JP4015715B2 - Multiple display device for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automotive multiple display device that is mounted on a vehicle and displays operation information, warning information, and the like of various devices constituting the vehicle.
[0002]
[Prior art]
Various indicator lights (indicators) that are turned on when lights, auto-cruise devices, or the like, or when an engine, a braking device, or the like fails, are arranged in a meter cluster of an automobile. The indicator lights are lit based on operation information and warning (abnormality) information from electronic control units (ECUs) and sensors that control each device, and attention is given to passengers by various identification symbols drawn on the display screen. Or give a warning.
[0003]
In recent years, the number of items to be displayed has increased to several tens (30 to 50) with the increase in various devices in order to improve the number of auxiliary equipment accompanying the enhancement of performance and functionality of automobiles and the safety and comfort of passengers. However, if these are to be displayed by individual indicator lights, a large number of indicator lights must be arranged in a limited space on the meter cluster, which makes layout extremely difficult. Moreover, the individual indicator lights are inevitably small and difficult to recognize. In view of this, a multiple display device has been proposed in which a display such as a relatively large liquid crystal display (LCD) is arranged at the center of the meter cluster so that a plurality of displays can be performed.
[0004]
[Problems to be solved by the invention]
By the way, an electronic control unit (ECU) is mounted for each device, and when the mounted electronic control device is different due to a difference in specifications such as a truck, multiplexing corresponding to the combination of mounted electronic control devices is possible. It is necessary to set a display controller (multi-warning controller), resulting in an increase in controller variations. Furthermore, when the signal line between the warning indicator lamp and each electronic control device is broken or the connector is disconnected, an alarm may not be generated even if an abnormality actually occurs.
[0005]
Also, since the abnormal signal sent from the electronic control unit of each device is displayed on the display as it is, the alarm lamp from the electronic control unit for engine control is turned on at the time of the stall, and an abnormality occurs. It is unknown whether it is a disconnection detection signal or not. Furthermore, since an abnormal signal is always output when the alarm condition is satisfied, even if the key switch is simply turned off, an exaggerated alarm is generated by a voice message, causing unnecessary anxiety to the driver. It may give a feeling.
[0006]
Furthermore, since the meaning of the display mode cannot be changed with the same display color in a multiple display display, it is not possible to effectively deal with an increasing number of display items, particularly in a caution item with a large number of items. However, there is a problem that it is difficult to clearly recognize the warning display (failure) and the indicator display (operation).
[0007]
The present invention has been made in view of the above points, and a first object is to prevent an increase in variation due to a combination of a large number of electronic control devices due to differences in vehicle specifications. The second object is to prevent alarm leakage due to disconnection or disconnection of the signal lines between the electronic control device and the warning indicator for each equipment. The third purpose is to prevent false alarms such as engine stalls. The fourth object is to improve the credibility of an alarm by causing an alarm by a voice message only for an abnormality that is not reset when the key switch is turned off. The fifth object is to make it easy to recognize content with many display items by changing the meaning of the display mode in the same color.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, a plurality of electronic control devices mounted on an automobile and the electronic control device are connected, and display items corresponding to output signals from the electronic control device are operated. In an automotive multiple display device having a multiple display controller to be displayed on an indoor display unit, Check signal request means for external operation, each of which outputs an initial check signal from each of the plurality of electronic control devices, Connected to the multiple display controller Power A child control device is stored in the multiple display controller Storage execution means for external operation Has initialization means The multiple display controller sequentially displays the connection status of each electronic control unit on the display unit at predetermined intervals in response to the initial check signal, and when the storage execution unit is externally operated, the multiple display controller displays the electronic display unit. The control device was memorized. Is.
[0009]
Different vehicle specifications result in different numbers of items to be displayed on the multiple display device. Therefore, when the vehicle is completed, an in-vehicle electronic control unit (ECU) sends an initial check signal to the multiple display controller to store the vehicle specifications. As a result, the multiple display controller can be shared, and there is no need to prepare a multiple display controller for controlling the multiple control device for each specification due to differences in vehicle specifications.
[0010]
In claim 2 , Further In addition, a connection status determination means for determining a connection status between the multiple display controller and the plurality of electronic control devices,
When it is determined that the multiple display controller and the plurality of electronic control devices are disconnected, a warning is displayed on the display unit to indicate the electronic control device determined to be disconnected. Make It is what I did.
Claim 3 Then, the connection status determination means is the value stored in the multiple display controller. Initial check signal output from the plurality of electronic control devices by operation of the check signal request means And when both do not match, it is determined that the wire is disconnected.
Claim 4 Then, said plural Electronic control unit At least one of For the multiple display controller Able to output an abnormal degree signal that represents a specific abnormal degree. Multiple signal lines Including an electronic control device that can output the abnormality degree signals representing different degrees of abnormality from the plurality of signal lines, and from the electronic control device From the signal lines to the multiple display controller Degree of abnormality When signals are input at the same time, The degree of abnormality from each signal line The warning is not displayed.
[0011]
To distinguish the degree of abnormality from engine electronic control devices, semi-A / T electronic control devices, etc., alarms / displays that require immediate stop, alarms / displays that can be run but require early inspection, etc. Several types of alarms can be output. Since these alarms cannot be output at the same time, if they are output at the same time, the alarm is not issued because disconnection is being detected.
[0014]
The colors that can be lit on the display in the meter cluster of the car are green (normal state), red (unable to drive as it is), orange (despite being able to drive but requiring attention) The three colors are defined. Of these, only two colors, red and orange, can represent the abnormal state of the in-vehicle device. Therefore, the background color and the character color are highlighted while being the same color, and the meaning of the display mode is changed with the same color.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples.
FIG. 1 shows an outline of an instrument panel of a driver seat of a vehicle equipped with a multiple display device according to the present invention, for example, a large truck. The meter cluster 2 of the instrument panel 1 is provided with various meters such as a speedometer, a tachometer, a fuel gauge, a water temperature gauge, an air gauge, a warning indicator (single display unit) 3, and a multiple display display (display unit) 4. Yes. Further, for example, a multiple display changeover switch 5 is arranged at the lower left position of the meter cluster 2 on the instrument panel 1. The warning indicator 3 is disposed at the upper central position of the meter cluster 2, and the multiple display 4 is disposed at the central portion of the meter cluster 2. The warning indicator 3 is composed of a large number of display units for individually displaying each display item defined in safety standards such as a left / right turn signal indicator lamp, an oil pressure warning lamp, and a beam indicator lamp.
[0017]
FIG. 2 shows a schematic configuration of the multiple display device of the present invention. The vehicle is equipped with an electronic control device (hereinafter referred to as “ECU”) (operation state detection device) for controlling various devices including the engine. The vehicle includes, for example, an engine ECU 11, an automatic transmission (A / T) ECU 12, a friction clutch type automatic transmission (hereinafter referred to as “semi A / T”) ECU 13, an anti-spin regulator (ASR) ECU 14, a power steering (hereinafter referred to as “ A power steering ECU 15, an air suspension (hereinafter referred to as “air suspension”) ECU 16, an airbag ECU 17, and the like are mounted. Each of these ECUs 11 to 17 is connected to a multiple display controller (ECU) 19, and outputs an abnormality signal to the multiple display controller 19 when an abnormality is detected. The mounted ECU differs depending on the vehicle specification.
[0018]
The multiple display controller 19 includes a number of sensors such as a vehicle speed sensor, a fuel consumption sensor, an alternator L terminal, a door sensor, a water temperature sensor, an air pressure sensor, an oil level sensor, and a hydraulic sensor (all not shown). It is connected. Further, sensors (not shown) are also connected to the ECUs 11 to 17, respectively.
The multiple display controller 19 is connected to the multiple display display 4 and the multiple display changeover switch 5. Furthermore, a voice alarm system 20 as shown in FIG. 3 is connected to the multiple display controller 19. The multiple display controller 19 outputs a mute signal to the radio audio device 21 at the time of alarm, narrows down the radio sound, and adds an audio signal corresponding to the alarm content to the speaker 22 to issue an alarm. The ECUs 11 to 17 and the multiple display controller 19 are activated when the key switch 10 is on.
[0019]
The multiple display 4 is composed of a large LCD (liquid crystal display unit) and can display three colors of red, orange, and green. As shown in FIG. 1, the multiple display selector switch 5 includes a mode switch 6, a select switch 7, and a set / reset switch 8, and each of these switches 6 to 8 includes a multiple display controller 19. It is connected to the. The multiple display controller 19 drives and displays the multiple display display 4 based on signals from the multiple display changeover switch 5, the ECUs 11 to 17, the sensors, and the like.
[0020]
The operation will be described below.
First, initialization of multiple display will be described.
When the mounted ECUs are different due to differences in vehicle specifications, such as a truck, setting multiple display controllers corresponding to each combination will increase controller variations. Therefore, the multiple display controller 19 is initialized for the mounted ECU, and the connected ECU is learned and stored. This initialization is performed when the vehicle is assembled (at the time of shipment). This is also performed when another option is added after shipment and an ECU is additionally installed.
[0021]
The operator turns on the key switch 10 while simultaneously pressing the mode switch 6 and the select switch 7 of the multiple display changeover switch 5 from the state in which the key switch 10 is turned off. Thereby, the multiple display controller 19 shifts to the learning mode. When the key switch 10 is turned on, initial check signals are output from the ECUs 11 to 17 and input to the multiple display controller 19. These initial check signals are written and stored in the nonvolatile memory of the multiple display controller 19, and are retained even when the power source (battery) is removed. It can be rewritten any number of times. After a predetermined time, for example, about 5 seconds, after the key switch 10 is turned on, the multiple display controller 19 determines the connection status of the mounted ECUs 11-17, and connects the connected ECUs 11-17 for a predetermined time, for example, The images are sequentially displayed on the multiple display 4 at intervals of 3 seconds. FIG. 4 shows the relationship among the ECU, the display screen of the multiple display 4, and the background color of the multiple display 4 at this time.
[0022]
First, the multiple display controller 19 performs an abnormality display by the engine ECU 11. The abnormality of the engine includes an abnormality that disables traveling and an abnormality that allows traveling. In the case of an abnormality in which traveling is impossible, “engine control” is displayed on the display screen, and the background color is “red”. In the case of an abnormality in which traveling is possible, “engine control” is displayed on the display screen, and the background color is “orange”. These two abnormal displays are sequentially displayed at intervals of 3 seconds.
[0023]
Next, the multiple display controller 19 performs an abnormal display by the semi-A / T ECU 13. The semi-A / T abnormality includes an abnormality that disables traveling, an abnormality that enables traveling, and an abnormality in air pressure drop. In the case of an abnormality in which traveling is not possible, “T / M control” is displayed on the display screen and the background color is “red”. “M air pressure” is displayed, the background color is “red”, and in the case of an abnormality in which travel is possible, “T / M control” is displayed on the display screen, and the background color is “orange”. . These three abnormality displays are sequentially displayed at intervals of 3 seconds. Thereafter, similarly, as shown in FIG. 4, the abnormality display and background color corresponding to other ECUs are sequentially displayed at intervals of 3 seconds.
[0024]
The operator sequentially compares the equipment specifications of the vehicle with the display items on the multiple display 4 and turns on the set / reset switch 8 of the multiple display changeover switch 5 if they match (correct). When the set / reset switch 8 is turned on, the multiple display controller 19 completes learning of all the connected ECUs 11 to 17. In this manner, the multiple display controller 19 is initialized, and the connected ECUs 11 to 17 are learned and stored. This prevents an increase in variations of the multiple display controller due to differences in vehicle specifications.
[0025]
If the equipment specifications of the vehicle and the display item do not match (is not correct), it is possible that the harness and connector are disconnected (disconnected), the in-vehicle ECU is defective, or the like. Therefore, the above-described initialization is performed again by checking the connection state of the harness and the connector again or replacing the defective ECU.
Next, disconnection detection by multiple display will be described.
[0026]
When the signal line between the ECUs 11 to 17 and the multiple display controller 19 is disconnected or the connector is disconnected, an alarm is not issued even if an abnormality actually occurs. Further, in the case of a single warning lamp, the conventional warning indicator outputs a signal from each ECU for a predetermined time when the key switch is turned on, and determines whether or not the lamp is actually lit and disconnected. However, since the multiple display 4 is employed in the present invention, it is very annoying if the lights are sequentially turned on to display the disconnection abnormality of all items.
[0027]
Therefore, the disconnection is determined by collating the signal content output in the learning mode with the learned content.
First, when the key switch 10 is turned on, it is used from the ECUs 11 to 17 in the learning mode for a predetermined time, for example, 2 seconds. Initial check signal Is output. The multiple display controller 19 Initial check signal And the learned contents are compared to compare the connection status with the ECUs 11 to 17. When they do not match, it is determined that the connection is broken and the item is displayed on the multiple display 4. This disconnection detection and disconnection item display is performed from when the key switch 10 is turned on until the voltage at the L terminal of the alternator rises, that is, from when the key switch 10 is turned on until the engine is started. The multiple display controller 19 determines that the engine has been started when the input voltage of the alternator L terminal rises. This prevents alarm leakage due to disconnection of the signal line or disconnection of the connector.
[0028]
Next, a case where a disconnection check signal and an abnormal signal are discriminated will be described.
For example, if the abnormal signal sent from the engine ECU 11 is displayed as it is, an alarm is issued at the time of the engine stall, and an abnormality has occurred in the engine, or is it simply a disconnection check signal (an initial check signal for the ECU)? Can not be determined.
[0029]
Therefore, with respect to ECUs that output a plurality of abnormality signals, such as the engine ECU 11 and the semi-A / T ECU 13, etc., if all abnormality signals are output at the same time, it is regarded as a disconnection check signal (initial check signal) and no alarm is issued. Like that.
Hereinafter, the disconnection check of the engine ECU 11 and the determination of the abnormality signal will be described with reference to the disconnection detection processing flowchart of the engine ECU 11 of FIG. This disconnection detection is based on the above-described learning based on two abnormalities of the engine ECU 11, that is, an abnormal engine that cannot travel (hereinafter referred to as “engine control 1”) and an abnormal engine that can travel (hereinafter referred to as “engine control 2”). It is assumed that it is learned in mode.
[0030]
The multiple display controller 19 starts the engine control 1 of the engine ECU 11 and the disconnection detection process of the engine control 2 at the same time as the key switch 10 is turned on, and determines whether or not the signal line of the engine control 1 of the ECU 11 is not connected. (Step S1). This determination is made based on whether an initialization check signal for the engine control 1 is detected for a predetermined time after the key switch 10 is turned on, for example, 0.5 second or more in 2 seconds. When the determination result of step S1 is negative (NO), that is, when the signal line of engine control 1 is connected, it is similarly determined whether or not the signal line of engine control 2 is not connected (step S2). ). When the determination result of step S2 is negative (NO), that is, when the signal line of the engine control 2 is connected, it is determined to be normal and the process routine is passed, and the determination result of step S2 is affirmative (YES). Sometimes, it is determined that the signal line of the engine control 2 is disconnected, and a warning display for the engine control 2 is performed (step S4). In this display, as described above, the background color of the multiple display 4 is orange, and the display screen is displayed as engine control.
[0031]
When the determination result of step S1 is affirmative (YES), that is, when the signal line of engine control 1 is disconnected, it is determined whether or not the signal line of engine control 2 is not connected (step S3). When the determination result of step S3 is negative (NO), that is, when the signal line of engine control 2 is connected, a warning display of engine control 1 is performed (step S5). In this display, the background color of the multiple display 4 is red and the display screen is displayed as engine control.
[0032]
If the determination result in step S3 is affirmative (YES), it is determined that both signal lines of the engine control 1 and 2 are disconnected, a warning display of the engine control 1 and engine control 2 is performed (step S6), The process ends. These displays are alternately displayed on the multiple display 4 with a background color of red and engine control, and with a background color of orange and engine control at intervals of 3 seconds.
[0033]
When there is a real abnormality in the engine, only one abnormality signal is output from the engine ECU 11, and when there is an actual abnormality in the engine, the multiple display controller 19 displays red and orange colors on the multiple display 4. Both of them are not lit, and the abnormality with the higher importance is displayed. Accordingly, when two signals of engine control 1 and engine control 2 are input from the engine ECU 11, the multiple display controller 19 determines that a signal at the time of key switch on, that is, an initial check signal has been output, and issues an alarm. Does not fire. This prevents false alarms such as when an engine stalls. The same applies to the semi-A / T ECU 13.
[0034]
Next, a description will be given of a case where the abnormality alarm of the alarm system is limited when the abnormality is minor. If an alarm is always generated when the alarm condition is met, and an alarm is generated even if it can be reset by turning the key switch off (for example, “Please go to the nearest service factory”), the occupant Not only will it cause unnecessary anxiety, but the credibility of the alarm will be lowered. In particular, an engine abnormality may lead to a stop on the road, and even if a serious abnormality occurs, a warning by a voice message is not issued in the first abnormality detection.
[0035]
In FIG. 3, the multiple display controller 19 stores whether or not the alarm condition is satisfied when the key switch 10 is turned off for a specific item, and the alarm condition is satisfied again when the key switch 10 is turned on next time. Only in the case where the mute signal is output, the output of the audio device 21 is narrowed down, and an audio signal corresponding to the content of the abnormality is output and an alarm by an audio message is issued from the speaker 22. As described above, the multiple display controller 19 issues a warning by a voice message only for an abnormality that cannot be reset by turning off the key switch 10. This improves the credibility of the alarm.
[0036]
Next, the proper use of the colors of the display screen background and display characters of the multiple display 4 will be described.
The multiple display 4 is composed of a large LCD (liquid crystal display unit), and can display three colors of red, orange, and green as background colors. Then, red indicates a state where it is impossible to continue traveling, orange indicates a caution, and green indicates a normal state.
[0037]
There are two types of caution display: warning due to failure (warning display) and caution indicating warning action (indicator display). Warning due to failure indicates a state that requires attention for driving, and attention indicating warning action indicates For example, it represents a state that requires confirmation of the operation of the device at the time of starting or running. However, the caution color of the multiple display 4 is orange, and since both the warning display (failure) and the indicator display (operation) are combined, it is difficult to visually recognize both of them.
[0038]
Therefore, these two types of attention are displayed by inverting the lighting portion and the non-lighting portion of the multiple display 4. For example, a caution due to a failure (warning display) indicates the background of the display 4 in orange (lighted portion), a character is displayed in black (non-lighted portion), and a caution (indicator display) indicating a caution operation is displayed on the multiplex display 4. The background is black (non-illuminated part) and the character is orange (illuminated part). This is because the multiple display 4 is easy to visually recognize the background color, that is, the one with the larger light emitting area, and accordingly, the case where the background color is orange is regarded as a failure.
[0039]
As a caution that the background color of the multiple display 4 is orange and the characters are black, for example, there is the one shown in FIG. FIG. 6A shows “engine control” lit when the electronic control system of the fuel injection system such as an electronic timer system or an electronic governor system in engine control has an abnormality and the function is deteriorated. The engine's electrical system is abnormal and its function is degraded. Check it as soon as possible. " Fig. 6 (b) shows that "Power steering control" is lit when a failure occurs in the electronic control system of the vehicle speed sensitive power steering, and a voice message says "There is an abnormality in the power steering electrical system and the function is degraded." Please check as soon as possible. " Fig. 6 (c) shows “T / M control” lit when a failure occurs in the automatic transmission electronic control system in transmission control. Alert me with a voice message.
[0040]
In addition, "Chassis Air Suspension Control" when a failure occurs in the electrical system of the chassis air suspension, "SRS Airbag" when a failure occurs in the electronic control system of the airbag, and a failure in the electronic control system of the ASR. There are a number of display items such as “ASR control” and the voice message when the error occurs.
As a caution that the background color of the multiple display 4 is black and the character is orange, for example, there is the one shown in FIG. FIG. 7 (a) is lit during “cold start”, and when driving with the cold start switch turned on, a warning message “Please return the cold start switch” is given. FIG. 7B shows, for example, “PTO” when taking out the driving force of the engine in a dump truck. When the vehicle speed becomes 20 km / h or more with the PTO switch turned on, for example, Please alert me with a voice message. In Fig. 7 (c), when the diff lock is applied to the rear two-shaft drive vehicle, "Differential lock" is lit up. When the vehicle speed becomes 20 km / h or more with the diff lock switch turned on, "Return the diff lock switch." ”Alerts with a voice message.
[0041]
In addition to this, “in preheating” that lights up when the intake air heater is energized at engine start, “coupler lock” that lights up when the trailer of the semi-tractor vehicle is securely connected, and the turntable of the trailer of the full tractor vehicle There are display items such as “Turntable Lock” that light up when fixed, and their voice messages.
In this way, by inverting and displaying the lit portion and the non-lit portion of the display screen of the multiple display 4, the meaning of the display mode is changed in the same color (orange), and the basic “caution” is given. The warning display (failure) and the indicator display (operation) are recognized. This makes it easier for the driver to recognize the caution items on the multiple display 4.
[0042]
The green display (normal display) of the multiple display 4 includes, for example, trip, battery voltage, hydraulic pressure, calendar, travel distance, travel speed, engine on time, drive time, loss time, engine oil, mission oil, differential oil. There are items such as cooling water and loading.
[0043]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the vehicle is mounted, the initial display signal is sent from each electronic control unit to the multiple display controller, and the specification of the vehicle is stored, so that the multiple display controller can be shared. Can prevent an increase in controller variations. Car Increases in variations of multiple display controllers due to differences in both specifications are prevented.
[0044]
Claim 2 and 3 Accordingly, it is possible to prevent alarm leakage due to disconnection of the signal line, disconnection of the connector, or the like.
Claim 4 According to the above, regarding all of the engine ECU and the semi-A / T ECU, when all the abnormality signals are output simultaneously, the alarm notification is not displayed, thereby preventing erroneous reports such as at the time of engine stall.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an instrument panel of a vehicle provided with a multiple display device according to the present invention.
FIG. 2 is a block diagram showing a schematic configuration of a multiple display device according to the present invention.
3 is a block diagram showing an example of an alarm system of the multiple display device of FIG. 2;
4 is an explanatory diagram showing a relationship between each electronic control unit, a display screen of a multiple display display, and a display color when initializing a multiple display controller in the multiple display device of FIG. 2; FIG.
5 is a flowchart showing an example of disconnection detection processing of the multiple display device of FIG. 2;
6 is a diagram showing an example of a warning item warning display by the multiple display of FIG. 2; FIG.
7 is a diagram illustrating an example of a warning item indicator displayed on the multiple display shown in FIG. 2; FIG.
[Explanation of symbols]
1 Instrument panel
2 Meter cluster
3 Warning indicator
4 Multiple display
5 Multiple display changeover switch
6 Mode switch
7 Select switch
8 Set / Reset switch
10 Key switch
11 Engine ECU
12 A / T ECU
13 Semi A / T ECU
14 ASR ECU
15 Power steering ECU
16 Air suspension ECU
17 Airbag ECU
19 Multiple display controller
20 Alarm system
21 Audio equipment
22 Speaker

Claims (4)

A vehicle having a plurality of electronic control devices mounted on a vehicle, and a multiple display controller to which the electronic control devices are connected and which display a display item corresponding to an output signal from the electronic control device on a display unit in a cab In multiple display devices,
Wherein causing the plurality of initial check signal from the electronic control unit respectively outputs the check signal request unit for external operation, and stores the connected electronic control device to said multi-display controller to the multi display controller, the external operation e Bei initialization means and a memory execution unit for,
The multiple display controller sequentially displays the connection status of each electronic control unit at predetermined intervals on the display unit in response to the initial check signal.
An automotive multiple display device , wherein the electronic control device is stored in the multiple display controller when the storage execution means is externally operated . Furthermore, a connection status determination means for determining a connection status between the multiple display controller and the plurality of electronic control devices,
When said multi-display controller and the plurality of electronic control device is determined to be in a disconnection state, according to claim 1, characterized in that for warning display to indicate an electronic control unit which is determined to break on the display unit Multiple display device for automobiles. The connection status determination means includes
A value stored in the multiple display controller is compared with initial check signals output from the plurality of electronic control devices by an external operation of the check signal requesting means , and when the two do not match, it is determined that there is a disconnection. The multiple display device for automobile according to claim 2 . At least one of the plurality of electronic control devices, the multi-display controller through each specific abnormality degree signal a plurality of signal lines capable of outputting representing the abnormality degree is connected to each of said plurality of signal lines Including an electronic control unit capable of outputting the abnormality degree signal representing a different abnormality degree,
The abnormality degree warning from each signal line is not displayed on the display unit when an abnormality degree signal from each signal line is simultaneously input from the electronic control unit to the multiple display controller. Item 4. The vehicle multiple display device according to Item 2 or 3 .

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