KR101255758B1 - Method for Checking Car Wiring - Google Patents

Abstract

Wiring condition checking method that can easily check not only permanent wiring problem in the vehicle but also intermittent disconnection or short circuit, and wiring condition checking device that can be used to implement it. In the case of checking for a short circuit, first, a constant voltage is generated in response to a user's command to supply the wiring in the vehicle, and detect a signal fed back on the wiring. Then, the change in the magnitude of the signal is monitored to determine whether the wiring is short. The detection signal is compared with the supply signal to determine whether the wiring is short. In addition, by applying electric power to the vehicle and measuring the potential on the wiring to determine whether the disconnection. Finally, the information on the disconnection / short circuit is displayed on the display together with the information on the detection signal.

Description

In-vehicle wiring check method {Method for Checking Car Wiring}

The present invention relates to a vehicle diagnostic method, and more particularly, to a diagnostic method by detecting an electrical signal.

An automobile is a complex machine composed of many mechanical parts, but various electronic parts are also employed. In order to increase fuel efficiency, safety, or convenience by monitoring or controlling vehicle conditions, the adoption of electronic equipment is increasing. As the adoption of electronics increases, the wiring for connecting them also increases correspondingly. As the wiring in the vehicle becomes more complicated and the amount of wiring increases, the possibility of disconnection or short circuit of the wiring due to defective or deteriorated wiring in the vehicle driving process also increases. Wiring problems can also be caused by overloading the associated electronics. If such disconnection or short circuit occurs, the electrical equipment may not operate normally, and in some cases, the vehicle may not be operated, or the vehicle and the driver may be in a dangerous situation.

If an unintentional disconnection or short circuit occurs in permanent form, there is no great difficulty for the operator or mechanic to recognize and repair it. However, in the case where disconnection or short circuit occurs intermittently, it is difficult to determine whether the problem has occurred in the related component or the wiring, and therefore, it may take a lot of time to determine the cause.

The disconnection or short-circuit of the wiring is usually visually confirmed, but this requires considerable care and time. Inspection equipment for checking wiring problems has also been proposed. For example, Published Utility Model No. 1998-22809 discloses a tester that can determine whether the wiring is shorted by turning on or off the display lamp while the contact terminal is in contact with a suspected failure part. However, even in the case of using such a device, it may be difficult to identify the disconnection or short circuit occurring intermittently unlike the permanent disconnection or short circuit.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a technical problem of the present invention is to provide a wiring state checking method that can easily check not only a permanent wiring problem in a vehicle but also an intermittent disconnection or short circuit.

In addition, another object of the present invention is to provide a wiring state checking apparatus that can be used to implement the above wiring state checking method.

In the wiring state checking method of the present invention for achieving the above technical problem, a predetermined supply signal is generated and supplied to the wiring in response to a user's command, while detecting and accumulating the signal fed back on the wiring. The detection signal is compared with the supply signal to determine whether the wiring is short. In addition, by applying electric power to the vehicle and measuring the potential on the wiring to determine whether the disconnection. Finally, the information on the disconnection / short circuit is displayed on the display together with the information on the detection signal.

In a preferred embodiment, the supply signal has a constant level, and in the determining step, it is determined whether the wiring is disconnected or shorted by comparing the detection signal with the level of the supply signal.

The supply signal may include first and second supply signals having different levels. In such a case, in the determining step, it is preferable to compare the detection signal with the level difference between the first and second supply signals to determine whether the wiring is disconnected or shorted.

On the other hand, the wiring state check apparatus of the present invention for achieving the above another technical problem is a control unit; And a signal interface unit for generating a predetermined supply signal in response to a control signal of the controller and supplying it to the wiring, and detecting a potential on the wiring in response to the control signal of the controller.

The control unit accumulates a detection signal detected through the signal interface unit; The detection signal is compared with the supply signal to determine whether the wiring is short-circuited, power is applied to the wiring, and the potential on the wiring is measured to determine whether the wiring is broken, and information about the disconnection / short circuit is detected. The ability to display with information about; Checking and displaying a control state of the actuator through a voltage level of the wiring around an actuator of the vehicle; And comparing the first signal level on the first point on the wiring line with the second signal level on the second point on the wiring line to detect and display the presence of an unintended resistance component on the wiring line.

According to the present invention, it is possible to easily check the disconnection or short circuit occurring intermittently in the vehicle.

In particular, since the measurement signal is displayed in waveform form like an oscilloscope with numerical data and an audio alarm is provided, the user can easily recognize the check result.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals will be used for the same or corresponding members. In the drawings,
1 is a block diagram of an embodiment of a wiring check system according to the present invention.
2 and 3 are views showing the shape of the signal interface device shown in FIG. 1, FIG. 2 is a perspective view of the signal interface device, and FIG. 3 is a front view showing a state in which cables are connected to the signal interface device.
4 is a block diagram illustrating an electrical configuration of an embodiment of the signal interface device shown in FIG. 1.
FIG. 5 is a circuit diagram illustrating a circuit for driving a starting motor of a vehicle as an example of a wiring inspection object.
6 is a flowchart illustrating an intermittent disconnection / short check process using the wiring check system of FIG. 1.
7A is a screenshot showing an initial display of execution of the wiring check program.
7B is a screenshot showing a wiring check execution screen.
8 is a view showing an injector electric system that is the target of the control state of the actuator.
FIG. 9 is a diagram illustrating an example of a circuit that is an object of checking whether a wiring voltage drop or an unexpected resistance component is present.

Referring to FIG. 1, a wiring check system according to a preferred embodiment of the present invention is suitable for checking whether a wire is disconnected or shorted, especially intermittent short circuit or disconnection, among the wirings 16 installed in the vehicle 10. And a notebook PC 100 and a signal interface (I / F) device 120 connected to the notebook PC 100 via a USB cable. In FIG. 1, reference numeral 12 denotes a battery installed in the vehicle 10, 14 ECU, and 16 any one of many wirings connected to the ECU 14 or a microprocessor (not shown).

The notebook PC 100 accepts a user's setting command input, controls the signal I / F device 120 to sample the measurement signal, and receives the measurement data from the signal I / F device 120 and displays it on the monitor. .

The notebook PC 100 is loaded with the wiring check program 101 according to the present invention and executed. The wiring check program 101 includes a setting unit 102, a control unit 104, a control signal transmitter 106, a measurement signal receiver 108, a storage unit 110, an output screen configuration unit 112, and an alarm generation. Part 114 is included.

The setting unit 102 receives a setting command input by a worker through a keypad or a mouse and transmits the setting command to the control unit 104. The control unit 104 controls the overall operation of the program 101. In particular, the control unit 104 transmits a control signal to the signal I / F device 120 through the control signal transmitter 106 according to the setting command, and causes the measurement signal receiver 108 to transmit the signal I / F device 120. Control to receive measurement data from The control signal transmitter 106 transmits a control signal to the signal I / F device 120 through the USB port 118 under the control of the controller 104. The measurement signal receiver 108 receives measurement data from the signal I / F device 100 through the USB port 118, stores the measured data in the storage 110, and provides the output data to the display screen 112.

The output screen configuration unit 112 constructs an output screen including signal waveforms and data and displays the measured data on the monitor under the control of the controller 104. The alarm generator 114 outputs an audio alarm through a speaker when an abnormality occurs in the measurement data, that is, a disconnection or a short circuit occurs in the in-vehicle wiring 16, and then alarms the output screen configuration unit 112. By providing a message, the output screen configuration unit 112 includes an alarm message indicating whether or not an abnormality through a color change or screen flickering on the output screen.

The signal I / F device 120 performs a measurement function in response to a control signal from the notebook PC 100. In detail, the signal I / F device 120 may measure voltage, resistance, frequency, signal duty ratio, etc. through a probe, and measure the measured data as the present value, the maximum value, the minimum value, and the average value. It is provided to the notebook PC 100 in the form of (AVG) or the like. In addition, the signal I / F device 120 may provide the measurement data to the notebook PC 100 in a periodically sampled format so that the notebook PC 100 outputs the measurement data in an oscilloscope waveform format.

On the other hand, the signal I / F device 120 may output an AC signal having a predetermined level of DC voltage or a specific frequency through the probe, and may output an actuator driving signal for arbitrarily driving an actuator of the vehicle. .

In particular, in connection with the wiring check of the present invention, the signal I / F device 120 measures the potential at any point on the wiring 16 or directs the predetermined level of DC voltage to any point on the wiring 16. After supplying, the potential at that point or elsewhere can be measured.

2 and 3 show the shape of the signal I / F device 120, FIG. 2 is a perspective view of the signal I / F device 120, and FIG. 3 shows the cables connected to the signal I / F device 120. Front view showing the connected state.

2 and 3, the signal I / F device 120 is in a substantially rectangular parallelepiped form. One side of the signal I / F device 120 is provided with a plurality of probe jacks 122, 124, and 126 for inserting the plugs of the probe cables 132, 134, and 136, respectively. On the other hand, the other side of the signal I / F device 120 is provided with a mini USB jack 128 and a power supply jack 129 for connection with a PC. In a preferred embodiment, the signal I / F device 120 operates by receiving direct current power from the battery 12 of the vehicle through the power cable 139.

A pair of probes 142a and 142b is provided on the probe cable 132 that can be coupled to the probe jack 122 of the first channel. A pair of probes 144a and 144b is provided on the probe cable 134 that can be coupled to the probe jack 124 of the second channel. The probe cable 136, which can be coupled to the probe jack 126, is provided with a current sensor 146 for detecting the current of any one wire.

In the signal measurement through the probe jacks 122 and 124, an individual ground may be applied or a common ground may be applied. When separate grounding is applied, the first and second probes 142a, 142b of the first channel support one oscilloscope channel in pairs. On the other hand, when common ground is applied, each of the first and second probes 142a and 142b of the first channel supports separate oscilloscope channels. Similarly, when separate grounding is applied, the first and second probes 144a, 144b of the second channel support one oscilloscope channel in pairs. On the other hand, when common ground is applied, each of the first and second probes 144a and 144b of the second channel supports separate oscilloscope channels. Thus, up to four oscilloscope channels can exist.

Meanwhile, the first probe 142a of the first channel may also be used to supply the actuator driving signal. In addition, the first probe 144a of the second channel may also be used to supply a DC voltage or an AC signal for simulation or wiring inspection purposes.

4 shows the electrical configuration of one embodiment of the signal I / F device 120 shown in FIG. The signal I / F device 120 includes a USB port 124, a controller 150, a memory 152, first to fifth signal measuring units 160a to 160e, an actuator control unit 172, A signal transmitter 174 and a power supply circuit 190 are provided.

The controller 150 controls the overall operation of the device 120 in response to a control signal from the USB port 124. Specifically, according to the operation mode, the controller 150 may measure the measurement data detected by the first to fifth signal measuring units 160a to 160e through the probes 142a, 142b, 144a, and 144b and the current sensor 146, respectively. It transmits to the notebook PC 100. In addition, the controller 150 causes the actuator controller 172 to output an actuator driving signal through the first probe 142a of the first channel, or the signal transmitter 174 to output a predetermined level of DC voltage or a specific frequency. The branch may output an AC signal through the first probe 144a of the second channel.

The memory 152 temporarily stores digital measurement data supplied from the first to fifth signal measuring units 160a to 160e to the control unit 150 and data transferred from the control unit 150 to the signal transmitting unit 174.

The first signal measuring unit 160a includes a sampling circuit 162a and an analog / digital (A / D) converter 164a. The sampling circuit 162a samples a signal detected through the first probe 142a of the first channel in accordance with a triggering signal from a trigger circuit (not shown) every regular period, for example every 250 ms. The A / D converter 164a converts the sampled measurement signal into a digital value.

Similarly, the second signal measuring unit 160b includes a sampling circuit 162b for sampling a signal detected through the second probe 142b of the first channel, and an A / D converter for converting the sampled measurement signal into a digital value. 164b is provided. The third signal measuring unit 160c includes a sampling circuit 162c for sampling a signal detected through the first probe 142c of the second channel, and an A / D converter 164c for converting the sampled measurement signal into a digital value. ). The fourth signal measuring unit 160d includes a sampling circuit 162d for sampling a signal detected through the second probe 142c of the second channel, and an A / D converter 164d for converting the sampled measurement signal into a digital value. ). The fifth signal measuring unit 160e includes a sampling circuit 162e for sampling a signal detected by the current sensor 146 and an A / D converter 164e for converting the sampled measurement signal into a digital value.

The input terminal of the first signal measuring unit 160a is connected to the first probe 142a of the first channel through the switch 170 and the probe jack 122. In addition, the output terminal of the actuator controller 172 is connected to the first probe 142a of the first channel through the switch 170 and the probe jack 122. The switch 170 selectively connects the probe jack 122 to the actuator control unit 172 or the first signal measuring unit 160a, so that the actuator driving signal output from the actuator control unit 172 is the first probe 142a. The signal is sensed through the first probe 142a or is transmitted to the first signal measuring unit 160a.

The switch 180 selectively connects the output terminal or the ground of the second signal measuring unit 160b to the controller 150 according to the individual grounding mode or the common grounding mode. In the individual ground mode, the switch 180 connects the output terminal of the second signal measuring unit 160b to the control unit 150, and is sensed by the second probe 142b of the first channel to detect the second signal measuring unit ( The signal measured by 160b may be transmitted to the controller 150. In the common ground mode, the switch 180 connects the ground to the controller 150 instead of the output terminal of the second signal measuring unit 160b so that the signal sensed by the second probe 142b of the first channel is controlled. To be delivered to 150.

When the first channel is in the common ground mode, the controller 150 receives the signals measured by the first and second signal measuring units 160a and 160b separately. On the other hand, when the first channel is in the individual ground mode, the controller 150 does not accept the difference between the signals measured by the first and second signal measuring units 160a and 160b as one signal.

The output terminal of the signal transmitter 174 is directly coupled to the input terminal of the third signal measuring unit 160c and connected to the first probe 144a of the second channel. Accordingly, the first probe 144a of the second channel may output a DC voltage or an AC signal from the signal transmitter 174. You can also detect the signal at the point where the probe is in contact. Here, the signal transmitter 174 is configured to prevent the signal on the wiring from flowing back. In one embodiment, the signal transmitter 174 low-pass filters the signal from the D / A converter 176 and the D / A converter 176 to convert the values supplied from the controller 150 to an analog signal And an output circuit 178 for amplifying and outputting.

The switch 182 selectively connects the output terminal or the ground of the fourth signal measuring unit 160d to the controller 150 according to the individual ground mode or the common ground mode. In the individual ground mode, the switch 182 connects the output terminal of the fourth signal measuring unit 160d to the control unit 150, and is sensed by the second probe 144b of the second channel to detect the fourth signal measuring unit ( The signal measured by 160d) may be transmitted to the controller 150. In the common ground mode, the switch 182 connects the ground to the control unit 150 instead of the output terminal of the second signal measuring unit 160d so that the signal sensed by the second probe 144b of the second channel is controlled. To be delivered to 150.

When the second channel is in the common ground mode, the controller 150 individually receives the signals measured by the third and fourth signal measuring units 160c and 160d. On the other hand, when the second channel is in the individual ground mode, the controller 150 does not accept the difference between the signals measured by the third and fourth signal measuring units 160c and 160d as one signal.

The power supply circuit 190 receives DC power from the battery 12 of the vehicle through the power cable 134 and adjusts the voltage level to supply each part of the signal I / F device 120.

Hereinafter, the wiring inspection method using the wiring inspection system shown in FIG. 1 will be described.

5 shows a circuit for driving a starter motor of a vehicle as an example of a wiring check object. In FIG. 5, electrical energy generated by the alternator 200 is stored in the battery 12. The starter motor 220 is connected to the first terminal 212 of the relay 210, and the second terminal 214 of the relay 210 is connected to the battery 12 through the fuse box 202. Meanwhile, the control line terminal 216 for driving the solenoid of the relay 210 is connected to the key switch 230 through the fuse 232.

In such a circuit, when the output terminal 232a of the fuse 232 is intermittently disconnected or short-circuited or a momentary contact failure occurs, the driver may switch the key switch 230 even if the key switch 230 is inserted to start the vehicle. The switching signal of 230 may not be transmitted to the relay 210 and may not be started. If such disconnection or short circuit occurs in a permanent form, there is no great difficulty for the operator or mechanic to recognize and repair it, but if the disconnection or short circuit occurs intermittently, the problem may be caused by the relevant parts or by wiring. It is difficult to check.

In this case, the mechanic can use the wiring check system of FIG. 1 to determine whether the problem is due to an intermittent disconnection or short circuit on the wiring. 6 is a flowchart illustrating an intermittent disconnection / short check process using the wiring check system of FIG. 1.

First, the mechanic connects the notebook PC 100 with the signal I / F device 120, and connects the measuring probe 142a of the probe cable 132a to a point where there is a possibility of intermittent disconnection or short circuit or an upstream point thereof. The wiring check program 101 is executed in the notebook PC 100 before and after the probe connection. 7A shows an execution initial screen of the wiring check program 101. At the bottom of the initial screen, a hotkey or menu item for 'wiring check' is provided. The mechanic selects the wiring check function by selecting the 'wire check' hot key (step 250).

Subsequently, the mechanic selects the 'intermittent disconnection and short circuit check' tab on the wiring inspection execution screen of FIG. 7B and sets the voltage range and storage time of the supply signal, that is, measurement time (step 252). For example, the voltage range can be selected from 24V, 12V, and 5V. When the execution button or the play button is selected after the voltage range is set (step 254), the intermittent short circuit check process of steps 256 to 250 and the intermittent disconnection check process of steps 262 are performed.

In step 256, the control unit 104 of the wiring check program 101 transmits an intermittent short-circuit check function and a control signal indicating the voltage range to the signal I / F device 120 through the control signal transmitter 106.

In response to the control signal, the signal I / F device 120 generates a supply signal of a level selected by the user, and thus, the first probe 144a of the second channel and the measurement probe 142b of the probe cable 132b. Output through Meanwhile, the signal I / F device 120 samples the measured signal detected through the first probe 144a of the second channel and converts the measured signal into a digital value, thereby converting the digital measured data into a wiring check program (for the notebook PC 100). 101) (step 258). While supply and measurement of the supply signal are performed, it is desirable for the mechanic to shake the wiring to be checked, but the present invention is not limited thereto.

The wiring inspection program 101 accumulates digital measurement data for a storage time set by an operator. Simultaneously with data storage, the wiring check program 101 restores the signal waveform of the measurement signal from the digital measurement data, and displays the restored signal waveform and data on the monitor. In addition, the wiring check program 101 compares the supply signal and the measurement signal to determine whether there is a short circuit, and when it is determined that a short circuit has occurred, outputs an audio alarm through the speaker and changes color of the measured data or flickers the screen. An alarm message indicating an abnormality is displayed through step S260. The occurrence of a short circuit may be performed by stopping the measurement data and / or comparing the measurement data level with a reference value. Here, the reference value may be set in advance in the program or may be set by the user.

On the other hand, the mechanic can check the intermittent disconnection according to the program guide. In the case of checking for disconnection, the mechanic contacts the first probe 142a of the first channel or the first probe 144a of the second channel behind the point where the disconnection is suspected in the wiring, and then the key switch, for example, in FIG. The electric power is applied to the vehicle by operating 230. At this time, the signal I / F device 120 samples the signal detected through the probe and supplies it to the notebook PC 100, and the wiring check program 101 of the notebook PC 100 displays the accumulated measurement data. In operation 262, it is determined whether power is normally supplied through the wiring or disconnection is occurring.

As a result, the mechanic can determine whether an intermittent disconnection or short circuit occurs in the wirings before and after the first probe 144a of the second channel.

Meanwhile, the wiring check system of FIG. 1 may be used for various vehicle condition checks in addition to intermittent disconnection / short circuit checks. The vehicle's electronic control unit (ECU) includes a variety of idle speed control actuators (ISCA), crankshaft position sensor (CKPS), camshaft position sensor (CMPS), throttle position sensor (TPS), and exhaust gas recirculation (EGR) sensors. Controlling actuators for fuel injectors, EGR, etc., based on the signals detected by the sensors, the wiring check system of FIG. 1 can be used to check the control status of the actuators.

8 shows the injector electric system that is the target of the control state check of the actuator. The mechanic contacts the first probe 142a of the first channel between the injector 300 and the actuator 310 output terminal 312, executes the wiring check program 101 on the notebook PC 100, and then Control status check function can be executed by selecting 'Control status check' tab on the wiring check execution screen of 7b. In this case, the signal I / F device 120 samples the measured signal detected through the first probe 142a of the first channel and converts the measured signal into a digital value, thereby checking the wiring of the notebook PC 100. Supply to the program 101. The wiring inspection program 101 stores the digital measurement data for the storage time set by the operator, and simultaneously displays the signal waveform and data of the measurement signal from the digital measurement data on the monitor. In addition to outputting an alarm, an alarm message indicating abnormality is displayed through color change or flickering of the measurement data. Even when there is no abnormality in the measurement data, the sound may vary depending on the frequency of the measurement signal to indicate the control state.

On the other hand, the wiring of the vehicle may have a very long length depending on the part, and as the wiring material is bad or aged, an unexpected resistance component may be present. The wiring check system of FIG. 1 can also be used to detect the presence of such unintended resistance components or the voltage drop in the wiring.

9 shows an example of a circuit to be checked for the presence of an unexpected voltage drop or an unexpected resistance component. The mechanic contacts the first probe 142a of the first channel to the upstream ground wiring 16 and the second probe 142b of the first channel to a downstream point such as ground on the wiring 16, and then the notebook PC. Run the wiring check program 101 at 100 and select the 'voltage drop and resistance' tab or the 'power ground / control line check' tab on the wiring check execution screen of FIG. You can check for the presence of. For example, in FIG. 9, the first probe 142a of the first channel is brought into contact with the ground terminal 322 of the throttle position sensor TPS 320, and the second probe 142b of the first channel is connected to the opposite end of the wiring ( 330 or the check operation may be performed in contact with the battery negative terminal.

Even in such a case, the signal I / F device 120 samples the measured signal detected through the probe cable 132 of the first channel while supplying a supply signal through the first probe 144a of the second channel and digitally. The value is converted into a value, and the digital measurement data is supplied to the wiring check program 101 of the notebook PC 100. The wiring inspection program 101 stores the digital measurement data for the storage time set by the operator, and displays the signal waveform and the data of the measurement signal from the digital measurement data on the monitor. When there is a resistance component, an audio alarm is output through the speaker, and an alarm message indicating abnormality is displayed by changing color of the measured data or flickering the screen.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

For example, although the notebook PC 100 is illustrated as a terminal in which a user inputs a command and outputs a result, the data terminal is not limited thereto and other terminals may be used.

In addition, a data terminal such as the notebook PC 100 and the signal I / F device 120 may be integrated.

On the other hand, in the above description has been described with reference to the embodiment of supplying a supply signal of a constant level or a level that varies in time through a single measuring probe 142a to the wiring, in the other embodiment of the present invention two measurements The supply probe supplies two supply signals with different levels, for example +5 volts and -5 V, to the wiring and checks the wiring as to whether or not the detected signal corresponds to the difference between the two supply signals. It may be. In such a case, either of the two measuring probes may be used for detection or a third probe may be used. As such, the signal supply and detection may be applied differently depending on the product.

Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: vehicle, 12: battery, 14: ECU, 16: wiring
100: Notebook PC
120: signal interface (I / F) device
122: first channel probe jack, 132: first channel probe cable
124: second channel probe jack, 134: second channel probe cable
126: third channel probe jack, 136: third channel probe cable
128: mini USB jack, 129: power jack
139: power cable
142a: first channel first probe, 142b: first channel second probe
144a: first channel first probe, 144b: first channel second probe
146: current sensor
200: alternator, 202: fuse box
210: relay, 212: first terminal, 214: second terminal, 216: control line terminal
230: key switch, 232: fuse
300: Injector, 310: Actuator, 312: Output terminal
320: throttle position sensor (TPS)

Claims (8)

As a method for checking wiring in a vehicle,
(a) detecting and accumulating a signal fed back on the wiring while generating and supplying a supply signal for diagnosis in response to a user's command;
(b) comparing the detection signal with the supply signal to determine whether the wiring is short;
(c) applying power to the vehicle and measuring potential on the wiring to determine whether the wire is broken; And
(d) displaying information on the disconnection / short circuit together with the information on the detection signal;
Wiring check method comprising a. The method of claim 1, wherein the supply signal has a constant level,
And (b) and (c), wherein the level of the detection signal and the supply signal are compared to determine whether the wiring is disconnected or shorted. The method of claim 1, wherein the supply signal has a periodic waveform,
And in (b) and (c), comparing the waveforms of the detection signal with the supply signal to determine whether the wiring is disconnected or shorted. The method of claim 1, wherein the supply signal comprises a first supply and a second supply signal of different levels,
And (b) and (c), wherein the detection signal is compared with a level difference between the first and second supply signals to determine whether the wiring is disconnected or shorted. As a device for checking the wiring in the vehicle,
A control unit; And
A signal interface unit generating a supply signal for diagnosis and supplying the supply signal to the wiring in response to a control signal of the controller, and detecting a potential on the wiring in response to the control signal of the controller;
Equipped with
The control unit
A function of accumulating a detection signal detected through the signal interface unit;
The detection signal is compared with the supply signal to determine whether the wiring is short-circuited, power is applied to the wiring, and the potential on the wiring is measured to determine whether the wiring is broken, and information about the disconnection / short circuit is detected. The ability to display with information about;
Checking and displaying a control state of the actuator through a voltage level of the wiring around an actuator of the vehicle; And
Comparing a first signal level on a first point on the wiring line with a second signal level on a second point on the wiring line to detect and display the presence of an unintended resistance component on the wiring line;
Wiring checker that can perform The method according to claim 5, wherein the supply signal has a constant level,
In the controller performing the determination function for the disconnection / short circuit, the wire check device for determining whether the disconnection / short circuit by comparing the level of the detection signal and the supply signal. The method according to claim 5, wherein the supply signal has a constant level,
In the controller performing the determination function for the disconnection / short circuit, the wiring check device for comparing the detection signal and the waveform of the supply signal to determine whether the disconnection / short circuit. The method of claim 5, wherein the supply signal includes a first supply and a second supply signal having a different level,
In the controller performing the determination function of the disconnection / short circuit, the wiring check device to determine whether the disconnection / short circuit by comparing the detection signal with the level difference between the first and second supply signal.

Images