when first operated, locks the vehicle doors and sets a time window open within which a second actuation of the button will provide the antitheft mode. This arrangement allows a single push button to be used for both locking and antitheft operations.

Abstract: A code locking mechanism that transmits information between a key and a locking mechanism secured against interception misuse, but flexible with respect to original equipment, replacement parts, and emergency functions, is obtained if the key code is, in each case, cryptographically encoded through a hardware encoder. When the locking mechanism is first operated, a control element, inductively coupled to a locking mechanism read-write unit with a new key once and in a non-overwritable manner, transmits an indent number to the object memory. Object-specific identity data are also stored in the control element. With the latter, a key number from a key register of the control element is combined with the key code to read the latter together with a roll-in random code into the set of first still-neutral keys and into the object memory. Thus, a key is valid only if the object-specific identity data are taken into account in its key code.

Abstract: An anti-hijack security system which automatically protects the vehicle with anti-hijack after the ignition has been turned off for a predetermined long period of time or after the ignition has been turned off and a door has been opened and closed for a predetermined short period of time. Thus, ensuring the owner to have anti-hijack protection when he returns to his vehicle. The anti-hijack protection system also makes sure that, once triggered, it will perform the anti-hijack trigger sequence even if a door sensing device is damaged or if a door is not closed properly. The system also makes sure that once anti-hijack trigger sequence is in it's last few stages, it cannot be disarmed by simply pressing the arm/disarm switch but can only be disarmed by entering a security code.

Abstract: A control system for electrical components of a motor vehicle has an emergency battery and emergency circuitry which, when the starter battery fails, connects the control unit to the emergency battery and cuts off comfort functions like window lifters while allowing the basic control mode to operate in which door locks, a theft alarm and a lid lock for the compartment containing the starter battery remain operative.

Abstract: An anti-theft device for a motor vehicle includes a key having a transponder. A lock has a keyhole for receiving the key. An antenna is in the vicinity of the lock. A control unit for controlling the antenna sends starting signals to the transponder and receives answer signals from the transponder. An assembly is turned on or off if the answer signals correspond to set-point signals. The antenna has a lighting device being controlled by the control unit for illuminating a region around the keyhole, at least before the key is inserted.

Abstract: An asynchronous serial communication device in which data transmitted at different speeds coexist and are exchanged. Time losses when errors are generated are effectively eliminated when asynchronous serial data communications for diagnostic failures are performed between a diagnosing tool and an electronic controller via a communications line. In performing the data communications, first data are exchanged between these devices at a low transmission speed and then by switching the speed to high speed various data are exchanged. In a case where communication errors are generated during exchanging, the operation is started again from the data exchanging at the low speed. Here, the edges of the data sampled at the low speed are detected by an edge detecting terminal provided in a communication circuit. A communication error is identified when a difference between a first edge detecting time and a next edge detecting time is shorter than 1 bit time of the low transmission speed data.

Abstract: A device for controlling keyless access to a motor vehicle includes a transceiver to be carried by a user. A distance detecting device measures a distance between the transceiver and a motor vehicle. A transmitting unit being disposed in the motor vehicle and being associated with a tripping device broadcasts a question code signal when the tripping device is actuated. The transceiver has a receiver for receiving the question code signal, and the transceiver has a transmitter for broadcasting an answer code signal only whenever the motor vehicle is located in the immediate vicinity of the transceiver. A receiving unit disposed in the motor vehicle receives the answer code signal from the transceiver and furnishes an unlocking signal to an unlocking unit if the answer code signal matches a set-point code signal.

Abstract: An arrangement for identifying a movable object includes a transponder disposed on the movable object and including an electrical memory that can be read out in a wireless manner by an electrical interrogating device which is disposes in proximity of the object. A sensor arrangement is disposed on the object and electrically linked to the transponder for writing a read-out-capable status information into the memory in response to irregular or unauthorized use of the object.

Abstract: A vehicle security system includes a vehicle security sensor and associated sensor bus interface, an alarm indicator and associated alarm indicator bus interface, and an alarm controller and associated alarm controller bus interface for interfacing the alarm controller. The vehicle security system is for a vehicle of a type including a data communications bus connecting a plurality of vehicle devices. The security system preferably further includes a desired signal enabling circuit for enabling the alarm controller to operate using a set of desired signals for a desired vehicle from among a plurality of possible sets of signals for different vehicles. Accordingly, the desired signal enabling circuit permits the alarm controller to communicate with the vehicle security sensor and the alarm indicator via the data communications bus so that the alarm controller is capable of operating the alarm indicator responsive to the vehicle security sensor.

Abstract: The vehicular access controller includes input means for detecting an indicia of identity of a prospective user and central station control means for comparing the indicia of identity with an indicia of identity of an authorized user. The controller further includes activating means for activating the vehicle when the control means determines that the indicia of identity from the input means substantially matches the indicia of identity of the authorized user.

Abstract: An anti-theft device for a vehicle includes a control configuration having a first terminal for outputting a lock signal and a second terminal for outputting an unlock signal. The device also includes a push-pull gear motor having a first terminal connected to the first terminal of the control configuration and a second terminal connected to the second terminal of the control configuration. The motor has an actuator movable between an extended and a retracted position upon receiving the signals. The anti-theft device further includes a pivotal locking device connected to the actuator. The pivotal locking device is in a locked position when the actuator is in one of the positions and is in an unlocked position when the actuator is in the other of the positions. The locking device engages a first end of an operative connection when the locking device is in the locked position.

Abstract: A method of resetting a central lock system of a motor vehicle automobile connects a diagnostic device to a fixed part of the system. When the central unit is switched to the "SETUP" mode, the key of a new portable unit is inserted into a key-operated switch to interrogate a transponder of the portable unit, a transponder querying transceiver of the fixed unit to derive a key-identification code word which is stored in the transponder and in a memory of the transceiver. The transmitter is then operated to send a remote-control changing code word which progressively changes in the transmitter, to the receiver. The latter picks up the then-effective remote-control changing code word and stores it in the transceiver and transponder code word storage memories as a new transponder changing code word. The fixed unit is then switched back to its "NORMAL" mode.

Abstract: The invention provides a device for protection against unauthorized use of a motor vehicle, in which usage authorization information is transmitted electromagnetically, at preset time intervals, by a transmitter in a predetermined vehicle usage area. A usage control device aboard a vehicle keeps an operational critical vehicle assembly or assemblies that are operationally essential in operational readiness after a usage signal is received for only a predetermined subsequent period of time, and blocks further operation if further usage signals are not received within the predetermined time period.

Abstract: An anti-theft car protection system comprises a transmitter-receiver for receiving a code of the key, an immobilizer unit for collating said code as received with a code as registered and transmitting an engine start permission signal to an engine control unit when said code as received coincides with said code as registered, and means, cooperating with said immobilizer unit, for removing repetition of key operation upon start of the engine.

Abstract: An antitheft apparatus for an automobile includes an engine starting key storing an identification code allocated inherently, a code reading circuit for reading out the identification code from the engine starting key inserted in a key cylinder installed on the automobile, a code collating circuit for collating the identification code supplied from the code reading circuit with a verification code stored previously, and an engine start decision circuit for enabling engine starting operation when the identification code coincides with the verification code, while upon occurrence of a discrepancy between the identification code and the verification code, for enabling the engine starting operation only when a door or accelerator pedal of the automobile is actuated in a predetermined manner. The automobile can be operated even when the key is lost or damaged and the identification code is unavailable.

Abstract: A vehicle safety automatic braking apparatus having a driver seat weight sensor, a velocity sensor, an emergency brake actuator, and an engine kill switch which are interfaced with a controlling microprocessor. A microprocessor monitors the weight sensor and velocity sensor and, upon detection of the weight in the driver's seat falling outside a predetermined range and the speed of the vehicle being below a predetermined threshold, the emergency brake actuator and engine kill switch are activated to arrest motion of the vehicle.

Abstract: A method of disabling a motor vehicle, comprising the steps of, firstly, providing an apparatus for disabling a motor vehicle which includes a plinth-like base small enough to fit in the palm of a person's hand. The base has a first substantially planar surface and a second substantially planar surface. At least one spike receiving aperture is provided in the first planar surface. At least one hollow tubular spike is removably secured in the at least one spike receiving aperture. The spike protrudes from the first planar surface at an angle of between 55 and 90 degrees. Secondly, positioning the plinth-like base under a tire of a motor vehicle with the at least one spike pointing toward the tire, such that upon the tire rolling over the plinth-like base, the at least one hollow tubular spike is transferred from the base to the tire, puncturing the tire and thereby serving as a conduit for the gradual escape of air to deflate the tire.

Abstract: An anti-theft apparatus prevents a delay in engine start caused by an ID legitimacy determination performed by an immobilizer. When an ignition key is operated, a starter motor is immediately energized and an engine control unit and a theft detector are actuated at the same time. Then, when independent running of the engine is detected by a detector, an immobilization determining section determines whether an enable code has been provided from the theft detector. If no enable code is present, then the immobilization determining section issues a halt command to the engine control unit. Thus, as soon as the key is turned to the on-position, the engine is started, thereby preventing a delay in engine start caused by the ID determination performed by the immobilizer.

Abstract: A security system for an automotive vehicle having an engine is operatively connected between engine running electrical components that are connected to an electrical power source and a lock switch having at least two operative positions. The security system has a key with a memory device carried thereon with a first security code stored in the memory device. A theft control module having a memory storing a second security code is operatively connected between the switch and the engine running electrical devices. The theft control module operates to first permit the engine running electrical components to enable the starting of the engine and then to compare the first and second security codes. Before starting the engine, a counter is compared to a predetermined number so that the engine starting is limited to only a predetermined number of attempts. The engine is disabled if the number of attempts exceeds the predetermined number.

Abstract: An anti-hijack system which includes a nozzle arranged to be normally hidden from view mounted on the front section of a vehicle in the window well of the front windshield in such manner that the spray therefrom will impinge upon a person outside the vehicle and in the vicinity of the driver's door. As an alternative this can also be for both the driver's side and the passenger's side. The nozzle includes a diverter positioned to provide both cone and flat patterns of spray according to the arrangement thereof, and a spiral fluid director is positioned to effect the fluid spray as it ejects from the nozzle. There is a reservoir of incapacitating fluid adapted for mounting on a vehicle and hidden from view and a pump for forcing fluid from the reservoir through the nozzle under pressure to spray the fluid outwardly of the nozzle. If desired, a hot cap type capacitor can be used to provide voltage regulation so that vehicle voltage is always available for energizing the pump.

Abstract: A centralized lock system for a motor vehicle, provided with a system-specific identity code word which is stored in memories of the satellite processors associated with the door locks as well as in the code word storage memory of the central processor and the code words are transmitted back and forth along the base or line connecting the electronic controller with the door locks. An identity test is effected at these memories and upon failure of the identity test, the door lock and/or electronic controller or all of the door locks and preferably also the electronic controller are deactivated. This prevents ready replacement of the components since the system will not recognize a foreign component and deactivation will occur upon an attempt to substitute a foreign component for one of the original family of components of the system.

Abstract: A secondary ignition switch system that connects to a conventional ignition switch system of a vehicle to provide a security function. The secondary ignition system includes a dashboard mounted double-pole-double-throw (DPDT) switch and a key operated secondary ignition switch. The DPDT switch controls the operation of the primary and secondary ignition switches. To start the engine the DPDT is set to a position to power the secondary ignition switch, such that the engine can be started by turning a secondary key. However, based on the interconnection of the ignition switches the steering column of the vehicle remains locked. Only until the operator uses the primary key to unlock the steering assembly can the car be driven. This system enables the engine of a vehicle to run including powering the accessory circuit (for heating/cooling and power accessories) to warm a vehicle in cold climates with minimized risk since the steering assembly remains locked.

Abstract: An enabling device for a motor vehicle having an electronic ignition system including an engine control circuit for controlling the electronic ignition system of the motor vehicle, a hardware limited operating system for controlling the electronic ignition system, a latch electrically connected to the control circuit to enable the electronic ignition system, and an override circuit electrically connected to the latch and the hardware limited operating system to enable the hardware limited operating system.