JP3446191B2 - Initial setting device for vehicle anti-theft device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an initial setting device for a vehicle antitheft device.

[0002]

2. Description of the Related Art In recent years, theft of vehicles has become frequent in various countries. Therefore, conventionally, many anti-theft devices have been proposed to prevent the theft,
It is installed in the vehicle. As a system similar to such an anti-theft device, for example, as disclosed in Japanese Patent Publication No. 6-57524, a means for collating a mechanical key and a means for collating an electronic code with a preset regular code. In addition to the above, the electronic code collating means has a keyboard input means for inputting a personal identification code on the vehicle side, and only when the mechanical key and the electronic code both match within a predetermined time By enabling the engine to start, vehicle theft can be reliably prevented, and a transmitter is not required.Therefore, there is a device that improves the antitheft effect for those who try to steal by entering the PIN code by trial and error. Proposed.

A recent anti-theft device is composed of an immobilizer unit and an EGI unit. The immobilizer unit collates a code unique to a key, and if the collated result does not match, an ignition switch is turned on. However, some EGI units are configured so that the engine cannot be started. In this system, the immobilizer unit has an ignition power source and a battery power source, the system power source is turned on when the ignition is turned on, and the code is not communicated between the immobilizer unit and the EGI unit unless the engine is started once, When the ignition switch is turned off, the function is set and the engine cannot be started.

[0004]

However, in the conventional example configured as described above, for example, Japanese Patent Publication No. 6-
The technique disclosed in Japanese Patent No. 57524 has a keyboard input means in addition to a code input by a key, and when the key device having a transmitter or the like has a malfunction, the personal identification number can be input with the keyboard. It is necessary to separately prepare a keyboard for, which has the disadvantages of poor portability and high cost.

In the latter conventional system, the code is set not to be communicated between the immobilizer unit and the EGI unit unless the engine is once started. When the code is registered in each unit after the unregistered units are assembled in the vehicle, it is necessary to start the engine one by one and register the code in each unit in this system. However, it is very inefficient to start the engines one by one in the factory production line.

Therefore, the initial setting device of the vehicle antitheft device of the present invention has been made in view of the above circumstances, and its purpose is to set it in a factory line.
It is an object of the present invention to provide an initial setting device for a vehicle antitheft device that can newly register a unique code of a key without starting an engine for each vehicle.

[0007]

In order to solve the above-mentioned problems and to achieve the object, an initialization device for a vehicle antitheft device of the present invention has the following configuration. That is, the first code unique to the transmitter is received from the transmitter side based on a code transmission request from the engine control unit, and the first code unique to the transmitter and the code stored in the receiver side are received. Collate,
When the code determination unit that outputs the second code to the engine control unit when they match, the second code and the code stored in the engine control unit are collated, and if they match, engine start is permitted. An engine control unit, wherein the engine control unit determines the code for the first code in a vehicle anti-theft device that requests the code determination unit to transmit the second code in response to an engine start. A first antitheft device for a vehicle for registering the first code and the second code with the engine control unit, and forcing an engine start state to the engine control unit. It is equipped with a compulsory means to be generated.

Further, preferably, the first code unique to the transmitter is received from the transmitter side based on the code transmission request from the engine control unit, and the first code unique to the transmitter and the receiver side. And the code stored in the engine control unit, and the code determination unit that outputs the second code to the engine control unit when the two match. In an anti-theft device for a vehicle, the engine control unit is configured to permit engine start in the case of doing, and the engine control unit requests the code determination unit to transmit the second code in response to engine start, An initial setting device for a vehicle anti-theft device for registering the first code in the code determination unit and registering the first and second codes in the engine control unit. Comprising a pseudo signal generating means for transmitting the engine start pseudo signal indicative of engine starting condition to the engine control unit.

[0009]

As described above, since the initial setting device for the vehicle antitheft device according to the present invention is configured, a new unique code of the key is newly provided in the code judging section and the engine control section in which the code is not registered. When it is desired to register the key, the unique code of the key can be newly registered without starting the engine for each engine, and the production efficiency can be improved.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a system block diagram of a vehicle antitheft device according to an embodiment of the present invention.
The configuration of the vehicle antitheft device according to the present embodiment will be described with reference to FIG. As shown in FIG. 1, a vehicle antitheft device used in this embodiment includes a transponder 1, an antenna 2 that receives a signal from the transponder 1, an amplifier 3 that amplifies a signal captured by the antenna 2, and an amplifier. It is a system including an immobilizer unit 4 controlled by a signal from the EGI unit 9 and an EGI unit 9 for controlling the engine. Specifically, the transponder 1 is
It is built into the key that turns on / off the ignition switch of the automobile on the driver side. Further, the antenna 2 is an ignition coil antenna that operates in conjunction with turning on and off of the ignition switch. In the amplifier 3, when this coil operates and a voltage is applied, the voltage is amplified to a constant value in order to obtain a high voltage.

The immobilizer unit 4, which is called an immobilizer unit, is a controller for prohibiting engine start by EGI, which has recently been developed for theft prevention in Europe. By turning off the ignition switch when the vehicle gets off the vehicle. It is set automatically. Immobilizer unit 4 has battery power (+ B) 14
Also, ON / OFF information of the ignition switch is given based on the switch power supply (IG1) 15, and ID data is given from the transponder 1 based on the voltage value amplified by the amplifier section 3 to send a predetermined control signal E
Send to GI unit. Furthermore, the Immobilizer unit 4
Since the battery is connected to the battery power source 14, for example, even if the engine is stopped and the ignition switch is turned off, the power is supplied and the standby state is maintained. In addition, connected to the indicator 16 provided in the passenger compartment,
Flashing and extinguishing are controlled by ID data transmitted from the transponder.

The EGI unit is a controller for controlling the engine speed, the fuel injection amount, and the like. Also, EG
The I unit 9 has an EEPROM 10 that stores data in advance, a RAM 11 that temporarily stores data when exchanging data with the immobilizer unit 4, and a data stored in these memories, as in the configuration of the immobilizer unit. 1 that sends the timing of sending and receiving data as data
2. A CPU 13 that controls the exchange of data with the immobilizer unit 4 based on the timing information from the timer 12. Further, the EGI unit 9 receives a predetermined control signal from the immobilizer unit 4, and controls the starter, the fuel injection amount, etc. based on the signal. Also, EGI
Unlike the case of the immobilizer unit 4, the unit 9 operates as the switch power supply 15 while interlocking with the turning on and off of the ignition switch. Therefore, for example, when the engine is stopped and the ignition switch is turned off, the power is turned off. Become.

Next, with reference to FIG. 2, a procedure for transmitting / receiving data to / from the transponder 1, the immobilizer unit 4, and the EGI unit 9 will be described. FIG. 2 is a diagram illustrating a procedure for determining ID data of the transponder 1 having certain unique ID data. In the following explanation,
From the transponder 1 to the immobilizer unit 4, an ID code representing a unique code of the key is transmitted, and from the immobilizer unit 4 to the EGI unit 9, a codeword (hereinafter,
A password called "CW" is transmitted.
A codeword is a code registered in the immobilizer unit 4 and the EGI unit 9 one by one, and the same codeword is registered in each unit.

<Determination and Registration of ID Code> In FIG. 2, when the transponder 1 is inserted into the key hole and the ignition switch is rotated to operate the engine,
The EGI unit 9 issues a CW request to the immobilizer unit 4, and in response, the immobilizer unit 4 issues an ID request to the transponder 1 and the transponder 1
Transmits an ID signal which is a trigger signal of the immobilizer unit to the immobilizer unit 4. The immobilizer unit 4 temporarily stores the transmitted ID code of the transponder 1 in the RAM 6 in the unit. After that, the CPU 8 outputs the ID code registered in the EEPROM 5 in the immobilizer unit and the ID code transmitted from the transponder 1.
Check in. The immobilizer unit 4 transmits an engine operation permission signal (immobilizer function cancellation command) and CW to the EGI unit 9 if the ID code comparison results match. If they do not match, an engine operation stop signal (immobilizer function setting command) is transmitted, and the EGI unit 9 receives the signal and stops the engine. The EGI unit 9 stores the CW from the immobilizer unit 4 in the RAM 11, and the CW from the immobilizer unit 4 and the EGI unit 9 are stored.
CW registered in the EEPROM 10 therein is checked, and if they match, the engine is continuously operated, and if they do not match, the engine is stopped.

3 to 5 are IDs on the immobilizer unit side.
It is a flowchart which shows the determination procedure of a code. Figure 3,
As shown in FIG. 4, when the processing is started and the ignition switch is rotated to the ON position by the key incorporated in the transponder, the immobilizer function release determination waiting state is entered, and the engine start mode is temporarily permitted. After that, in step S2, it is determined whether the ignition switch is rotated to the starter position by the key incorporated in the transponder and the engine is started. When the engine starts (determination in step S2 is YE
S), the process proceeds to step S4, and when it is determined that the program has not started (NO in step S2), the process returns to the start point of the program. In step S4, it is determined whether or not a predetermined condition (a stable state at an engine speed of 500 rpm and a voltage of 10 V or more) is satisfied. Step S4
If the predetermined condition is satisfied (YES in step S4), the process proceeds to step S6. On the other hand, step S
If the predetermined condition is not satisfied in step 4 (NO in step S4), the process returns to the start point of step S4. In step S6, it is determined whether or not a CW request has been issued from the EGI unit side. When it is determined in step S6 that the CW request is issued (YES in step S6), the process proceeds to step S8. Also, step S
When it is determined that the CW request has not been issued in step 6 (NO in step S6), the process returns to the start point of step S6. Then, in step S8, step S
According to the CW request in 6, the ID request is issued to the transponder. Then, it progresses to step S10. Step S
At 10, I from the transponder that issued the ID request
It is determined whether or not a D response has been received, and if a response has been received (YES in step S10), step S12
If no reply is received (NO in step S10), the process proceeds to step S40 described below.

In step S12, it is determined whether or not the ID code is registered in the EEPROM incorporated in the immobilizer unit. Immobilizer unit E in step S12
If the ID code is not registered in the EPROM (NO in step S12), the process proceeds to step S30. In step S30, the ID code is temporarily stored in the RAM of the immobilizer unit, and then in step S32, the ID code and CW are EG together with the ID unregistered command (IE command).
Send to I unit. After that, the process proceeds to step S34, and it is determined whether or not there is a response to the transmission of the ID code and CW from the EGI unit. EG in step S34
When there is a response from the I unit to the transmission of the ID code and CW (YES at step S34), the process proceeds to step S36. In step S36, the response from the EGI unit is OK (that is, the transponder ID and EG
If the IDs registered in the I unit are the same), the ID stored in the RAM of the immobilizer unit is registered in the EEPROM, and then the process goes to step S38 to turn off the indicator. In addition, the determination in step S34 described above is N
In the case of O, the process returns to the start point of step S34.

If the ID code is registered in the EEPROM of the immobilizer unit in step S12 (YES in step S12), the process proceeds to step S14 shown in FIG. In step S14, the ID transmitted from the transponder is compared with the ID registered in the immobilizer unit. Then, in step S16, it is determined whether or not these IDs match, and if they match (YES in step S16), step S1
8, the process proceeds to step S20 if they do not match (NO in step S16). In step S18,
The immobilizer function release command and CW are sent to the EGI unit, and this program ends.

Further, the judgment in step S16 is N.
When it becomes O and the process proceeds to step S20, step S2
At 0, the immobilizer function setting command is transmitted to the EGI unit, and then at step S22, the processes at steps S6 to S14 are repeated again. Then, in step S24, it is again determined whether or not the ID transmitted from the transponder and the ID registered in the immobilizer unit match. As a result, if they match (YES in step S24), the process proceeds to step S18, and if they do not match (step S24).
If the determination is NO, the process proceeds to step S26, the immobilizer function setting command is transmitted to the EGI unit again, and the process proceeds to step S40 described later. Since the immobilizer function is automatically set by turning off the ignition switch, if the immobilizer function is not canceled, the immobilizer function is set or the immobilizer function cancellation determination waiting state described above is entered. That is, the immobilizer function setting command in step S26 and step S52, which will be described later, is exactly the immobilizer function setting maintenance command.

<ID judgment procedure on the immobilizer unit side when the ID code cannot be transmitted> Next, the ID code judgment procedure when the ID code cannot be transmitted to the immobilizer unit due to a transponder failure will be described. Transponder 1 like this
When the ID code cannot be sent due to a failure in the ID, first, on the immobilizer unit 4 side, the ID from the transponder 1
The operator (driver) is warned by blinking a warning lamp or the like that the signal cannot be received or the ID signal cannot be read. Upon receiving this warning, the operator (driver) recognizes the abnormality of the transponder 1. Further, the unreceivable or the ID signal cannot be read means that the code is not transmitted or the signal waveform representing the transmitted ID code is dull.

FIG. 5 is a flow chart showing the ID code determination procedure on the immobilizer side when transmission is impossible.
In step S10 shown in FIG. 3, when the ID response from the transponder is not received (step S10)
If the determination is NO, the process proceeds to step S40 shown in FIG. In step S40, it is determined that the ID code cannot be transmitted,
The warning lamp blinks to notify the driver of an abnormality such as a transponder failure or a break in the communication line (between the antenna and the immobilizer unit). Then, step S4
Then, the process proceeds to step 2, and it is determined whether or not there is a CW input by the driver's predetermined operation with the ignition switch. In step S42, if there is a CW input by the driver's operation of turning on / off the ignition switch (YES in step S42), the process proceeds to step S44, and the CW registered in the EEPROM in the immobilizer unit and the above-mentioned predetermined value. The CW input by the operation is compared. Then, in step S46, it is determined whether the CWs match,
When it is determined that they match with each other (the determination in step S46 is Y).
ES), the process proceeds to step S48, and the immobilizer function release command and CW are transmitted to the EGI unit. On the other hand, if it is determined in step S46 that the CWs do not match (NO in step S46), the process proceeds to step S52, the immobilizer function setting command is transmitted to the EGI unit, and then the process returns to step S2 in FIG. When it is determined in step S42 that there is no CW input by the predetermined operation (NO in step S42), the process proceeds to step S52, and an immobilizer function setting command is transmitted to the EGI unit.

After transmitting the immobilizer function release command and CW in step S48, in step S50,
Turn off the warning lamp. <CW Judgment Procedure on EGI Unit> Next, the CW judgment procedure on the EGI unit side will be described. 6 and 7 show
7 is a flowchart showing a CW determination procedure on the EGI unit side. In FIG. 6 and FIG. 7, when the process is started, in step S60, the timer counts 500 milliseconds after the ignition is turned on while waiting for the immobilizer function release determination and the number of CW requests to the immobilizer unit being zero. Start. In step S62, it is determined whether an additional write command has been received. Step S62
If the additional write command has not been received (NO at step S62), the process proceeds to step S64.
When the additional write command is received (step S
The determination in 62 is YES), and the process proceeds to step S152 described below.

In step S64, it is determined whether the engine speed is 500 rpm or more and the voltage is 10 V or more as a predetermined condition. If the predetermined condition is satisfied in step S64 (YES in step S64), step S64
66, if the predetermined condition is not satisfied (step S6)
If the determination in 4 is NO), the process returns to the start point of step S64. In step S66, it is determined whether or not the counting of 500 milliseconds started in step S60 is completed. If the count of 500 milliseconds has ended in step S66 (YES in step S66), step S66
68. If the count of 500 milliseconds has not ended in step S66 (the judgment in step S66 is N
O), and returns to the start point of step S66. In step S68, the EGI unit issues a CW request to the immobilizer unit. Then, the process proceeds to step S70, and it is determined whether or not there is a response from the immobilizer unit to the EGI unit to release the immobilizer function and CW. Step S7
0 to immobilize function release command and CW from immobilizer unit
If it is determined that there is a response (YES in step S70), the process proceeds to step S72, in which the RA on the EGI side is RA.
The CW is temporarily stored in M11. Then, it progresses to step S78 which shows the continuation in FIG. In step S78, it is determined whether or not the CW is registered in the EEPROM incorporated in the EGI unit. In step S78,
If the CW has already been registered in the EEPROM of the EGI unit (YES in step S78), step S82
And the CW stored in the RAM is E of the EGI unit.
It is determined whether or not it matches the CW registered in the EPROM. The CW stored in the RAM in step S82 is E
When it is determined that it matches the CW registered in the EEPROM of the GI unit (the determination in step S82 is Y
ES), the process proceeds to step S84, the immobilizer function is canceled, and normal EGI control is executed. In step S82, the CW stored in the RAM is the EGI unit E
If it does not match the CW registered in the EPROM (NO in step S82), the process returns to step S74.

Further, in the above-mentioned step S70, when it is determined that the immobilizer release command and the CW are not returned from the immobilizer unit (NO in step S70),
It proceeds to step S74. In step S74, it is determined whether or not the CW request has already been made 5 times to the immobilizer unit. If it is determined in step S74 that the CW request has been made 5 times (YES in step S74), the process proceeds to step S76, it is determined that the device is malfunctioning or stolen, the immobilizer function is set, and the engine is stopped. . On the other hand, if it is determined in step S74 that the process has not been performed five times (NO in step S74), the process returns to step S68, and the CW request is again issued to the immobilizer unit.

FIG. 8 is a timing chart showing the operations of the transponder, the ignition switch, the immobilizer unit and the EGI unit in the above-mentioned ID code determination procedure. <Additional Writing Procedure> Next, the procedure for rewriting the registered ID code will be described. This is the case, for example, with transponders 1, 2, 3, 4 with different ID codes.
(Specifically, keys 1, 2, 3, 4 having ID1, ID2, ID3, and ID4, respectively) among keys 2, 3, 4,
In order to prevent a car from being stolen by stealing or losing a car and using these lost keys to a third party, prepare new keys 5, 6 and 7 for immobilizer unit and EG.
This function is used when changing the ID code registered in the I unit. Figure 9 shows the registered ID
It is a figure explaining the procedure at the time of rewriting a code. Referring to FIG. 9, it is assumed that ID1, ID2,
If ID3 and ID4 were registered, ID1 and ID
The case of changing to 5, ID6, and ID7 will be described. In FIG. 9, key 1 is the ID registered before the code change
The key 1 is used first because the code is valid. First, the key 1 is inserted into the key hole, and the ignition switch is turned on and off five times. The engine is not started when entering the additional write mode. Therefore, the immobilizer function is not released in this mode.
This operation switches the immobilizer unit to the additional write mode, and the EEPR built in the immobilizer unit
Key 1 among codes ID1 to ID4 registered in OM
Clear ID codes other than. After that, remove the key 1 and insert the ID 5 key 5 within a predetermined time (about 4 seconds).
Since the ID request is issued from the I unit to the immobilizer unit, the transponder 5 uses the ID 5 of its own.
To the Immobilizer. In Immobility Unit, I
The code of D5 is received and registered in the built-in EEPROM. After that, the immobilizer unit outputs ID5 and CW according to the ID and CW request from the EGI unit.
Send to the GI unit side. In the EGI unit, ID
5. Receive CW and register it in the built-in EEPROM. After that, the ID and CW are returned to the immobilizer unit, and the ID and CW request is issued again. At this point, the ID code registered in the immobilizer unit and EGI unit is I
They are D1 and ID5.

By the same procedure, after removing the key 5 of ID5 and inserting the key 6 of ID6 within a predetermined time, the transponder 6 and EGI are transferred from the immobilizer unit.
Since the unit issues an ID and a CW request to the immobilizer unit, the transponder 6 sets its own I
Send D6 to the Immobili unit. Since the ID and CW request is issued from the EGI unit to the immobilizer unit side, a new ID6 is transmitted to the immobilizer unit side. The immobilizer unit receives the ID6 code and registers it in the built-in EEPROM. After that, the immobilizer unit transmits ID6 and CW to the EGI unit side in accordance with the ID and CW request from the EGI unit. EG
The I unit receives ID6 and CW and registers them in the built-in EEPROM. After that, I
D replies and requests ID again. At this point, EGI
The ID codes registered in the unit are ID1 and ID
There are three, 5 and ID6.

Similarly, when the key 7 of ID7 is inserted within a predetermined time after the key 6 of ID6 is removed, the transponder 7 from the immobilizer unit and the immobilizer unit from the EGI unit issue ID and CW requests, respectively. , The transponder 7 sends its own ID7 to the immobilizer unit. Also, since the EGI unit has issued an ID and CW request to the immobilizer unit, a new ID
7 is transmitted to the immobilizer unit side. The Immobilizer unit receives the code of ID7, and the built-in EEPROM
Register with M. After that, the Immobilizer unit will follow ID7 and CW according to the ID and CW requests from the EGI unit.
To the EGI unit side. In the EGI unit,
The ID7 and CW are received and registered in the built-in EEPROM. After that, IDCW is returned to the immobilizer unit.
At this point, there are four ID codes registered in the EGI unit: ID1, ID5, ID6, and ID7.
This means that all D code changes have been completed. After this,
If a new key is not inserted within the predetermined time, the additional write mode ends.

<Additional writing procedure in immobilizer unit>
Next, a specific additional write procedure in the immobilizer unit will be described. 10 and 11 are flowcharts showing the additional writing procedure on the immobilizer unit side. Figure 1
0, in FIG. 11, when the process is started, step S
At 100, it is determined whether or not the ignition switch is turned on by the key. If the ignition switch is turned on (YES in step S100), the process proceeds to step S102. If it is determined that the ignition switch is not turned on (NO in step S100), the process returns to the start point. In step S102, it is determined whether or not a predetermined condition (operation of turning on / off the ignition switch five times) is satisfied. Step S10
If the predetermined condition is satisfied in step 2 (step S102)
If the determination is YES), the process proceeds to step S104. on the other hand,
If the predetermined condition is not satisfied in step S102 (NO in step S102), the process returns to the start point of step S102.

In step S104, the ID request signal is transmitted from the immobilizer unit to the transponder. After that, in step S106, it is determined whether or not there is an ID response from the transponder, and if it is determined that there is an ID response (YES in step S106), the process proceeds to step S108 and it is determined that there is no ID response (step S106). S10
If NO in 6), this program ends. In step S108, the ID of the transponder is compared with the ID registered in the immobilizer unit. Step S11
When it is determined that the ID of the transponder and the ID registered in the immobilizer unit match with 0 (YES in step S110), the process proceeds to step S112, and it is determined that the IDs do not match. (NO in step S110), this program ends.

In step S112, the additional write command, the transponder ID, and the CW are transmitted to the EGI unit to enter the additional write mode.
Then, in step S114, all IDs other than the ID of the transponder currently in use are deleted. By the processing up to this point, the preparation for entering the additional write mode is completed. After that, in step S116, the key that has been turned on and off five times within a predetermined time (for example, about 4 seconds) is removed, a key with another ID is inserted, and it is determined whether the engine has started. If the engine has started in step S116 (YES in step S116), the process proceeds to step S118. If the engine has not started (step S116).
If the determination is NO), the additional writing process of the ID is not performed, and the additional writing mode ends.

At step S118, the timer built in the immobilizer unit is reset, and at the same time, step S1
At 20, the timer is started. Then, the process proceeds to step S122. In step S122, it is determined whether or not an ID / CW request has been received from the EGI unit. In step S122, when the ID and CW request is received from the EGI unit (determination in step S122 is YE
S), and proceeds to step S124. On the other hand, step S12
If the ID and CW requests are not received from the EGI unit in step 2 (NO in step S122), the process returns at the start of step S122.

After the indicator is turned on in step S124, the ID request is transmitted to the transponder in response to the ID / CW request from the EGI unit in step S126. Then, in step S128, it is determined whether or not a response from the transponder to the ID request in step S126 is received. Step S128
In step S1, if a response from the transponder is received (YES in step S128), step S1
Proceed to 30. On the other hand, in step S128, when the response from the transponder is not received (NO in step S128), the process returns to the start point of step S128. Then, it progresses to step S130.
In step S130, the transponder (another key)
The ID code transmitted from is stored in the RAM of the immobilizer unit.

Then, in step S132 of FIG. 11, the additional write command, the ID to be newly registered, and the CW are transmitted to the EGI unit. Then, it is determined again whether or not the ID and CW request is transmitted from the EGI unit (step S134). After that, step S
When it is determined in 134 that the ID and CW request has been transmitted (YES in step S134), the process proceeds to step S136, and the additional write command, the newly registered ID, and the CW are transmitted to the EGI unit again. .
After that, in step S138, it is determined whether or not the response of the additional write OK is satisfied from the EGI unit. If there is a response (determination YES in step S138), the process proceeds to step S140, and the EEPROM in the immobilizer unit
Then, the ID temporarily stored in the RAM is registered, and then the indicator is turned off in step S142. On the other hand, if there is no reply in step S138 (step S1
If the determination is NO in 38), the process proceeds to step S144, the indicator is blinked, and the processing program in the additional write mode is ended.

<Additional Writing Procedure in EGI Unit>
Next, a procedure for additionally writing the ID code in the EGI unit will be described. FIG. 12 is a flowchart showing the additional writing procedure on the EGI unit side. When the EGI unit receives the additional write command, ID, and CW in step S62 of FIG. 6 described above (NO in step S80), step S15 shown in FIG.
Proceed to 2 and issue an ID and CW request to the immobilizer unit. In step S154, it is determined whether or not a reply to the ID and CW request transmitted in step S152 has been received from the immobilizer unit. In step S154, when the ID and CW responses are received from the immobilizer unit within the predetermined time (determination in step S154 is YES).
S), and proceed to step S156. On the other hand, step S15
If the ID and CW response is not received from the immobilizer unit within the predetermined time in step 4 (determination in step S154 is N
O), and returns to the start point of step S74 described in FIG. Then, in step S156, the CW received from the immobilizer unit matches the CW registered in the EGI, and the received ID code is the EE of the EGI unit.
It is determined whether the ID code is registered in the PROM. If the same code is not found in step S156 (NO in step S156), the process proceeds to step S158,
If the same code exists (YES in the determination in step S156), the process proceeds to step S166 and additional writing is OK.
Send a command to the immobilizer unit.

In step S158, the new ID code is temporarily stored in the RAM of the EGI unit. Step S
The new ID code in 158 means an ID code determined to have no identical code in step S156. Then, the process proceeds to step S160, and the processes in steps S152 to S158 described above are executed again. Thereafter, in step S162, the two IDs and the two CWs stored in the RAM are compared with each other, and if it is determined in step S164 that both the ID and the CW match (YES in step S164), Step S1
Proceed to 66. On the other hand, if either ID or CW does not match (NO in step S164), the additional write mode ends.

After that, in step S166, an additional write OK command for the ID code is transmitted to the immobilizer unit, and the process proceeds to step S152 described above.
The procedure is the same as described above. By the procedure explained above,
The ID code is additionally written in the immobilizer unit and EGI unit. The processing after step S68 in FIG. 7 and the processing after step S122 in FIG. 10 are synchronized between the units.

FIG. 13 is a timing chart showing the operations of the transponder, the ignition switch, the immobilizer unit, and the EGI unit in the procedure of adding a key (changing the ID code and additional writing). As shown in FIG. 13, the on / off timing of the ignition switch in step S102 of FIG. 10 is about 2 seconds, and the operation is performed 5 times to replace the additional key within 4 seconds.

<Replacement of Immobilizer Unit> Next, the ID when the Immobilizer unit fails and is replaced with a new unit.
The code and CW registration procedure will be described. In this process, since only the CW is initially registered in the newly installed immobilizer unit, the ID code registered in the EGI unit is used to register the ID code in this immobilizer unit. Specifically, the key is used to start the engine, the new immobilizer unit temporarily stores the ID transmitted from the transponder in the immobilizer unit's RAM, and the transponder's I
D, CW, and IE command (ID unregistered command) are transmitted. The EGI unit temporarily stores the ID sent from the transponder and the CW sent from the immobilizer unit (as a matter of course, the C of the new immobilizer unit).
W and the CW registered in the EGI unit are different at this point). Then, the EGI unit takes in the transponder ID twice and determines whether or not these two IDs match. Next, if it is determined that the two IDs match, the IDs are compared with the IDs registered in the EGI unit. If the IDs match, the CW in the EGI unit is rewritten to the CW of the new immobilizer unit. Then, CW rewriting O for the Immobilizer unit
When K is returned, the immobilizer unit newly registers the previously temporarily stored ID.

FIG. 14 is a flowchart showing the ID code writing procedure on the immobilizer unit side when the immobilizer unit is replaced. In FIG. 14, when the process is started, it is determined in step S170 whether the ignition switch is turned on by the key. If the ignition switch is turned on (YES in step S170), the process proceeds to step S172. If it is determined that the ignition switch is not turned on (NO in step S170), the process returns to the start point. Step S17
In step 2, it is determined whether a CW request has been received from the EGI unit. When the CW request is received from the EGI unit in step S172 (YES in step S172), the process proceeds to step S174. On the other hand, step S
If the CW request is not received from the EGI unit in 172 (NO in step S172), step S
The process returns to the start point of 170.

Next, in step S174, it is determined whether or not the ID code is registered in the EEPROM of the immobilizer unit. If the ID code is registered in step S174 (YES in step S174),
In step S14 described above with reference to FIG. 4, normal processing is executed. On the other hand, if the ID code is not registered in step S174 (determination is N in step S174).
O), proceeding to step S176, the ID transmitted from the transponder is temporarily stored in the RAM of the immobilizer unit. After that, in step S178, the indicator is turned on, and in step S180, the ID unregistered command (IE
Command), CW, and ID to the EGI unit.
After that, upon receiving the CW request from the EGI unit (step S182), the transponder ID is temporarily stored in the RAM in the immobilizer unit in step S184. In step S186, the CW from the EGI unit
According to the request, ID unregistered command (IE command),
Send CW, ID to EGI unit. After that,
In step S188, it is determined whether a CW rewrite OK response has been received from the EGI unit. If there is a reply in step S188 (YES in step S188), the flow advances to step S190 to register the ID temporarily stored in the RAM in the EEPROM in the immobilizer unit. Then, in step S194, the indicator is turned off. On the other hand, if there is no response from the EGI unit in step S188 (the determination in step S188 is N
O), proceeding to step S196, blinking the indicator and ending the processing program in the CW writing mode.

FIG. 15 is a flowchart showing the CW rewriting procedure on the EGI unit side when the immobilizer unit is replaced. In FIG. 15, when the processing is started, the same processing as the processing in steps S60 to S68 described in FIG. 6 is performed in steps S200 to S20.
8, the ID unregistered command (IE command), C from the immobilizer unit in step S210.
W, ID is received. Then, in step S212,
The CW and ID received from the immobilizer unit are temporarily stored in the RAM. In step S214, steps S208-
The process of step S212 is executed again, and step S2
Proceed to 16. In step S216, it is determined whether the two IDs temporarily stored in the RAM of the EGI unit match. If the two IDs match in step S216 (YES at step S216), the process proceeds to step S218. If the two IDs do not match at step S216 (NO at step S216), the process proceeds to step S224. In step S224, it is determined whether the number of CW requests for the immobilizer unit is 6 or more. If the number of CW requests is 6 or more in step S224 (YES in step S224), the process proceeds to step S226, the immobilizer function is set, and the engine is stopped. Further, if the number of CW requests is not 6 or more in step S224 (determination is N in step S224).
O), and returns to step S208.

Next, in step S218, it is determined whether or not the ID registered in the EEPROM of the EGI unit matches the ID stored in the RAM.
If the two IDs match in step S218 (YES in step S218), the process advances to step S220. In step S220, the CW registered in the EGI unit is the new CW received from the immobilizer unit.
Rewrite Then, in step S222, the immobilizer function is released, and normal EGI control is executed. On the other hand, if the two IDs do not match in step S218 (NO in step S218), the flow advances to step S226.
Set the immobilizer function and stop the engine.

[Initial writing procedure of ID code and CW]
Next, a description will be given of a registration procedure in the case where an immobilizer unit and an EGI unit are assembled (hereinafter referred to as an initial state) at an automobile assembly factory and then an ID code and a CW are registered in each unit. In the initial state, only the CW is initially registered in the newly installed immobilizer unit. Also, the EGI unit has
Neither ID code nor CW is registered. Further, in the system of the present embodiment, communication is not performed between the immobilizer unit and the EGI unit unless the engine is started,
With this system, it is necessary to start the engines one by one and register the ID code and CW. However,
Starting the engines one by one in the factory production line is very inefficient. For this reason, in this embodiment, a handheld tester (hereinafter abbreviated as HHT), which is a device dedicated to registering the ID code and CW in the initial state, is provided so that the ID code and CW can be registered without starting the engine. We are taking measures. This HHT is large enough to be held by one hand, has a display section and operation keys, and an operator can perform a registration operation using the operation keys while looking at the display section. FIG. 16 shows a block configuration in a state where the HHT and the immobilizer unit and the EGI unit are connected. As shown in FIG. 16, HHT20
Are connected to the communication line between the immobilizer unit 4 and the EGI unit 9. The power source is taken from the battery power source + B. Further, the EGI unit 9 and the HHT 20 are connected by a test terminal A, and the test terminal A can be turned on and off, and is normally 12 V in the off state, but is grounded (GND) when turned on. ing. The connection state between the immobilizer unit 4 and the EGI unit 9 is the same as the state shown in FIG. Furthermore, HHT20
Although not shown, the circuit block configuration of the main body is similar to that of the immobilizer unit and the EGI unit. The EEPROM stores the program data in advance, the RAM temporarily stores the data, and the transfer of the data stored in these memories. It is composed of a timer that sends timing as data, and a CPU that controls the exchange of data with the immobilizer unit based on the timing information from the timer. FIG. 17 shows a terminal arrangement of the above-mentioned immobilizer unit, EGI unit, HHT, and connector. FIG. 17 (a),
As shown in (b), the immobilizer unit and the EGI unit are communicably connected via a terminal a, and battery power is supplied from terminal j and ignition power is supplied from terminal k. The immobilizer unit is connected to the amplifier at terminals f and h, and is connected to the indicator at terminal m. The terminal c is ground. Further, as shown in FIGS. 17C and 17D, the HHT is communicatively connected to the respective units by the terminal D, and the battery power is supplied from the terminal B. Further, the EGI unit and the HHT are connected by the test terminal A. Terminal C is ground.

Next, in the connection state described above, H
A procedure for registering the ID code and CW in each unit without operating the HT to start the engine will be described. For example,
When three keys having ID codes of ID1, ID2, and ID3 are registered in the order of ID1 to ID3, the registration operation is performed in the following order. That is, first, the key of ID1 is prepared, and ID1 is registered in the immobilizer unit.

The CW registered in the immobilizer unit is registered in the EGI unit. Register ID1 in the EGI unit. Next, a second key of ID2 is prepared and ID2 is registered in the immobilizer unit. Register ID2 in the EGI unit.

Similar to the operation of and, ID3 is registered in the immobilizer unit and the EGI unit. In the above operations, after turning the key to the ignition on position and turning on the system power of the immobilizer unit, the immobilizer unit reads the key ID after receiving the CW request from the EGI unit. Since the vehicle does not communicate with the immobilizer unit unless the engine is started, the CW request cannot be issued to the immobilizer unit only by turning on the ignition. Therefore, by operating the HHT, the HH
The T communicates with the immobilizer unit as if it were an EGI unit, and causes the immobilizer unit to register the ID code. After that, the test terminal of the EGI unit is turned on by the HHT to forcibly bring the EGI unit into the state at the time of engine start, set to the communicable state, and execute the CW registration. ID to EGI unit
The code registration is performed according to the above-described additional registration procedure by transmitting an additional registration mode setting command from the HHT to the immobilizer unit, which is originally performed by a predetermined key operation (on / off operation of the key by the key 5 times). It In addition, in the operation of and, by rotating the key to register to the ON position of the ignition and operating the test terminal of the EGI unit by HHT while the immobilizer unit is in the additional registration mode, A new ID is sequentially registered in the unit and the EGI unit. It should be noted that the above registration procedure cannot detect that the HHT is connected to both the immobilizer unit and the EGI unit.

Hereinafter, a specific initial write procedure will be described separately for each operation of the immobilizer unit, the EGI unit, and the HHT with reference to the flowcharts shown in FIGS. <Initial write procedure on the immobilizer unit side> Figures 19 and 2
0 is the ID code on the immobilizer unit side in the initial state,
It is a flow chart which shows the initial writing procedure of CW.
In FIG. 19, when the process is started, step S30
At 0, it is determined whether or not the ignition switch is turned on by the key. If the ignition switch is turned on (YES in the determination in step S300), the process proceeds to step S302, and if it is determined not to be turned on (the determination in step S300 is NO), the process returns to the start point. In step S302, it is determined whether or not an additional write command has been received from the EGI unit (actually HHT). If the additional write command has been received (YES in step S302), the process proceeds to step S324, which will be described later, and if it has not been received (NO in step S302), the process proceeds to step S304. In step S304, the EGI unit (actually HH
It is determined whether the CW request is received from T). When the CW request is received from the EGI unit in step S304 (YES in step S304), the process proceeds to step S306. On the other hand, when the CW request is not received from the EGI unit in step S304 (step S3
If the determination in 04 is NO), the process returns to the start point of step S300.

Next, in step S306, it is determined whether or not the ID code is registered in the EEPROM of the immobilizer unit. If the ID code is registered in step S306 (YES in step S306),
In step S14 described above with reference to FIG. 4, normal processing is executed. On the other hand, if the ID code is not registered in step S306 (determination is N in step S306).
O), proceeding to step S308, the ID transmitted from the transponder is temporarily stored in the RAM of the immobilizer unit. Then, in step S310, an ID unregistered command (IE command), CW, and ID are transmitted to the EGI unit (actually HHT). Then, in response to the CW request from the EGI unit (actually HHT) (step S3
12) In step S314, the transponder ID is temporarily stored in the RAM in the immobilizer unit. In step S316, the EGI unit (actually HHT)
In accordance with the CW request from the EID unit (actually HH
T). Then, in step S318, it is determined whether or not a CW rewrite OK response has been received from the EGI unit (actually HHT). Step S
If there is a response at 318 (YES at step S318), the process proceeds to step S320, and the ID temporarily stored in RAM is stored in the EEPROM of the immobilizer unit.
After registering, return to the beginning of this program. On the other hand, if there is no response from the EGI unit in step S318 (NO in step S318), the processing program in the CW writing mode ends.

If the additional write command is received in step S302 described above (YES in step S302), the flow advances to step S324 shown in FIG.
In step S324, it is determined whether or not a CW request is received from the EGI unit (at this point, the test terminal is turned on by the HHT and the EGI unit is in a communicable state). When the CW request is received from the EGI unit in step S324 (YES in step S324), the process proceeds to step S326. On the other hand, if the CW request is not received from the EGI unit in step S324 (NO in step S324), the process returns to the start point of step S300.

In step S326, the immobilizer unit transmits an ID request signal to the transponder. Then, in step S328, it is determined whether or not there is an ID response from the transponder. If it is determined that there is an ID response (YES in step S328), the process proceeds to step S330, and it is determined that there is no ID response (step S328). S32
If NO in 8), this program ends. In steps S330 and 332, the ID of the transponder is compared with the ID registered in the immobilizer unit. When it is determined in step S330, 332 that the transponder ID and the ID registered in the immobilizer unit match (YES in step S332), the process proceeds to step S334, and it is determined that the IDs do not match. If so (determination NO in step S332), this program ends.

After that, in step S334, the additional write command, the ID to be newly registered, and the CW are EGI.
Send to the unit. Then, in step S336, E
It is determined whether or not there is a response to the additional writing OK from the GI unit, and if there is a response (determination YES in step S336), the process proceeds to step S338, and is temporarily stored in RAM in the EEPROM in the immobilizer unit. I
Register D. On the other hand, in step S336, when there is no reply of the additional writing OK (determination is N in step S336).
O), the program ends. After that, step S3
In step 40, the immobilizer unit determines whether or not the additional write mode release command is received (actually from the HHT), and if it is received (in step S340, the determination is YE).
S), the additional write mode is released, and this program ends. On the other hand, when the additional write mode release command is not received in step S340 (step S340
If the answer is NO, the process returns to step S324.

<Initial Writing Procedure on EGI Unit Side> FIGS. 21 and 22 are flowcharts showing the initial writing procedure of the ID code and CW on the EGI unit side in the initial state. In addition, in this EGI unit side flow,
The test terminal of the HHT is in the ON state. 21, when the process is started, step S6 described in FIG.
The same processing as the processing of 0 to step S68 (excluding step S62) is executed in steps S400 to S406, and in step S408, the function release command and CW are received from the immobilizer unit. Then, in step S410, the CW received from the immobilizer unit
Is temporarily stored in RAM. In step S412, the processes in steps S406 to S410 are executed again, and the process proceeds to step S414. In step S414,
It is determined whether or not the two CWs temporarily stored in the RAM of the EGI unit match. 2 in step S414
If the two CWs match (YES in step S414), the process advances to step S416 and step S414.
If the two CWs do not match in step S414 (step S414)
If NO, the process proceeds to step S424. Step S4
At 24, it is determined whether the number of CW requests to the immobilizer unit is 6 or more. CW in step S424
If the number of requests is six or more (YES in step S424), the flow advances to step S426 to set the immobilization function. Further, in step S424, the number of CW requests is 6
If it is not more than the number of times (NO in step S424),
It returns to step S406.

In step S416, it is determined whether the ID is already registered in the EEPROM. If the ID is already registered in step S416 (YES in step S416)
S), and proceeds to step S418. On the other hand, step S41
If the ID is not registered in step 6 (determination is N in step S416)
O), and proceeds to step S430 described below. Step S4
In No. 18, when the function release command is received from the immobilizer unit and the CW is not registered in the EEPROM, or
It is determined whether or not any of the cases where D is unregistered and the CW in the EEPROM and the received CW do not match is satisfied. If the determination is YES in step S418, the process proceeds to step S420, and if the determination is NO, the process proceeds to step S426.

In step S420, the received CW is registered in the EEPROM, and in step S422, the function release is OK.
Send the command to the immobilizer unit (actually HHT). If the ID has not been registered in step S416, the process proceeds to step S430 shown in FIG. Step S
At 430, it is determined whether an additional write command has been received. If the additional write command is not received in step S430 (the determination in step S430 is N
O), the process returns to step S406, and if the additional write command has been received (YES at step S430), the process proceeds to step S432.

In step S432, an ID and CW request is issued to the immobilizer unit. In step S434,
It is determined whether or not the reply to the ID and CW request transmitted in step S432 is received from the immobilizer unit. In step S434, when the ID and CW reply is received from the immobilizer unit within the predetermined time (YES in step S434), the process proceeds to step S436. On the other hand, if the ID and CW responses are not received from the immobilizer unit within the predetermined time in step S434 (NO in step S434), the program ends.

In step S436, the ID code and CW are temporarily stored in the RAM of the EGI unit. Then, it progresses to step S438 and above-mentioned step S432, 43.
The process of 4 is executed again. Then, step S44
At 0, the two IDs and the two CWs stored in the RAM are compared with each other, and if it is determined in step S442 that both the ID and CW match (determination in step S442 is Y).
ES), and proceeds to step S444. On the other hand, ID or CW
If there is no match in either case (NO in step S442), this program ends.

Thereafter, in step S444, the ID code is registered, and in step S446, an additional write OK command for the ID code is transmitted to the immobilizer unit, and the process returns to step S430. <Initial write procedure on HHT side> FIGS.
It is a flowchart which shows the initial writing procedure of ID code and CW on the HT side. In FIG. 23, before the processing is started, the operator first inputs the number of keys to be registered with the operation keys of the HHT. Enter the number of keys,
Next, "KEYON" is displayed, and the ignition is turned to the on position using the key to be registered. Then, "RUN" is displayed on the display unit, and the HHT process is started from here.

When the (registration of the ID to the immobilizer unit) process is started, the EGI unit is not in the engine starting state (communication possible state), so in step S500, HH
The T sends a CW request to the immobilizer unit. C
The immobilizer unit that has received the W request executes the processing from step S302 shown in FIG. Whether the HHT receives a function setting command (step S502), IE command, CW, ID (step S506), function release command, and CW (step S508) from the immobilizer unit while the immobilizer unit is performing a predetermined process. To determine. When the function setting command is received in step S502 (YES in step S502), "ERROR" is displayed on the display unit due to an operation error or the like, an alarm is issued, and the operator starts the operation again from the beginning. (Step S504). Next, step S506.
Then, when the function setting command is received (step S50)
(YES in 6), CW rewrite OK is transmitted to the immobilizer unit in step S508, and step S51
Go to 0. Furthermore, when the function release command and CW are received in step S509 (determination in step S509 is Y
ES), the process proceeds to step S510, and the CW request is transmitted again to the immobilizer unit. Then, steps S502, S
Steps S506 and S509 are steps S512 and S51.
6. If it is executed again as S518, and the IE command, CW, and ID are received again at step S516 (YES at step S516), "ERROR" is displayed on the display unit due to an operation error and an alarm is issued. And the operator redoes the operation from the beginning (step S5).
14). After that, in step S518, when the function release command and CW are received (determination in step S518 is Y
ES), and proceeds to step S520.

(Registration of CW in EGI Unit) In step S520, function release OK is transmitted to the immobilizer unit. After that, in step S522, the test terminal is waited until it is turned on, and if it is turned on (determined YES in step S522), the EGI unit is in the same state as when the engine is started, and the step S shown in FIG.
The processing from 400 is executed. During this period, step S52
In 4 the HHT sends the function setting command E from the immobilizer unit.
Monitor whether it was sent to the GI unit.
When the function setting command is received in step S524 (YES in step S524), "ERROR" is displayed on the display unit due to an operation error or the like, an alarm is issued, and the operator starts the operation again from the beginning (step). S526). In addition, if the determination in the EGI unit is NO in step S418 described above, the function is set in the EGI unit, and after a predetermined time has elapsed, "ERROR" is displayed on the display unit due to an operation error or the like, and an alarm is issued. The operator restarts the operation from the beginning. In subsequent step S528, it is determined whether the function release OK is transmitted from the EGI unit to the immobilizer unit. Function release O in step S528
When K is transmitted (determined as YES in step S528)
S) Then, in step S530, after detecting that the test terminal is turned off, "KEYOFF" is displayed on the display unit and the ignition switch is turned off.

(ID registration to the EGI unit) After that,
"KEYON" is displayed again on the display, and when the key is turned to the ignition on position, "RUN" is displayed.
The process proceeds to step S532 shown in FIG. Step S53
In 2, the additional write command is transmitted to the immobilizer unit. The immobilizer unit executes the processing from step S324 shown in FIG. Step S534
Then, after detecting that the test terminal is turned on, in step S536, the EGI unit is in the same state as when the engine was started, and it is determined whether or not the function setting command is transmitted from the immobilizer unit to the EGI unit. When the function setting command is received in step S536 (YES in step S536), "ERROR" is displayed on the display unit due to an operation error or the like, an alarm is issued, and the operator starts the operation again from the beginning. (Step S538). On the other hand, if the determination is NO in step S536, the process proceeds to step S540, and it is determined whether or not the ID writing OK is transmitted from the EGI unit to the immobilizer unit. If the ID writing OK is not transmitted even after the predetermined time has elapsed in step S540, "ERROR" is displayed on the display unit due to an operation error or the like, an alarm is issued, and the operator restarts the operation from the beginning. On the other hand, if the ID writing OK is transmitted in step S540 (YES in step S540), step S54
After detecting that the test terminal is turned off in step 8, the process proceeds to step S550. In step S550,
From the registered ID, it is determined whether the number of registered keys is the initially set number. Step S550
If the number of registrations is the set value (YES in step S550), the process proceeds to step S552, an additional write mode release command is transmitted to the immobilizer unit, "END" is displayed on the display unit, and then this program is executed. finish. On the other hand, if the number of registrations is not the set value in step S550 (NO in step S550), "K" is displayed on the display unit.
After displaying "EYOFF" and turning off the ignition switch, "NEWKEY" is displayed, so remove the key you have been using until now and turn it to the ignition position using the new key. Is displayed and the process proceeds to step S554. In step S554, a CW request is transmitted to the immobilizer unit. In subsequent steps S556, 558, and 560, the same processing as steps S512 and S514S516 described above is executed. If the determination is YES in S560, the process proceeds to step S562, and it is determined whether or not an additional write command is received from the immobilizer unit.
If the additional write command is not received at (step S
(No in 562), “ERROR” is displayed on the display unit, an alarm is issued, and the operator restarts the operation from the beginning. On the other hand, if the additional write command is received in step S562 (determination in step S562 is YES).
S), the process proceeds to step S564, the ID / CW request is transmitted to the immobilizer unit, and in step S566, the ID / CW request is sent.
If there is a reply of, the process proceeds to step S568. In step S568, it is determined whether the received ID is different from the registered ID. If the ID received in step S568 is the same as the registered ID (NO in step S568), "ERROR" is displayed on the display unit and an alarm is issued to determine that the operator has made a key error.
The operator turns on the ignition again by using the regular key and displays "RUN" to cause the HHT to execute the processing from step S554 again. If the ID received in step S568 is different from the registered ID (YES in step S568), step S5
The process returns to step 34 and the same processing is executed thereafter.

FIG. 25 is a timing chart showing the operations of the ignition switch, immobilizer unit, EGI unit, and HHT in the initial setting procedure. [Another form of the initial writing procedure] In the above embodiment, the EGI unit was set to the same state as when the engine was started by turning on / off the test terminal. However, as shown in FIG.
T is connected to the input terminal A'of the ignition pulse for detecting the rotation speed of the engine connecting the EGI unit 9 and the distributor 30 in place of the test terminal A, and HH
It is also possible to set the EGI unit in the same state as when the engine is started by outputting a pulse signal corresponding to the pseudo idling speed from T20. Further, in order to realize the embodiment of this another mode, in the control procedure of the HHT shown in FIGS. 23 and 24, the “pseudo pulse signal” is selected by performing the “test terminal on / off” operation of step S522 and step S530. It is sufficient to replace it with the "output / output stop" operation described above, and it is possible to obtain the same effect as that of the above embodiment without changing the operation procedure of the operator.

[Other Embodiments] Further, another embodiment relating to the operation of the EGI unit common to the above embodiments is shown in the flowchart of FIG. As shown in FIG. 26, in step S404 ′, the connection state of the test terminal of the EGI unit itself may be detected whether or not it is grounded.

(Effects of the Embodiment) As described above, in the vehicle production line factory, the ID code can be registered in the immobilizer unit and the ID and CW can be registered in the EGI unit without starting the engine one by one. Work efficiency can be improved. The present invention can be applied to the modified or modified embodiment described above without departing from the spirit of the invention.

For example, the antitheft device of this embodiment is realized by both the immobilizer unit and the EGI unit, but a system may be constructed so that either one of the devices performs processing. . For example, it goes without saying that the predetermined operation and timing time for determining the ID code and codeword, and newly setting the ID code at the time of registering the code in the initial state can be arbitrarily set.

[0064]

As described above, according to the initial setting device of the vehicle antitheft device of the present invention, a new unique code of the key is newly provided to the code judging section and the engine control section where the code is not registered. When it is desired to register, the unique code of the key can be newly registered without starting the engine for each vehicle, and the production efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a system block diagram of an anti-theft device for a vehicle according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a procedure for determining an ID code and a codeword of a transponder 1 having certain unique ID data.

FIG. 3 is a flowchart showing a procedure for determining and registering an ID code on the immobilizer unit side.

FIG. 4 is a flowchart showing a procedure for determining and registering an ID code on the immobilizer unit side.

FIG. 5 is a flowchart showing a procedure for determining an ID code on the immobilizer unit side when the ID code cannot be transmitted.

FIG. 6 is a flowchart showing an ID code determination procedure on the EGI unit side.

FIG. 7 is a flowchart showing an ID code determination procedure on the EGI unit side.

FIG. 8 is a transponder, an ignition switch, an immobilizer unit, an E in an ID / CW code determination procedure.
6 is a timing chart showing each operation of the GI unit.

FIG. 9 is a diagram illustrating a procedure when rewriting an already registered ID code.

FIG. 10 is a flowchart showing an additional writing procedure on the immobilizer unit side.

FIG. 11 is a flowchart showing an additional writing procedure on the immobilizer unit side.

FIG. 12 is a flowchart showing an additional writing procedure on the EGI unit side.

FIG. 13 is a timing chart showing each operation of a transponder, an ignition switch, an immobilizer unit, and an EGI unit in a key addition (change of ID code, additional writing) procedure.

FIG. 14 is a flowchart showing an ID code writing procedure on the immobilizer unit side when the immobilizer unit is replaced.

FIG. 15 is a flowchart showing a codeword rewriting procedure on the EGI unit side when the immobilizer unit is replaced.

FIG. 16 is a diagram showing a block configuration in a state where an HHT is connected to an immobilizer unit and an EGI unit in an initial write state.

FIG. 17 is a diagram showing a terminal arrangement of each connection terminal and connector of an immobilizer unit, an EGI unit, and an HHT.

FIG. 18 is a diagram showing a block configuration in a state where an HHT is connected to an immobilizer unit and an EGI unit as another form of FIG. 16 in an initial write state.

FIG. 19 is a flowchart showing the initial writing procedure of the ID code and CW on the immobilizer unit side when the immobilizer unit and the EGI unit are in the initial state.

FIG. 20 is a flowchart showing an initial writing procedure of an ID code and CW on the immobilizer unit side when the immobilizer unit and the EGI unit are in an initial state.

FIG. 21 is a flowchart showing an initial writing procedure of the ID code and CW on the EGI unit side when the immobilizer unit and the EGI unit are in the initial state.

FIG. 22 is a flowchart showing an initial writing procedure of an ID code and CW on the EGI unit side when the immobilizer unit and the EGI unit are in an initial state.

FIG. 23 is a flowchart showing an initial writing procedure of the ID code and CW on the HHT side when the immobilizer unit and the EGI unit are in the initial state.

FIG. 24 is a flowchart showing an initial writing procedure of an ID code and CW on the HHT side when the immobilizer unit and the EGI unit are in the initial state.

FIG. 25 is a timing chart showing each operation of the ignition switch, immobilizer unit, EGI unit, and HHT in the initial writing procedure.

FIG. 26 is a flowchart of an initial writing procedure of an EGI unit as another embodiment.

[Explanation of symbols]

1 ... Transponder, 2 ... Ignition coil antenna, 3 ... amplifier, 4 ... Immobilizer unit, 5 ... Immobilizer unit EEPROM, 6 ... Imobi side RAM, 7 ... Immobilizer timer, 8 ... Immobilizer side CPU, 9 ... EGI unit, 10 ... EGI unit side EEPROM, 11 ... EGI unit side RAM, 12 ... EGI unit side timer, 13 ... CPU on EGI unit side, 14 ... Immobilizer unit power supply, 15 ... EGI unit side power supply, 20 ... HHT.

Front page continuation (72) Inventor Hiroyuki Nagai 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (56) Reference JP-A-2-164647 (JP, A) JP-A-2-279429 ( (58) Fields investigated (Int.Cl. ⁷ , DB name) G08B 13/00-15/02 B60R 25/04

Claims (8)

(57) [Claims] 1. A first code peculiar to the transmitter is received from the transmitter side on the basis of a code transmission request from an engine control section, and the first code peculiar to the transmitter is stored in the receiver side. A code determination unit that collates the code and outputs a second code to the engine control unit if they match,
An engine control unit that collates the second code with a code stored in the engine control unit and, if they match, allows the engine to start, the engine control unit is configured to determine the code in response to the engine start. In a vehicle anti-theft device that requests a section to transmit the second code, the first code is registered in the code determination section, and the first and second codes are registered in the engine control section. An initial setting device for a vehicle anti-theft device, comprising: forcing means for forcibly generating an engine start state for the engine control unit. apparatus. 2. The method further comprises means for confirming whether or not the collation result of the first code in the code judging section coincides with each other, wherein the forcing means is based on the confirmation result by the confirming means. The initial setting device for a vehicle antitheft device according to claim 1, wherein the engine control unit is forced to generate an engine start state. 3. The forcing means causes the engine control section to register the second code by forcibly generating the engine starting state.
An initial setting device for a vehicle antitheft device according to. 4. A means for transmitting a predetermined signal for entering a code additional registration mode for registering the first code to the code determination section and the engine control section to the code determination section and the engine control section. The initial setting device for a vehicle antitheft device according to claim 1, further comprising: 5. A first code peculiar to the transmitter is received from the transmitter side on the basis of a code transmission request from the engine control unit, and the first code peculiar to the transmitter is stored in the receiver side. A code determination unit that collates the code and outputs a second code to the engine control unit if they match,
An engine control unit that collates the second code with a code stored in the engine control unit and, if they match, allows the engine to start, the engine control unit is configured to determine the code in response to the engine start. In a vehicle anti-theft device that requests a section to transmit the second code, the first code is registered in the code determination section, and the first and second codes are registered in the engine control section. A vehicle anti-theft device for initial setting, comprising: a pseudo signal generating unit for transmitting an engine start pseudo signal indicating an engine start state to the engine control unit. The initial setting device of the protection device. 6. The method further comprises means for confirming whether or not the collation result of the first code in the code judging section coincides with each other, and the pseudo signal generating means is based on the confirmation result by the confirming means. The engine initialization pseudo signal is transmitted to the engine control unit by the engine control unit, and the initial setting device for the vehicle antitheft device according to claim 5, wherein. 7. The initial setting device for a vehicle antitheft device according to claim 6, wherein the pseudo signal generating unit generates a signal for registering the second code in the engine control unit. . 8. A pseudo mode setting signal for entering a code additional registration mode for registering the first code in the code determination unit and the engine control unit is transmitted to the code determination unit and the engine control unit. The initial setting device for a vehicle antitheft device according to claim 5, further comprising means.