JPH039517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality warning device in a consolidated wiring system of an automobile, and in particular to an abnormality alarm device that connects control objects such as operation switches of an instrument panel and lamps and various sensors installed in various parts of the automobile. The present invention relates to a device that warns of abnormal operation of each controlled object in an integrated wiring system used for communication between systems.

Recently, with the increase in the number of control objects such as lamps and various sensors installed in automobiles, electrical wiring has become complicated, wiring work has become more complicated, wiring errors are more likely to occur, and the amount of wire used has increased, making it more expensive. There is a problem. In order to solve this problem, an integrated wiring system has been proposed that remotely controls a large number of control objects using one data transmission line (control signal line). These control signal lines include those that use electric wires to couple electrical signals, and those that use optical fibers to couple optical signals. In any case, a central control unit including a central processing unit (CPU) is provided at one end of the data transmission line. This central control section remotely controls the controlled object connected to the other end of the data transmission line in response to the operating state of the operating switch.

However, in an integrated wiring system, when the objects to be controlled are various types of lamps, normal operation may not be performed due to a burnout of the lamp, or due to an abnormality in data transmission between the central control unit and the terminal control unit. There was a problem in that it was not possible to determine whether the system was not working or not, and it was not possible to accurately detect abnormalities in various controlled objects.

Therefore, an object of the present invention is to be able to remotely detect abnormal operation states of a plurality of controlled objects in an automobile centralized wiring system, and to detect failures (or abnormalities) of the controlled objects or between the central control unit and the terminal control unit. An object of the present invention is to provide an abnormality warning device for a consolidated wiring system of an automobile, which can determine whether there is an abnormality in the data transmission system of a vehicle and is useful for safe driving.

In summary, the present invention groups a plurality of control objects installed in an automobile according to their installation positions, and configures the control objects included in each group to be controllable by a corresponding terminal control unit. One central control section is provided for a plurality of terminal control sections, and the central control section and each terminal control section are connected by a data transmission line. Then, the central control section derives a test signal for operating all the control objects of a certain terminal control section and transmits it to the terminal control section via the data transmission line. The corresponding terminal control unit operates all the control objects, detects the operating state at that time, and transmits the detected operating state to the central control unit. The central control unit determines whether each controlled object operates normally or not based on the detection signal of the operating state of the controlled object and the test signal, and issues an alarm regarding the result.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram schematically showing an integrated wiring system for an automobile to which the present invention is applied. In the configuration, a master processor (hereinafter referred to as master MPU) 10, which is an example of a central control unit, is provided at a location near the driver's seat of the automobile (for example, under the dash board). A DC voltage is supplied to the master MPU 10 from the storage battery 1. The master MPU10 has
Operating means 2A and indicator 2B are connected. The operating means 2A includes various operating switches provided, for example, in relation to an instrument panel or a steering wheel.

Furthermore, terminal processors (hereinafter referred to as terminal MPUs) 20A to 20D, which are examples of terminal control units provided at appropriate locations in the automobile, are connected to the master MPU 10 via cables 30A to 30D. Each terminal
A plurality of control objects and/or detection objects (hereinafter collectively referred to as a group of control objects) 40A to 40D are connected to the MPUs 20A to 20D. Here, the controlled object refers to FIGS. 2A to 2 described later.
As explained with reference to Figure D, it refers to electrical components installed in automobiles, such as various lamps and wipers. Detection targets are various sensors that detect objects that are indicated by various indicators included in the instrument panel of an automobile. These control object groups 40A to 40D are a plurality of control objects grouped according to their arrangement positions, and terminals corresponding to each group.
It is controlled by the MPUs 20A to 20D. Here, although the illustration shows a case where there are four terminal MPUs, this is to represent a case where various control objects are divided and grouped on the front, rear, left and right sides of the automobile. For that purpose, the control target group 40
A includes various control objects provided on the front left side of the automobile, and the terminal MPU 20A is provided at a position close to the front left side of the automobile. Similarly, the control object groups 40B, 40C, and 40D are provided in relation to the front right part, rear left part, and rear right part of the automobile, respectively, and the terminal MPU 20 corresponds to the control object groups 40B, 40C, and 40D.
B, 20C and 20D are provided.

Figures 2A to 2D show each terminal MPU20A to 2.
FIG. 2 is a diagram schematically showing an example of a controlled object or a detected object connected to an output terminal or an input terminal of 0D. Therefore, each output terminal is connected to a signal line for the various control objects shown in the figure or a switch for activating these control objects. As is clear from the illustration, the output terminal and input terminal of each terminal MPU 20A to 20D each consist of a fixed number of bits (for example, 8 bits), and the operating state of the controlled object is determined by the logic state output from one bit. It is something to control. In addition, Figure 2B and Figure 2
As shown in Figure C, the data input to each of the terminal MPUs 20B and 20C is a value detected by a sensor for detecting the water temperature or a sensor for detecting the amount of gasoline, which is an example of the detection target. .

Further, although not shown in FIGS. 2A to 2D, the detected current of each controlled object is input to each terminal MPU 20A to 20D, respectively.

In this embodiment, the master MPU 10 itself also has a function as a terminal, and its input/output terminals are mainly connected to operating means (switch means) and indicators as shown in FIG. 2E. .
If the number of operating means is more than 1 byte (for example, 8 bits) as shown in the figure, the outputs of all the operating means are received as input using a plurality of bytes.

The types of objects to be controlled and objects to be detected connected to each of these terminal MPUs 20A to 20D and the master MPU 10 are merely examples, and differ depending on the model and type of vehicle.

FIG. 3 is a sectional view showing the specific structure of cables 30A to 30D. Cable 30A~30D
includes a power line 31, which is an example of a power supply line, in its center. A data transmission line 33 including a set of system power lines 32 and a set of optical fibers 331 and 332 is arranged around the power line 31 . The peripheral portion of each line or optical buffer is covered with an insulator 34.

FIG. 4 is a specific circuit diagram of an embodiment of the integrated wiring system which is a feature of the present invention. In addition, in the illustrated embodiment, the master MPU 10 and one terminal
The relationship with MPU (for example, 20A) is shown.

In the configuration, the master MPU 10 includes a central processing unit (hereinafter referred to as CPU) 11. CPU11 has
A program storage memory (hereinafter referred to as ROM) 13 and a data storage memory (hereinafter referred to as ROM) are connected via a bus line 12.
RAM) 14, transmission control circuit 15, and input/output interface 16 are connected. Also, the master
A system power supply circuit 17 for supplying power to each part is connected to the MPU 10. The input/output interface 16 includes each terminal MPU 20A to 20D.
An operating means 2A and various indicators 2B for instructing or selecting the operating states of a plurality of controlled objects corresponding to are connected. The operating means 2A includes a plurality of operating switches 2a to 2n.

The transmission control circuit 15 includes each cable 30A to 3.
1 included in 0D (only 30A is shown in the diagram)
Transmission buffer amplifiers 51a-51d and reception buffer amplifiers 58a-58b are connected to the pair of optical fibers 331, 332.

The terminal MPU (for example, 20A) includes a CPU 21, and a ROM 23, a RAM 24, and a transmission control circuit 2 connected to the CPU 21 via a bus line 22.
5 and an input/output interface 26. Furthermore, the terminal MPU 20A includes a system power supply circuit 27 for supplying power to each part. A reception buffer amplifier 54a and a transmission buffer amplifier 55a are connected to the transmission control circuit 25. The transmitting buffer amplifier 51a and the receiving buffer amplifier 54a are connected via an optical coupler 52a, an optical fiber 331, and an optical coupler 53a. The transmitting buffer 55a and the receiving buffer 58a are connected to an optical coupler 56.
a, an optical fiber 332, and an optical coupler 57a. System power supply circuit 27 is connected to storage battery 1 via system power supply line 32 .

A plurality of controlled objects included in the controlled object group 40A,
For example, a drive circuit is provided in connection with headlight 410 and wiper 415. This drive circuit includes
Power switch 4 connected in series to headlight 410
30 and a diode 441, a power switch 435 and a diode 445 connected in series to the wiper 415, and the like. These power switches 430...435 are connected to the positive terminal of the storage battery 1 via the power line 31. CPU
Each power switch 430...435 with 21 outputs
A driver 42 is provided to selectively turn on or off.

In addition, other terminals MPU20B to 20D are
The circuit configuration is the same as that of 20A, and the only difference is the group of controlled objects to be connected, so the detailed configuration will be omitted.

Figure 5A shows the RAM included in the master MPU 10.
14 is a diagram schematically showing fourteen storage areas. FIG.
The RAM 14 includes storage areas 14a to 14d used for testing the operating status of each terminal MPU 20A to 20D and the operating status of each control target group.
including. Each of the storage areas 14a to 14d corresponds to the terminal MPUs 20A to 20D, and has at least a 3-byte storage area M1 for each terminal MPU.
1 to M43. Here, areas M12, M1
3, M22, M23, M32, M33, M42, and M43 are used to store test data to be transmitted to each terminal MPU 20A to 20D, such as transmission/reception data matching check data. Areas M11, M21, M31, and M41 are used to temporarily store data transmitted from each terminal MPU 20A to 20D.

FIG. 5B is a diagram schematically showing a part of the storage area of the RAM 24 included in each terminal MPU 20A to 20D. In the figure, each terminal MPU
RAM24 included in 20A to 20D is the master
It includes areas (registers) R1 to R4 for temporarily storing data received from the MPU 10 or data to be transmitted to the master MPU 10. Each register R1 to R4 is stored in each terminal MPU20.
Control objects provided corresponding to A to 20D (i.e., loads L10 to L17, loads L20 to L27,
It includes bits corresponding to loads L30 to L37 and loads L40 to L47).

FIG. 6 is a time chart for explaining the operation in the test mode of one embodiment of the present invention. In particular, in the diagram, the test items include a transmission/reception data match check and a load disconnection check for each terminal.
Another data transmission period (indicated by RS#1 to RS#4 with these terminals MPU20A to 20D as terminal numbers) is shown. Here, the various tests or check operations performed in the test mode are as follows:
These include a transmission/reception data match check for checking the operating status of each terminal MPU 20A to 20D and disconnection of optical fibers 331 and 332, and a disconnection check for a control object, that is, a load connected to each terminal MPU 20A to 20D. These checks are performed immediately after power-up and before entering the normal operating routine.
In this case, the check operation procedure is as follows:
Check data is sent from terminal MPU 20A (RS #1) from terminal MPU 20A (RS
#2), 20C (RS#3), and 20d (RS#4) are repeated in this order. The transmitted/received data is, for example, 4 bytes long, and the first byte represents data (SDA) indicating the code or terminal number of the destination terminal MPU to which data is to be transmitted from the master MPU 10, and the next The terminal that sent the 1 byte (in this case, the master
Data (SSA) representing the terminal number of MPU10)
The remaining 2 bytes indicate control or test data.

7A and 7B are flowcharts showing the operation of checking the coincidence of transmitted and received data as an example of the test mode. In particular, FIG. 7A shows the operation flow on the master side, and FIG. 7B shows the operation flow on the master side as an example of the terminal.
The operation flow of MPU20A is shown.

Next, referring to FIGS. 1 to 7B, the operation of checking the coincidence of transmitted and received data will be described.

Immediately after the power is turned on, the CPU 11 included in the master MPU 10 performs initial settings for checking transmission/reception data consistency in step 11.
More specifically, this operation is performed in the storage area 14a.
~14d each 3-byte area M11,
This is done by setting and storing logic "1" in all bits of M12, M13 to M41, M42, and M43. Then steps 12-16
At this point, a transmission/reception data matching check operation is performed for the terminal MPU 20A. That is,
In step 12, the CPU 11 uses the terminal MPU
To specify 20A, set SDA to terminal number #1
Then, test data (data set in M12 and M13) in which all bits of 2 bytes are logic "1" is given to the transmission control circuit 15. Transmission control circuit 15
At the timing when the terminal MPU 20A is to be selected, the transmitting buffer amplifiers 51a to 51d are provided with destination data (SDA=#1) for selecting the terminal MPU 20A and test data in which all bits of 2 bytes are logic "1". This data is based on the optical fiber 331 included in each cable 30A to 30D.
The signal is supplied to the transmission control circuit 25 included in each terminal MPU 20A to 20D via the terminal MPU 20A to 20D. At this time, the terminal
The CPU 21 of the MPU 20A receives data from the master MPU 10 in step 21.
Then, in step 22, the destination data
SDA determines whether the data (#1) designates its own terminal, and if it determines that it is designated, it performs the operation of step 23. That is,
In step 23, the CPU 21 receives the received 2
A buffer 50a that transmits byte data as it is;
Optical coupler 56a, optical fiber 332, optical coupler 5
7a, it is transmitted to the transmission control circuit 15 via the reception buffer 58a.

On the other hand, after transmitting the test data in step 12, the CPU 11 enters a reception standby state in step 13. If response data is transmitted from any terminal MPU, it is determined whether the transmission source data SSA of the response data is terminal number #1 that specifies the terminal MPU 20A. If it is determined that the data is from the terminal MPU 20A, the process advances to step 15. In step 15, the CPU 11 determines whether all bits of the 2 bytes of received data are logical "1". If all bits are logical ``1'', the data sent as test data is being returned as is.
After determining that there is no data transmission error, that is, that the sent and received data match, the next terminal MPU2
Proceed to the 0B transmission/reception data match check operation. On the other hand, if all bits of 2 bytes of the received data are not logical "1", it is determined that a data transmission error has occurred, and the process proceeds to step 16.

The data transmission error determined here is the
The MPU20A cannot operate normally, or the optical fibers 331, 3 included in the cable 30A
For example, a disconnection has occurred in one of 32. Then, in step 16, the received 2-byte data is stored in areas M12 and M13.

In addition, terminal MPU20B, 20C and 20D
The transmission/reception data matching check operation is performed in step 1.
Since the operation is similar to that of the terminal MPU 20A except that the terminal numbers in 2 and 14 are 2, 3, or 4, detailed explanation thereof will be omitted.

In this way, each terminal MPU20A~20D
After checking the consistency of the transmitted and received data, the program proceeds to a load disconnection check routine shown in FIGS. 8A and 8B, which will be described later.

8A and 8B are flowcharts of a load disconnection check routine that is a feature of the present invention. In particular, FIG. 8A shows the operation flow on the master MPU 10 side, and FIG. 8B shows the operation flow on the terminal MPU (for example, the
0A) side operation flow is shown. Next, with reference to FIGS. 1 to 6, FIGS. 8A and 8B, the operation when performing a load disconnection check will be described. Here, the disconnection of the load means, if the object to be controlled is a lamp, a burnout of the lamp or a disconnection of the electric wire connecting the lamp and the power switch.

Steps 31 to 34 show the operation of the CPU 11 for checking the load disconnection of the terminal MPU 20A. That is, the CPU 11 performs step 3.
1, data for selecting the terminal MPU 20A and instructing all loads to turn on (for example, area M
11) is transmitted. On the other hand, CPU21 on the terminal MPU20A side
is initialized in step 41 (for example, all bits of register R1 are set to logic "1" and stored).
do. Then, in step 42, it enters a reception standby state. Next, CPU21 becomes master MPU1
When the data transmitted from 0 is received, in step 43 the data included in the received data is
Determine whether SDA is #1 or not. If SDA=
If #1 is determined, steps 44-4
At step 7, a disconnection detection operation for the load (controlled object) corresponding to the 0th bit shown in FIG. 2A is performed. That is, in step 44, the CPU 21 gives a signal to the driver 42 via the input/output interface 26 to turn on the load (L10: for example, the headlight 410) corresponding to the 0th bit.
Turn on the power switch 430. Subsequently, in step 45, the current of the load corresponding to the 0th bit is detected. This load current is detected, for example, based on the terminal voltage of a resistor connected between headlamp 410 and ground. In step 46, it is determined whether the detected current is zero. if,
If it is determined that the detected current is 0, the 0th
It is determined that the load corresponding to the bit is disconnected, and the process proceeds to step 47. In step 47, the CPU 11 writes logic "0" to the 0th bit of register R1.

On the other hand, if it is determined that the detected current is not 0, since the load corresponding to the 0th bit is not disconnected, a disconnection detection operation for the load corresponding to the 1st bit is called. This operation differs from the operations in steps 44 to 47 only in the number of the load to be tested and the bit in register R1 to which logic "1" is written when an abnormality is detected; other operations are almost the same. Since they are similar, they will be omitted. Thereafter, in the same manner, load numbers 2 to 7 (L12 to L17)
A disconnection detection operation is performed for each of the following. Then, when the disconnection detection operation of the plurality of loads corresponding to the terminal MPU 20A is completed, step 48
Proceed to. In step 48, data SSA is set to 1 and the contents of register R1 are set to master MPU1.
Send to 0. After that, the CPU of the terminal MPU20A
21 proceeds to normal operating mode.

On the other hand, CPU 11 included in master MPU 10
In step 32, each terminal MPU 20A~
Transmission data from 20D is being received. Then, in step 33, data SSA is #1
If it is determined that this is the case, the process advances to step 34.
In step 34, the received data from the terminal MPU 20A is written into the area M11.

After that, in the same way, CPU 11 is set to terminal MPU 20.
The operation for checking wires B, 20C, and 20D for disconnection is performed in sequence. This behavior is based on the terminal that should be specified.
Since the operations are almost the same as those in steps 30 to 34 except that the MPUs are terminal numbers 2 to 4, detailed explanation thereof will be omitted. After that, CPU11
The process advances to a failure alarm routine shown in FIG. 9, which will be described later.

FIG. 9 is a flowchart for performing failure processing and warning on the master MPU 10 side. Next, the operation of the failure processing/alarm routine will be explained.

In step 51, the CPU 11
It is determined whether or not all bits of M12 and M13 are logical "1". If logic "0" is stored in any of the bits, there is some abnormality in the terminal MPU 20A itself or the transmission system such as the corresponding cable 30A, so the process proceeds to step 52. In step 52, disconnection processing for the terminal MPU 20A is performed. This processing is performed so that, even when various switches included in the operating means 2A are operated, an operation command signal is not given to the terminal MPU 20A in order to prohibit the operation of the controlled object that should be operated based on the operation state of the switch. Make it. After step 52 or after determining in step 51 that logic "1" is stored in all bits in areas M12 and M13, the process advances to step 53. And step 53
At , it is determined whether or not logic "1" is stored in all bits in areas M22 and M23. If it is determined that logic "1" is not stored in all the bits in areas M22 and M23, in step 54 the terminal MPU 20
The separation process for B is performed. Thereafter, in the same manner, in steps 55 and 57, the terminal MPU 20
It is determined whether or not there is an abnormality in the controlled objects included in each of MPUs C and 20D, and the terminal MPU 20C or 20D corresponding to the controlled object with the abnormality
Decoupling takes place in steps 56 and 58.
Thereafter, the process advances to step 59.

In steps 59-62, the terminal MPU20A~
An alarm is issued for each 20D when an abnormality occurs. For example, in step 59, area M11
If any of the bits in the memory contents of
An alarm (or display) indicating the abnormality of A is issued. Here, as a specific example of the alarm (or display), the terminal MPU20A is displayed on the instrument panel.
An indicator lamp is provided for each 20D to give a visual warning, and the indicator lamp is turned on or off. Another method is to provide a numerical display for each terminal MPU20A to 20D.
By displaying the bit number that stores the occurrence of an abnormality using each numerical display, it is possible to display which control target (load) corresponding to which terminal MPU has an abnormality. . Further, the abnormal state warning is not limited to a visual one, but may be an auditory one using a buzzer or the like.

Note that steps 60 to 62 differ from the case of the terminal MPU 20A only in that steps 60 to 62 are performed based on the area corresponding to each terminal MPU in order to determine whether there is an abnormality or not, and are performed for each terminal MPU 20B to 20D. are similar, so detailed explanation thereof will be omitted.

After step 62, the normal operating mode (not shown in the flowchart) is entered. next,
The operation in the normal operation mode, for example, when the switch 2a for operating the headlight 410 (=L10), which is an example of a certain controlled object, is operated will be briefly described. In this case, a signal based on the operation of the operation switch 2a is input to the input/output interface 16. In response, the CPU 11 identifies the operated switch and sends the headlight 410 and destination data specifying the terminal MPU 20A to which the headlight 410 belongs in order to operate the headlight 410 corresponding to the switch. Control data representing activation is provided to the transmission control circuit 15. Transmission control circuit 1
5, when transmitting data by specifying each terminal MPU 20A to 20D in a time-sharing manner, the terminal MPU 20
At the timing when A should be selected, the data is given to transmission buffer amplifiers 51a to 51d corresponding to the plurality of terminal MPUs 20A to 20D. This data is transmitted to each terminal MPU 20A to 2 via an optical fiber 331 included in each cable 30A to 30D.
It is given to the transmission control circuit 25 included in 0D.
However, if the transmission control circuit included in each terminal MPU 20B to 20D does not match the data specifying its own terminal, the received data will be ignored, so as a result, the transmission control circuit 2 included in the terminal MPU 20A will
Only CPU 5 reads the received data and sends it to CPU 21.
give to In response, the CPU 21 provides a signal to the driver 42 via the input/output interface 26 to command the operation of the headlight 410, and turns on the power switch 430. By this,
The power switch 430 is turned on, and direct current from the storage battery 1 is supplied to the headlight 410 via the power switch 430 and the diode 440.
Headlight 410 turns on.

As described above, according to the present invention, in a system in which a plurality of control objects installed in an automobile are centrally wired, an abnormality in the central control section or terminal control section, an abnormality in the data transmission line, and a control object in each group can be detected. Unique effects such as being able to detect abnormalities and the like reliably and quickly are achieved. If this detection result is displayed or alerted to the driver, the driver can determine whether or not there is a problem with driving depending on the type of controlled object that has an abnormality, contributing to safe driving. It's also effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an embodiment of the present invention. 2A to 2D are diagrams schematically showing an example of a terminal MPU as an example of a terminal control unit and an example of control objects connected to each terminal MPU;
The figure is a diagram showing the relationship between the input/output terminals of the master MPU and each controlled object. FIG. 3 is a sectional view showing details of the cable. FIG. 4 is a specific circuit diagram of an embodiment of the present invention. Figures 5A and 5B
The diagram shows RAM 14 and each terminal MPU 20A to 20
3 is a diagram schematically showing a part of the storage area included in the RAM 24 of D. FIG. FIG. 6 shows a time chart in a test mode for explaining the operation of this embodiment. FIGS. 7A and 7B are flowcharts of the master MPU side and the terminal MPU to explain the matching check operation of transmitted and received data in an example of the test mode. FIGS. 8A and 8B show flowcharts of the load disconnection check operation for the master MPU and terminal MPU in another example of the test mode. FIG. 9 shows a flowchart of the failure handling/alarm routine. In the figure, 2A is the operating means, 10 is the master
MPU (central control unit), 20A to 20D are terminal MPUs
(terminal control unit), 30A to 30D are cables, 31
33 is an optical fiber (data transmission line), and 40A to 40D are objects to be controlled/detected.

Claims (1)

[Scope of Claims] 1. In a system in which a plurality of various control objects provided in an automobile are grouped according to their arrangement positions, and a certain number of control objects included in each group are consolidated and wired for each group, A device for intensively detecting abnormalities, comprising: a terminal control section provided for each group; an operating means, provided commonly in each of the terminal control units, derives a control signal for controlling the operating state of a controlled object corresponding to each terminal control unit based on the operating state of the operating means, and performs each control. a central control unit that remotely controls an object; an alarm means; and a plurality of cables connected between each of the terminal control units and the central control unit, each cable including at least a data transmission line, the central control unit a test signal generating means for generating a test signal for instructing the operation of all of the plurality of control objects included in each of the terminal control units, regardless of the operating state of the operating means; a control signal based on the control signal or a test signal output from the test signal generating means,
a first transmission control means that transmits terminal designation data specifying the certain terminal control unit to each terminal control unit via the data transmission line, and receives transmission data from each terminal control unit; failure determination means for determining whether or not there is a failure in a controlled object included in the terminal control section; each terminal control section controls the operating state of the corresponding controlled object in response to the control signal; drive control means for operating all controlled objects in the same group in response to the test signal; operating state detection means for detecting the operating state of each controlled object in the corresponding group when the test signal is applied; and the control signal. or receiving said test signal;
and a second transmission control means for transmitting an output signal of the operating state detection means to the central control unit via the data transmission line, and the failure determination means transmits a test signal transmitted to a certain terminal control unit. Based on the output signal of the operating state detection means transmitted from the terminal control unit in response to the
A vehicle aggregation system, characterized in that an abnormal operation of a controlled object included in the terminal control unit is determined, and the warning means issues an alarm in response to the failure determination means determining an abnormal operation of the controlled object. Abnormality alarm device in wiring system. 2. A storage battery is provided at a position related to the central control unit, and the cable is connected between the storage battery and a plurality of control objects corresponding to each terminal control unit, and the cable is connected to each control object from the storage battery. The abnormality warning device in an automobile integrated wiring system according to claim 1, further comprising a power supply line for supplying electric power. 3. The data transmission line is an optical fiber, and the central control unit and the terminal control unit convert the control signal, the test signal, or the output signal of the operating state detection means into an optical signal and send the converted signal to the optical fiber. means for supplying the
An abnormality warning device in an automobile integrated wiring system according to claim 1. 4. The first transmission control means sequentially transmits terminal specification data specifying each terminal control unit and test signals for testing a plurality of control targets included in the terminal control unit to each terminal control unit in a predetermined order. An abnormality warning device in an automobile centralized wiring system according to claim 1, which transmits an abnormality warning signal.