KR100229156B1 - Diagnostic system for a motor vehicle - Google Patents

Abstract

The present invention relates to diagnosing a magnetic failure in a vehicle, and more particularly, to a method for displaying a magnetic failure diagnosis in a vehicle in which a defect of a vehicle is automatically checked by an input of a magnetic failure diagnosis input key and displayed.

In the related art, when a vehicle has a defect, the driver and the mechanic have to use a separate device, such as a scanner, or identify a defect code by identifying a flashing state such as an engine maintenance instruction.

According to the present invention, when the driver and the mechanic enters only the input key of the self-diagnosis diagnosis, the driver and the mechanic automatically check the defect of the vehicle and display the contents of the corresponding defect so that the driver and the mechanic can easily know the minor In case of a breakdown, the driver can maintain it directly and it is also effective in preventing accidents.

Description

How to display self-diagnosis in the vehicle

The present invention relates to diagnosing a magnetic failure in a vehicle, and more particularly, to a method for displaying a magnetic failure diagnosis in a vehicle in which a defect of a vehicle is automatically checked by an input of a magnetic failure diagnosis input key and displayed.

If a fault occurs in a typical vehicle, the ECM (Electronic Control Module) provides a fault diagnosis system that notifies the fault of the system by setting a fault code to inform the driver and mechanic of the fault. It is. In addition, the self-diagnosis diagnosis system is equipped with an engine maintenance indicator on the instrument panel to inform the driver of the occurrence of a vehicle defect so that the vehicle can be maintained by a mechanic as soon as possible. It is always on when the ignition switch is turned on in the state and should be off when the engine is started.

In other words, the ECM, which has a built-in memory, is connected to sensors that can detect various vehicle operating conditions, so that the measured values of the sensors can be known. If the measurements are not the same, the corresponding engine maintenance indicator lights up to inform the operator of the occurrence of a fault and simultaneously stores the fault code in the memory. Here, the defect code refers to a code indicating the cause of each failure of the vehicle.

For example, the fault code is represented by a two-digit code. If the fault code is '13', there is an error in the oxygen sensor, and there is no voltage change as a possible cause of the fault. An error in the speed sensor may be that a pulse does not occur as a possible cause of the fault.

As described above, the engine maintenance indicator lights up so that the driver can know what defects have occurred in the vehicle, but it has not been known exactly what defects have occurred.

Therefore, in the related art, two methods can be used to encode a defect of a vehicle by using a defect code or to view a flashing state of the engine maintenance instruction. In the first case, a device called a scanner is used. In the second case, a jumper wire or the like is connected to an ALDL connector (Assembly Line Diagnostic Line Connector) provided in a fuse box of the vehicle. Here, the ALDL connector is a failure diagnosis connector, which is usually mounted at the upper side of the rear ECM pad of the front passenger's seat and has several terminals, which are used to check the normal operation state of the vehicle.

For example, the terminal `A 'on the corresponding ALDL connector represents a ground terminal,` B' represents a diagnostic terminal, `G 'represents a fuel pump terminal,` M' represents a continuous data terminal, and so on.

First, as a method using the scanner, the scanner detects a defect code stored in an ECM storage device through the `M 'terminal, which is a continuous information line, and indicates a code, thereby identifying the defect.

Secondly, it can be determined that the engine maintenance indicator is blinking. If the ignition switch is turned on after connecting the terminal 'B' and the ground 'A' of the ALDL connector with a jumper wire in the engine stop state, the engine malfunctions. It becomes the state which can perform diagnosis.

At this time, since the flickering state of the engine maintenance instruction light varies according to the defect code, it can be seen that the engine maintenance instruction light blinks.

For example, if there is no fault in the system, code '12' is repeatedly displayed until the terminal 'B' and ground 'A' of the ALDL connector are separated, that is, the blinking characteristic of the corresponding code '12' is turned on. The time is 0.4 seconds, the off time is 0.4 seconds, the digit interval is 1.2 seconds, and the code interval is 3.2 seconds.

However, for example, if a system fault occurs, the fault diagnosis code appears after the corresponding code `12 'appears three times, and the engine maintenance indicator is displayed three times as a flashing characteristic corresponding to the corresponding fault diagnosis code. In case of error, the number of fault diagnosis code is displayed three times in descending order, and then the code '12' is displayed three times.

However, when using the scanner, which is the first method, it is necessary to move the vehicle directly to the nearest workshop and use the scanner equipment to find the defect code. Therefore, even after a slight maintenance, you should always find the workshop and do not move the vehicle. When a defect occurs, the vehicle is moved, which may cause a big problem for the driver's safety. In addition, it is necessary to find the fault code by looking at the blinking state of the second method, such as the engine maintenance instruction, which is not only difficult for the driver to directly see and identify the blinking state, but also the fault state indicated by each defect cog by checking the blinking state directly. There was an inconvenience to confirm.

As described above, when a vehicle has a defect in the related art, a driver and a mechanic directly use a separate device called a scanner or identify a flashing state such as an engine maintenance instruction to find a defect code.

In order to solve the above problems, in the vehicle according to the embodiment of the present invention, the self-diagnosis display method automatically checks a vehicle defect when a driver and a mechanic input only an input key for self-diagnosis when a vehicle has a defect. The purpose of this is to display the contents of the defect and to easily inform the operator and mechanic.

Self-diagnosis display method in a vehicle according to an embodiment of the present invention for achieving the above object is to compare the measured values from the sensors and the specified setting value of the corresponding sensors to store the corresponding fault code when not identical First course; A second step of connecting the fault diagnosis terminal `B 'and the ground terminal` A' of the ALDL connector by checking the input of the self-diagnosis diagnostic key; A third step of checking whether there is the stored defective code after checking the on state of the ignition switch; A fourth step of, if there is no stored defect code, reading out normal contents from a memory unit to display that there is no defect, and flashing an engine maintenance instruction light normally; And if the stored defect code is present, a fifth process of reading out the defect contents corresponding to the defect code from the memory unit to display the defect contents and flashing the engine maintenance instruction lamp with a blinking characteristic corresponding to the defect contents. It is done.

1 is a block diagram showing a system for displaying a self-diagnosis diagnosis in a vehicle according to an embodiment of the present invention.

2 is a flowchart illustrating a method of displaying a diagnosis of a magnetic failure in a vehicle according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11 input 12: ECM

13: connection switch part 14: memory part

15 display unit 16 indicator light relay unit

As shown in FIG. 1, in a vehicle according to an exemplary embodiment of the present invention, as shown in FIG. 1, an input unit 11, an ECM 12, a connection switch unit 13, a memory unit 14, And a display unit 15 and an indicator light relay unit 16.

The input unit 11 applies a magnetic failure diagnosis key to the ECM 12 to perform a magnetic failure diagnosis when a vehicle fault occurs.

The ECM 12 detects an on state of the ignition switch, receives a magnetic failure diagnostic key through the input unit 11, applies control data to the connection switch unit 13, and detects various vehicle operating states. It is connected to the possible sensors and the measurement value is received from the corresponding sensors and compared with the prescribed setting value and generates a fault code, and if it is not the same, the fault content corresponding to the corresponding fault code is read from the memory unit 14 and the The relay signal corresponding to the defect code is applied to the indicator light relay unit 16 while being applied to the display unit 15.

The connection switch unit 13 connects the terminal 'B' of the ALDL connector to the ground 'A' according to the control data applied from the ECM 12.

The memory unit 14 stores the defect contents corresponding to the respective defect codes.

The display unit 15 receives the defect contents from the ECM 12 and informs the driver and the mechanic.

The indicator lamp relay unit 16 turns on / off the power applied to the engine maintenance indicator in accordance with the relay signal applied from the ECM 12.

The self-diagnosis display method in a vehicle according to an exemplary embodiment of the present invention will be described with reference to the flowchart of FIG. 2 as follows.

First, the ECM 12, which is connected to sensors that can detect various vehicle operating states and stores a specific setting value of the corresponding sensors with a built-in memory device, measures the sensors that detect the operating state of the vehicle. In step S1, the corresponding prescribed setting value stored in the storage device and the measured value applied from the corresponding sensors are checked and compared (step S2).

If the comparison result is the same, the measurement value is applied again from the sensors, and if the comparison result is not the same, after storing the defect code which is a code indicating the cause of each failure of the vehicle in the storage device ( Step S3) The following operation is continued.

When the driver presses the self-failure diagnosis key of the input unit 11 to display the self-diagnosis diagnosis in the event of a fault in the vehicle, the input unit 11 applies the self-failure diagnosis key to the ECM 12.

Accordingly, the ECM 12 confirms whether the magnetic failure diagnostic key is input from the input unit 11 (step S4), and then applies control data to the connection switch unit 13 (step S5). 13 connects the terminal 'B' and the ground 'A' of the ALDL connector according to the control data applied from the ECM 12 (step S6).

If the driver turns on the ignition switch after pressing the self-failure diagnostic key of the input unit 11, the ECM 12 confirms the on state of the ignition switch (step S7) and then stores the memory of the ECM 12. The defect code stored in the device is read, and it is checked whether the defect code has been read (step S8).

If the defect code is not read, i.e., no defect has occurred in the vehicle, the memory unit 14 reads the normal contents indicating that there is no defect (step S9) and controls the display unit 15 to indicate no defect. The driver is informed by displaying (step S10). At the same time, the ECM 12 applies a relay signal to the indicator light relay unit 16 to turn on / off the power applied to the engine maintenance indicator to perform normal flashing (step S11).

For example, it is repeatedly indicated by the blinking state corresponding to the code '12', that is, the blinking characteristic of the corresponding code '12' has a lighting time of 0.4 seconds, a lighting time of 0.4 seconds, a digit interval of 1.2 seconds, and a code interval of 3.2 Seconds.

On the other hand, if the defect code has been read, i.e., a defect has occurred in the vehicle, the ECM 12 reads out the defect contents corresponding to the read defect code from the memory unit 14 (step S12), and displays the display. The unit 15 is controlled to notify the driver by displaying the corresponding defect contents (step S13). At the same time, the ECM 12 applies and controls the relay signal corresponding to the read defective code to the indicator lamp relay unit 16, and the indicator lamp relay unit 16 is applied to the relay from the ECM 12. In response to the signal, the power applied to the engine maintenance instruction lamp is turned on / off to flash (step S14).

For example, three times as the flashing characteristic corresponding to the code '12' and then three times as the flashing characteristic for the defect code. If there are several defect points, the number of the defect code is in descending order. After the code is repeated three times, the code '12' is displayed three times.

As described above, when a fault occurs in a vehicle according to the present invention, if a driver and a mechanic input only an input key of a self-diagnosis diagnosis, the driver and a mechanic easily check the fault of the vehicle and display the contents of the fault. Known and minor faults can be repaired directly by the driver and have a great effect on accident prevention.

Claims (1)

A method for displaying a self-diagnosis diagnosis in a vehicle, the method comprising: a first step of comparing a measured value from sensors and a prescribed setting value of corresponding sensors and storing a corresponding fault code when they are not the same; A second step of connecting the fault diagnosis terminal `B 'and the ground terminal` A' of the ALDL connector by checking the input of the self-diagnosis diagnostic key; A third step of checking whether there is the stored defective code after checking the on state of the ignition switch; A fourth step of, if there is no stored defect code, reading out normal contents from a memory unit to display that there is no defect, and flashing an engine maintenance instruction light normally; And if the stored defect code is present, a fifth process of reading out the defect contents corresponding to the defect code from the memory unit to display the defect contents and flashing the engine maintenance instruction lamp with a blinking characteristic corresponding to the defect contents. Self-diagnosis display method in vehicle.

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