JPH1131087A - Electronic equipment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce development cost to realize a failure diagnostic function and to improve the accuracy of a failure diagnosis. SOLUTION: A center module ECU 108 and an air-conditioning mechanism part are provided with room temperature sensors 151 and 152, and the module 108 outputs a sensor value detected by the sensor 151 to an air-conditioner ECU 121. And the module ECU 108 and the air-conditioner ECU 121 execute the same operation by using the sensor value. The air-conditioner ECU 121 sends the operation result to the module ECU 108, and the module ECU 108 compares those operation results and decides that a failure occurs in the air- conditioner ECU 121 or the air-conditioning mechanism part when each operation result does not coincide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus, and is connected to a plurality of in-vehicle electrical components such as a car navigation device and a car audio via a connector, and operates the in-vehicle electrical components in a concentrated manner. Alternatively, the present invention relates to an electronic device that can be controlled.

[0002]

2. Description of the Related Art As a technique related to the above-mentioned apparatus, Japanese Patent Application Laid-Open No. Hei 6-132,836 discloses that a design part equipped with a key input circuit and a function selection circuit is configured as a separate body detachable from a receiving apparatus. When the setting of the receiving device needs to be changed in accordance with the change of the destination or the specification, there is disclosed a configuration in which only the design part is changed to be able to cope with any specification.

Japanese Patent Application Laid-Open No. 8-288877 discloses an audio equipment in which a main body containing a tuner circuit, a tape deck, and the like, and an operation panel on which operation keys and the like are mounted are provided separately. There is disclosed an apparatus in which a processing program related to the corresponding display specification is shared, the development period can be reduced even when the destination is changed, and all specifications can be supported by changing only the operation panel.

Japanese Patent Laid-Open Publication No. Hei 6-107082 discloses a car connector for attaching a car radio to a bracket on a vehicle body so that a mounting operation of an audio device and a wiring work can be performed simultaneously. There is disclosed an arrangement in which a radio-side connector is provided at a rear portion of a radio, and a wiring connector and a radio-side connector are connected when a car radio is mounted.

[0005]

However, in the above-mentioned prior art, if a failure diagnosis is to be performed for a plurality of electrical units, it is necessary to provide a failure diagnosis means for each of the plurality of electrical units provided with the CPU, which results in a low cost. Ascent is inevitable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object not only the control means on the main body side but also a plurality of control means connected to the main body side while suppressing an increase in cost relatively. Can determine the failure, and can perform the failure determination of the entire system in a common way by one method. Therefore, the failure diagnosis function can be realized by using the original control means, the development cost can be reduced, and the accuracy of the failure diagnosis can be reduced. It is an object of the present invention to provide an electronic device capable of improving the performance.

[0007]

In order to solve the above-mentioned problems and achieve the object, an electronic apparatus of the present invention has the following arrangement. That is, a plurality of electrical units and a first unit provided in each of the electrical units and controlling each of the electrical units.
Control means, provided independently of the electrical unit,
Centralized operation means having a display unit for each of the electrical units; second control means for controlling display of the display unit based on a display control signal output from the first control means;
A failure determination unit provided in the second control unit and configured to determine whether each of the first control units has failed.

[0008] In order to solve the above problems and achieve the object, an electronic apparatus of the present invention has the following configuration. That is, a plurality of electrical units, first control means provided in each of the electrical units, and controlling each electrical unit, and an operating unit for each electrical unit provided independently of the electrical unit Centralized operation means, second control means for inputting an operation signal of the operation section and outputting a control signal corresponding to the operation signal to the first control means;
A failure determination unit provided in the second control unit and configured to determine whether each of the first control units has failed.

In order to solve the above problems and achieve the object, an electronic apparatus of the present invention has the following configuration. That is, a plurality of electrical units, first control means provided in each of the electrical units and controlling each electrical unit, and an operating unit and display for each electrical unit provided independently of the electrical unit A centralized operation unit having a unit, an input process of an operation signal of the operation unit, a control signal corresponding to the operation signal to the first control unit, and a display control output from the first control unit A second control unit that controls the display of the display unit based on the signal; and a failure determination unit that is provided in the second control unit and determines whether each of the first control units has failed.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

The electronic apparatus (hereinafter, referred to as a center module) of the present embodiment includes an operation panel unit and a control unit, is connected to a navigation device, audio equipment, or the like, and is connected to these devices via a display unit or a switch operation unit. Can be integrated and controlled.

This center module eliminates the operation switches and the like normally provided in an audio device, a car navigation device, and the like, and is instead connected to on-vehicle electrical components to enable centralized operation.

[0013] In this way, the vehicle-mounted electric components conventionally mounted individually can be integrally formed, and center modules having different functions and designs are prepared according to the type of vehicle, and the choice of the purchaser can be improved. It is possible to consider the decorativeness of the interior of the vehicle.

[External Configuration of Center Module] FIG.
It is an outline view of a center module of an embodiment concerning the present invention. 2 and 3 are cross-sectional views taken along the line AA of FIG.
FIG. 2 is a sectional view when the center module shown in FIG. 1 is mounted in a vehicle interior.

As shown in FIG. 1, the center module 10
Numeral 0 is located near the center of the dashboard 1 between the driver's seat and the passenger seat, and is located above the center console where the audio and the like are conventionally installed.

The center module 100 includes an operation panel unit 50 and a control unit 60. The operation panel unit 50 includes a panel body formed in an inverted triangular shape,
An air outlet 101 of a car air conditioner, a display 102 including an LCD panel, various switch operation units 103,
Function switch group 104, hazard switch 1
05, a CD tray cover 106 is provided.

The display 102 is a monochrome or color dot matrix display or a segment display. Function switch group 104
The hazard switch 105 is arranged above the display 102. The hazard switch 105 is disposed substantially at the center of the function switch group 104. The function keys 104 are mainly used as switching buttons for audio mode display, clock display, FM multiplex display, and DIS display.

The CD tray cover 106 is provided below the display 102. The CD tray cover 106 is provided at a position corresponding to a CD mechanism mounted on the navigation ECU, which will be described later, and is opened / closed in response to an opening / closing operation of a CD tray on the CD mechanism side. The various switch operation units 103 are provided below the CD tray cover 106. The switch operation unit 103 includes a tuning button and a volume adjustment button for a radio of an audio device, a temperature adjustment button and an air volume adjustment button for an air conditioner, an operation button for a navigation device, and the like.

[Center Module Mounting Configuration] As shown in FIG. 2 and FIG.
Center module ECU 108 and car navigation E
The CU 109 is housed in the fixed case 6. The operation panel unit 50 and each ECU are connected to each other by the connector 11.
0 and 111 are mechanically and electrically connected integrally. A fixing pin 107 is provided on the back of the center module ECU 108 via the fixing case 6.
The module-side connector 5 is provided below the center module ECU 108 via a fixed case 6.

The module side connector 5 is connected to the needle adjustment connector 4 in which a wire harness and a multiplex communication LAN harness are integrated. The needle adjustment connector 4 is provided on a connector support 10 extending downward from the guide 9. The needle adjustment connector 4 is supported by the connector support 10 so as to be movable by a predetermined width in the vertical direction. Fixing pin 107
Are fixed to the mounting stay 2 extending from the guide 9 with bolts / nuts or the like. The guide 9 is fixed to the reinforcing member 3 and guides the mounting position when the center module 100 is arranged on the dashboard 1. The reinforcing member 3
It is provided to support the dashboard 1 and extends in the vehicle width direction.

Operation panel unit 50 and control unit 6
0 is integrally assembled by the fixed case 6.

As shown in FIGS. 2 and 3, when this center module 100 is mounted on a dashboard, an assembly (center module 100) including an operation panel unit 50 and a control unit 60 is attached to a predetermined opening of the dashboard. The guide connector 9 guides the module-side connector 5 and the needle adjustment connector 4 to fit together, and the fixing pin 107 is inserted into a fitting hole formed in the mounting stay 2. In this state, the fixing pin 107 is fixed to the mounting stay 2 with bolts / nuts or the like, and the operation panel unit 5
The upper and lower ends of 0 are the flanges 1a of the dashboard 1.
The center module assembly is fixed at a predetermined position on the dashboard 1 by fixing the center module assembly to the dashboard 1.

The direction of engagement of the assembly with the fixing pin 107 is substantially the same as the direction in which the module-side connector 5 is connected to the needle adjustment connector 4.

If the operation panel unit 50 is fixed to the flange 1a of the dashboard 1 with screws 8 and the cover member 11 is provided on the outer edge of the operation panel unit 50, the screws 8 cannot be seen from the outside, so that the appearance is improved. Will be better. Instead of using the cover member 11, the air conditioner outlet 101 may be made detachable, a screw stop position may be provided in the air conditioner outlet, and the air conditioner outlet 101 may be covered after the center module is attached.

When an optional tape deck, MD deck, or the like is mounted, a rack 7 provided at the lower center of the dashboard is used. For example, tape deck 200
When the option is installed, the tape deck 200 is fixed to the rack 7, and the connector 114 provided on the rear surface of the rack 7 is connected to the wire harness 12. A wire harness 12 extending from the needle adjustment connector 4 to the vehicle body is provided with a harness for connecting to a tape deck, an MD deck, or the like.

As will be described later, a tape deck, M
The D deck, the DVD deck, and the like are configured by a tape mechanism unit 200 and an MD mechanism unit 201 including only a driving mechanism and a loading / unloading mechanism for a cassette tape, an MD, a DVD, or the like, and read audio signals from the cassette tape, the MD, or the DVD. It just outputs to a separate controller. The controller is built in the navigation ECU. [Control Circuit Configuration] FIG. 4 is a block diagram showing a control circuit configuration of the center module. FIG. 5 is a block diagram showing a detailed control circuit configuration of the center module ECU.

As shown in FIG. 4, the center module EC
U108 has a built-in DIS (DRIVE INFORMATION SYSTEM) ECU, a sub CPU 131, a failure diagnosis circuit 13
2 is provided. DIS is a system that calculates the average fuel efficiency, running time, and the like of the vehicle and notifies the occupant of the calculated value.

The navigation ECU 109 includes a GPS antenna 112, a drawing processing circuit 141, and a CD mechanism unit 14.
2, an amplifier 143, a tape mechanism 200, an MD
The controller of the mechanism section 201 and the CD mechanism section 142 is incorporated. The center module ECU 108 and the navigation ECU 109 are electrically connected via the operation panel unit 50. Navigation ECU 109
Controls the CD mechanism 142.

The center module ECU 108 connects the FM / AM antenna 113 and the external speaker 12
9. Air conditioner ECU 121, ICC ECU 123, PA
It is connected to the SECU 125, the warning lamp 127, and the DIS sensor 128. The DIS sensor 128 detects wheel speed, fuel consumption, wheel air pressure, and the like.

The ICC ECU 123 is a controller for controlling the intelligent cruise control (ICC) mechanism 124, and the PASECU 125 is a controller for controlling the parking assist system (PAS) mechanism 126.

Further, the center module ECU 108
The tape mechanism 200 via the connector 114 electrically connected to the needle adjustment connector 4 via the wire harness, the MD mechanism 201 via the connector 115, and the connector 11
6 is connected to the DVD mechanism unit 202. Tape mechanism section 200, MD mechanism section 201, DVD mechanism section 20
2 performs only the loading / unloading of cassette tapes, MDs or DVDs, driving, and reading of audio signals, and actual control of these is executed based on the navigation ECU 109. That is, the navigation ECU 109
Is the switch operation unit 1 on the switch operation panel 50.
In response to the switch operation of the switch 03, the tape mechanism unit 200, the MD mechanism unit 201, and the DVD drive unit 202, which are optionally added later, are collectively controlled, an audio signal is amplified by the amplifier 143, and the audio is transmitted through the center module ECU 108. The signal is output to the external speaker 129.

An air conditioner mechanism section 122 is connected to the air conditioner ECU 121, an ICC mechanism section 124 is connected to the ICC ECU 123, and a PAS mechanism section 126 is connected to the PASEC ECU 125.
Are connected respectively. The air conditioner mechanism 122 drives a blower fan, a refrigerant pump, and the like.

A switch operation signal from the switch operation unit 103 is output to the center module ECU 108 and the navigation ECU 109. Center module ECU
108, a drawing processing circuit 14 which receives a switch operation signal
1 to output an image signal. The drawing processing circuit 141 forms a drawing signal to be displayed on the display unit 102 based on the image signal and controls the display of the display unit 102, while the FM character multiplexing output from the center module ECU 108 via the FM / AM antenna 113. Display unit 102 based on the signal
, A display signal is formed, and the display of the display unit 102 is controlled. In response to the switch operation signal, the navigation ECU 109 controls the CD mechanism 142, the tape mechanism 200,
A drive control signal is output to the MD mechanism unit 201 and the DVD mechanism unit 202, and the CD mechanism unit 142 and the tape mechanism unit 2 are output.
00, the audio signals output from the MD mechanism unit 201 and the DVD mechanism unit 202 are transmitted to the amplifier 143 and the center module E.
Output to the external speaker 129 via the CU 108.

Thus, the navigation ECU 109
In addition, by incorporating control functions for setting options such as the CD mechanism section 142, the tape mechanism section 200, the MD mechanism section 201, and the DVD mechanism section 202, the entire control unit can be reduced in size.

As shown in FIG. 5, the center module E
The CU 108 includes an input interface circuit 134, a main CPU 133, a sub CPU 131, and an input / output port circuit 134. The main CPU 133 and the sub CPU 131 have a ROM, a RAM, and a timer function.

An operation signal from the switch operation unit 103 is sent to the main CPU 13 via an input interface circuit 134.
3 is input to the sub CPU 131. Main CPU 13
3 and the sub CPU 131 can communicate with each other. The main CPU 133 outputs a control signal to the output driver 135, the communication circuit 136, or the drawing processing circuit 141 via the input / output port 134. Sub CPU 131
Executes a failure diagnosis process on the main CPU 133, and substitutes for the main CPU 133 when the main CPU 133 is diagnosed with a failure.

The output driver 135 turns on, blinks or turns off the indicator 127 according to the operation signal. The drawing processing circuit 141 generates a drawing signal according to the operation signal, and outputs the signal to the display unit 102. The drawing signal is also input to the main CPU 133 and the sub CPU 131 via the input / output interface circuit 134, and is used for failure diagnosis described later.

The center module ECU 108 communicates with the air conditioner ECU 121, the ICC ECU 123, and the PASECU 1 via the communication circuit 136 and the plug-in connectors 4 and 5.
25 is communicably connected. The needle adjustment connector 5
Air conditioner ECU 12 via multiplex communication LAN harness
1, connected to the ICC ECU 123 and the PASECU 125.

The air conditioner ECU 121 has a communication circuit 121
a, a CPU 121b, and an output driver 121c.
Communication data output from the center module ECU 108 is output to the CPU 121b via the communication circuit 121a. The CPU 121b outputs a control signal corresponding to the communication data to the air conditioner mechanism 122 via the output driver 121c.

The ICC ECU 123 includes a communication circuit 123a,
It has a CPU 123b and an output driver 123c. Communication data output from the center module ECU 108 is output to the CPU 123b via the communication circuit 123a. The CPU 123b outputs a control signal corresponding to the communication data to the ICC mechanism section 124 via the output driver 123c.

The PASECU 125 includes a communication circuit 125a,
It has a CPU 125b and an output driver 125c. Communication data output from the center module ECU 108 is output to the CPU 125b via the communication circuit 125a. The CPU 125b outputs a control signal corresponding to the communication data to the PAS mechanism 126 via the output driver 125c.

The switch operation unit 103 includes an operation switch for a navigation device, an operation switch for a CD (compact disc), an operation switch for an MD (mini disc),
DVD (digital video disc) operation switch, cassette deck operation switch, radio operation switch,
An operation switch of a DIS device, an operation switch of FM character multiplexing, an operation switch of an air conditioner, and the like are provided.

The center module ECU 108 includes an ignition switch 118 and a power switch 11.
7 is connected.

The center module ECU 108 controls the tape mechanism 20 output from the navigation ECU 109.
0, a switch operation signal for controlling the MD mechanism unit 201 and the DVD mechanism unit 202 is transmitted to the tape mechanism unit 200 and the MD mechanism unit 2.
01, output to the DVD mechanism unit 202.

The tape mechanism 200, the MD mechanism 201,
The DVD mechanism unit 202 includes the center module ECU 108
Each mechanism is driven in response to a switch operation signal from the controller.
The navigation ECU 109 includes a tape mechanism unit 200, an MD mechanism unit 201, and a DVD mechanism unit 20 according to an operation signal.
An image signal for displaying the operation state of No. 2 on the display unit 102 is output to the drawing processing circuit 141.

The drawing processing circuit 141 forms a drawing signal to be displayed on the display unit 102 based on the image signal and controls the display of the display unit 102, while the center module ECU 1
Based on the FM character multiplexed signal output from 08, a drawing signal to be displayed on the display unit 102 is formed to control the display of the display unit 102.

The main CPU 133 or the sub CPU 13
1 is an input / output port unit 1 for the output driver 135.
An indicator drive signal is output via 34.

The main CPU 133 or the sub CP
U131 sends an RS-232C signal to the communication circuit 136.
Serial input / serial output (SI / SO) port 134
air conditioner ECU 121, ICC ECU 12
3. Output a control signal to the PASECU 125. Communication circuit 136, air conditioner ECU 121, ICC ECU 12
3. The PASECU 125 is, for example, a CSMA (Carrier S
Communication is possible by a network access method called ensemble multiple access (CD) / collision detection (CD).

As described above, the navigation ECU 10
9 optional tape mechanism 200, M
By mounting the controllers of the D mechanism unit 201 and the DVD mechanism unit 202, it is possible to increase or decrease the types of devices to be retrofitted or to add or remove the functions without changing the functions of the center module itself.

[Signal Input / Output between Center Module and Other ECUs] Next, the center module ECU and other ECs
An input / output mode of a signal with U will be described.

The center module ECU 108 converts the switch operation signal input via the input interface circuit 134 into the air conditioner ECU 121 and the ICCC ECU 12.
3, PASECU 125, navigation ECU 109
And output it. And each ECU
Controls each mechanism in response to a switch operation signal, and outputs an image signal to the drawing processing circuit 141.
This image signal indicates that the mechanism has been controlled in response to the switch operation signal, and functions as a response signal to the switch operation signal.

When the center module ECU 108 does not return an image signal representing control in accordance with the switch operation signal or returns a response signal that does not match the switch operation signal, the ECU or mechanism at the output destination fails. It is determined that there is.

[Fault Diagnosis of Center Module] Next, fault diagnosis of the center module will be described.

FIG. 6 is a flowchart showing the failure diagnosis processing of the center module. FIG. 7 is a flowchart showing the failure determination process shown in FIG.

As shown in FIG. 6, in step S2, a failure diagnosis process is executed. This failure diagnosis processing is performed in sub C
The PU 131 monitors the state of the center module ECU 108. In step S4, the sub CPU 131 determines whether the failure diagnosis result in step S2 is a serious failure. If it is determined in step S4 that a serious failure has occurred (Yes in step S4), the process proceeds to step S6 and the main C
The function of the PU 133 is stopped. If it is not a serious failure in step S4 (No in step S4), the process proceeds to step S16 to determine whether or not the failure diagnosis result in step S2 is a minor failure.

In step S8, the processing in the sub CPU 131 is started. In step S10, the sub CPU 13
1 is an indicator 127 via the output driver 135
Is turned on or blinks to notify the occupant of the failure of the main CPU 133. In step S12, the indicator 127 is turned on or blinks until the stop switch is operated by the occupant. When the stop switch is operated in step S12, the process proceeds to step S14, where the indicator 127 is operated.
Is stopped, and the process returns to step S2.

If it is determined in step S16 that the failure is minor (Yes in step S16), the above-described step S10 is performed.
Proceed to. On the other hand, if it is not a minor failure in step S4 (No in step S16), the process proceeds to step S18, and it is determined whether the function of the main CPU 133 is stopped. If the function of the main CPU 133 is stopped in step S18 (Yes in step S18), the process proceeds to step S20 to release the function stop. It is determined whether the failure diagnosis result is a minor failure. In step S18, the main CPU
133 is not suspended (N in step S18)
o), and return to step S2.

In the above processing, the main CPU 133
When the sub CPU 131 and the sub CPU 131 have the same performance, the sub CPU 131 can perform all the processing of the main CPU 133. When the sub CPU 131 has about half the performance of the main CPU 133, a part of the processing of the main CPU 133 can be performed by the sub CPU 131.

As part of this processing, the air conditioner ECU
121, amplifier 143, hazard lamp, indicator, DIS, ICC, etc., the air conditioning operation, volume operation, hazard lamp ON / OFF operation,
An ON / OFF operation of the indicator, a DIS operation, and an ICC operation can be performed.

According to the above processing, the center module EC
Even when the main CPU 133 of U108 fails, the inoperable state can be avoided by backing up the data by the sub CPU 131.

<Failure Diagnosis Processing> As shown in FIG. 7, in step S22, the sub CPU 131
33 clock frequencies are detected. In step S24, the sub CPU 131 determines whether the clock frequency of the main CPU 133 detected in step S22 is abnormal. If the clock frequency is determined to be abnormal in step S24 (Yes in step S24), step S44
The main CPU 133 determines that a serious failure has occurred. On the other hand, if the clock frequency is determined to be normal in step S24 (No in step S24), step S2
Proceeding to 6, the switch operation signals input to the main CPU 133 and the sub CPU 131 are detected. Step S2
In step 8, switch operation signals of the main CPU 133 and the sub CPU 131 are compared. In step S28, the same switch operation signal is input to the main CPU 133 and the sub CPU 131, and if the input results are different from each other, it is determined that the input interface circuit 134 has failed. Further, since a switch operation signal is also input to the sub CPU 131 through a different system, a failure site can be specified.

If the respective switch operation signals of the main CPU 133 and the sub CPU 131 match in step S28 (Yes in step S28), the flow advances to step S30 to compare the same calculation results of the main CPU 133 and sub CPU 131. In step S30, the main CP
The same operation is performed by U133 and the sub CPU 131, and when the input results are different from each other, it is determined that the main CPU 133 is out of order. Here, unless the sub CPU 131 is normal, the main CPU 133 and the sub CPU 131 individually execute the same calculation.
If the calculation results do not match, it cannot be determined which is the failure. Therefore, if the calculation results do not match, the air conditioner ECU
The main CPU 133 is monitored by the ICC ECU 123, the PASECU 125, and the sub CPU 131, and a majority decision process is performed to specify which CPU has failed.

This majority processing is executed by the sub CPU 133. For example, as shown in FIG.
If all the calculation results of “1” are the same “1”,
Is determined not to have failed. Also, the main CPU 1
If the calculation results of 33 are different or a minority, the main CPU 133 is determined to be faulty (in FIG. 8, the calculation result of the main CPU is “2”, and the other calculation results are “1”).
And the main CPU is a minority). In addition, air conditioner CP
If the calculation result of U1121b is different or is a minority, it is determined that the air conditioner CPU 121b is out of order (in FIG. 8, the calculation result of the air conditioner CPU is “2”, the other calculation result is “1”, and the air conditioner CPU is minority). Further, if the calculation results of the ICCCPU 123b are different or the number is a minority, the ICCCPU 123b is determined to be faulty (in FIG. 8, the calculation result of the ICCCPU is “2”, the other calculation result is “1”, and the number of ICCCPUs is small). Faction). Further, if the calculation results of the PASCPU 125b are different or the number is a minority, it is determined that the PASCPU 125b is out of order (in FIG. 8, the calculation result of the PASCPU is "2", the other calculation result is "1", and the PASCP is 125).
U is a minority). Further, if the calculation result of the sub CPU 131 is different or is a minority, it is determined that the sub CPU 131 has failed (in FIG. 8, the calculation result of the sub CPU is “2”, the other calculation result is “1”, Sub CPU
But a minority).

If the calculation results of the main CPU 133 and the sub CPU 131 match each other in step S32 (Yes in step S32), the process proceeds to step S34, where the sub CPU 1
Reference numeral 31 detects an answer back output from the main CPU 133.

In step S34, the center module E
The CU 108 includes an air conditioner ECU 121, an ICC ECU 1
23, a control signal is transmitted as communication data to the PASECU 125, and a control result signal is received from the ECU 121, 123, 125. After that, the center module EC
U108 returns an answerback signal to each of ECUs 121, 123, and 125. The sub CPU 131 determines that the main CPU 133 has failed when the answer back signal is not normally output from the main CPU 133.

In step S36, the main CPU 133
Then, it is determined whether answerback is normally performed. When it is determined that the answer back is abnormal in step S36 (No in step S36), step S38 is performed.
The sub CPU 131 determines whether or not the image signal output from the main CPU 133 is normal. Step S
If the image signal output from the main CPU 133 is normal at 40 (No at Step S40), the process returns to Step S22. If the image signal output from the main CPU 133 is abnormal (Yes at Step S40), the process proceeds to Step S46. , The main CPU 133 determines that the fault is minor.

If the switch operation signals of the main CPU 133 and the sub CPU 131 do not match in step S28 (No in step S28), the flow advances to step S42 to determine whether the operated switch is an important switch. In the case of an important switch in Step S42 (Step S
(Yes at 42), the process proceeds to step S44 and the main CPU
133 is determined to be a serious failure. On the other hand, step S
42 is not an important switch (N in step S42
o), the process proceeds to step S46, where the main CPU 133 determines that the fault is minor. [Failure Diagnosis Method Between Center Module ECU and Other ECU] Next, a failure diagnosis method between the center module ECU and another ECU will be described.

<First Embodiment> FIG. 9 is a block diagram for explaining a failure diagnosis method according to the first embodiment. FIG.
5 is a flowchart illustrating a failure diagnosis method according to the first embodiment.

As shown in FIG. 9, in the first embodiment,
For example, when the room temperature sensors 151 and 152 are provided in the center module ECU 108 and the air conditioner mechanism unit 122 and the set temperature is changed by the temperature setting switch in the switch operation unit 103, the set temperature as a control result signal returned from the air conditioner ECU 121 and The temperature of the air conditioner ECU 121 or the air conditioner mechanism unit 12 is compared with the sensor temperature detected by the room temperature sensor 151 of the center module ECU 108.
2 is determined to have failed, and the indicator 127 is turned on or blinks.

More specifically, as shown in FIG. 10, in step S30, the temperature setting switch is operated, and the set temperature is input to the center module ECU 108 as a switch operation signal. In step S31, the center module ECU 108 determines whether the room temperature has changed based on the sensor signal from the sensor 1512. Step S3
When the room temperature changes in 1 (Yes in step S31),
Proceeding to step S32, if the room temperature does not change in step S31 (No in step S31), proceed to step S33. In step S31, the room temperature does not change (step S3
If the predetermined time has elapsed (Yes in step S33), it is determined that a failure has occurred in the air conditioner ECU 121 or the air conditioner mechanism 122.

In step S32, it is determined whether or not the room temperature detected by the room temperature sensor 151 has reached the set temperature. If the room temperature has reached the set temperature in step S32 (Yes in step S32), the process returns to step S30. On the other hand, if the room temperature does not reach the set temperature in step S32 (No in step S32) and a predetermined time has elapsed (Yes in step S34), it is determined that a failure has occurred in the air conditioner ECU 121 or the air conditioner mechanism 122.

<Second Embodiment> FIG. 11 is a block diagram illustrating a failure diagnosis method according to a second embodiment. FIG.
9 is a flowchart illustrating a failure diagnosis method according to the second embodiment.

As shown in FIG. 11, in the second embodiment, for example, room temperature sensors 151 and 152 are provided in the center module ECU 108 and the air conditioner mechanism 122, and the center module ECU 108 detects the sensor values detected by the room temperature sensor 151. Output to the air conditioner ECU 121.
Then, the center module ECU 108 and the air conditioner EC
In U121, the same calculation is executed using the sensor value. The air conditioner ECU 121 transmits the calculation result to the center module ECU 108, and
U108 compares the calculation results, and if the calculation results do not match, determines that a failure has occurred in air conditioner ECU 121 or air conditioner mechanism 122, and turns on or blinks indicator 127.

More specifically, as shown in FIG. 12, in step S40, the center module ECU 108 inputs a sensor value from the room temperature sensor 151. Step S41
Then, the center module ECU 108 sets the sensor value to A
The converted value after the / D (analog / digital) conversion is transmitted. In step S42, the air conditioner ECU 121 transmits the calculated value to the center module ECU 108. When the respective calculation results match in step S43 (Yes in step S43), the process returns to step S40. Further, if the respective calculation results do not match in step S43 (No in step S43), it is determined that a failure has occurred in the air conditioner ECU 121 or the air conditioner mechanism 122.

Here, unless the center module ECU 108 is normal, the center module ECU 108 and the air conditioner ECU 121 individually execute the same calculation. Therefore, if the calculation results do not match, it cannot be determined which is the fault. Therefore, when the calculation results do not match, the ICCECU 123, the PASECU 125, and the center module ECU 108 may specify which ECU is out of order by the majority process described above.

<Third Embodiment> FIG. 13 is a block diagram illustrating a failure diagnosis method according to a third embodiment. FIG.
9 is a flowchart illustrating a failure diagnosis method according to the third embodiment.

As shown in FIG. 13, in the third embodiment, for example, a room temperature sensor 151 commonly connected to the center module ECU 108 and the air conditioner mechanism 122 is provided, and the center module ECU 108 and the air conditioner ECU are provided.
121 inputs the sensor value detected by the room temperature sensor 151. Then, the center module ECU 108 and the air conditioner ECU 121 execute the same calculation using the sensor values. The air conditioner ECU 121 transmits the calculation result to the center module ECU 108, and the center module ECU 108 compares the calculation results, and determines that a failure has occurred in the air conditioner ECU 121 or the air conditioner mechanism 122 when the calculation results do not match. Then, the indicator 127 is turned on or blinks.

More specifically, as shown in FIG. 14, in step S50, the center module ECU 108 and the air conditioner ECU 121 input sensor values from the room temperature sensor 151. In step S51, the air conditioner ECU 121
Transmits the calculated value to the center module ECU 108. If the respective calculation results match in step S52 (Yes in step S52), the process returns to step S50. If the calculation results do not match in step S52 (No in step S52), the air conditioner ECU 121
Alternatively, it is determined that a failure has occurred in the air conditioner mechanism 122.

Here, unless the center module ECU 108 is normal, the center module ECU 108 and the air conditioner ECU 121 individually execute the same calculation. Therefore, if the calculation results do not match, it cannot be determined which is the fault. Therefore, when the calculation results do not match, the ICCECU 123, the PASECU 125, and the center module ECU 108 may specify which ECU is out of order by the majority process described above.

In the third embodiment, the air conditioner ECU
If the temperature does not change to the set temperature even though the calculation result of 121 is correct, it can be determined that the air conditioner mechanism 122 is faulty, and if the temperature is too high or does not drop, it is determined that the compressor or the like is faulty. it can.

<Other Embodiments> In the first to third embodiments, if a volume microphone or the like is provided instead of the room temperature sensor 151, a failure of the navigation ECU 109 can be determined.

In the first to third embodiments, the failure diagnosis of the other ECUs is performed by the center module ECU 108.
Main CPU 133 and sub CP inside CU 108
It is also applicable to failure diagnosis with U131. In this case, the same operation formula and operation result are transferred between the main CPU 133 and the sub CPU 131.

In the second and third embodiments, the center module 108 may read the same arithmetic expression from the RAM and transfer it to each ECU, or store a plurality of arithmetic expressions in the ROM. Alternatively, the information may be read from the ROM and transferred to each ECU. When using RAM,
There is an advantage that various arithmetic expressions can be generated at random.

In this case, as shown in FIG. 18, in step S60, an arithmetic expression is transmitted to each ECU. Step S6
In step 1, each ECU executes a calculation process. Step S
At 62, the center module ECU 108 determines that the other EC
When the calculation result is received from U (Yes in step S62)
s), the process proceeds to step S63 to compare the respective calculation results, and when no calculation result is received from another ECU (step S6)
2), an untransmitted ECU is determined to have failed in step S64.

If the results of the calculations match in step S63, the process returns to step S60. If they do not match, the process proceeds to step S65, where the above-described majority processing or sub-CP
An ECU having a calculation result different from U is determined to be faulty.
In step S66, the failure content is displayed on the display unit.

Further, important arithmetic expressions such as wheel speed and fuel consumption may be used.

As shown in FIG. 19, when the center module ECU 108 and the air conditioner ECU 121 perform the same calculation processing,
Sensor value via interface circuit, A / D conversion value,
The control output value and the like may be compared each time.

According to the above processing, the center module EC
Not only U, but also the air conditioner ECU and other ECUs connected to the center module ECU can be diagnosed as faults, and the fault diagnosis of the whole system can be shared and executed in one method. The functions can be realized, the development cost can be reduced, and the accuracy of failure diagnosis can be improved. [Failure of Display Unit] FIG. 15 is a block diagram for explaining a display method when the display unit has failed. FIG.
It is a figure explaining a display method when a display part fails. FIG. 17 is a diagram illustrating a display example of the sub display unit in FIG.

As shown in FIG. 15, in this embodiment,
For example, the main display unit 102 is displayed on the switch operation panel 50.
In addition, a sub display unit 153 is provided to
U108 is connected to each display unit 10 via the drawing processing circuit 141.
2, 153 can be displayed.

For example, since the operator can visually judge that the main display unit 102 has failed, by simultaneously operating any two of the switches A to C, the sub display unit 1 can be operated.
The display is switched to 53 to display the failure content. If the main display unit 102 breaks down during traveling, the display is switched to the sub-display unit 153, and the details of the serious failure are displayed.

Further, as shown in FIG.
53 may display data of a system with high importance such as an ICC device. In the illustrated example, the sub display unit 153 notifies that the data of the ICC device is being displayed, and the sub display unit 153 displays data of the inter-vehicle distance of 100 meters.

[0092] The sub display unit 153 is shown in FIG.
As shown in (c), a segment display type or dot display type liquid crystal which can display numbers, characters, characters, and the like is used.

The present invention can be applied to a modification or modification of the above embodiment without departing from the gist of the invention.

For example, the navigation ECU may include a television tuner controller in addition to a navigation device, a DIS device, or an audio device such as a cassette player or a radio which is provided as standard equipment in a vehicle.

Further, the center module of this embodiment is
It goes without saying that the present invention can be applied to devices other than the electric devices mounted on the vehicle.

[0096]

As described in detail above, according to the present invention,
By providing the second control means with a failure determination means for determining whether or not each first control means has failed, the increase in cost is relatively suppressed. It is also possible to determine the failure of a plurality of control means connected to the side, and to perform the failure determination of the entire system in a single method, so that the failure diagnosis function can be realized using the original control means. The cost can be reduced and the accuracy of failure diagnosis can be improved.

The second control means transmits a control signal to the plurality of first control means or inputs a display control signal from the plurality of first control signals. Since the portion of the communication line for the display control signal can be shared, an increase in cost can be suppressed.

[0098]

[Brief description of the drawings]

FIG. 1 is an external view of a center module according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and is a cross-sectional view when the center module shown in FIG. 1 is mounted in a vehicle cabin.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, and is a cross-sectional view when the center module shown in FIG. 1 is mounted in a vehicle cabin.

FIG. 4 is a block diagram showing a control circuit configuration of a center module.

FIG. 5 is a block diagram showing a detailed control circuit configuration of a center module ECU.

FIG. 6 is a flowchart illustrating a failure diagnosis process of the center module.

FIG. 7 is a flowchart showing a failure determination process shown in FIG.

FIG. 8 is a diagram illustrating a majority decision process based on a calculation result.

FIG. 9 is a block diagram illustrating a failure diagnosis method according to the first embodiment.

FIG. 10 is a flowchart illustrating a failure diagnosis method according to the first embodiment.

FIG. 11 is a block diagram illustrating a failure diagnosis method according to the second embodiment.

FIG. 12 is a flowchart illustrating a failure diagnosis method according to the second embodiment.

FIG. 13 is a block diagram illustrating a failure diagnosis method according to a third embodiment.

FIG. 14 is a flowchart illustrating a failure diagnosis method according to the third embodiment.

FIG. 15 is a block diagram illustrating a display method when a display unit has failed.

FIG. 16 is a diagram illustrating a display method when a display unit has failed.

FIG. 17 is a diagram illustrating a display example of a sub display unit in FIG. 16;

FIG. 18 is a flowchart illustrating a failure diagnosis process according to another embodiment.

FIG. 19 is a flowchart illustrating a failure diagnosis process according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Dashboard 4 ... Adjustment connector 5 ... Module side connector 6 ... Fixed case 50 ... Operation panel unit 60 ... Control unit 102 ... Display part 103 ... Switch operation part 108 ... Center module ECU 109 ... Navigation ECU 121 ... Air conditioning ECU 123 ... ICC ECU 125 ... PASECU 200 ... Tape mechanism (tape deck) 201 ... MD mechanism (MD deck) 202 ... DVD mechanism (DVD deck)

Continued on the front page (72) Kunihiko Matsumura, Inventor 3-1, Fuchi-cho, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd.

Claims (12)

[Claims] A plurality of electrical units; a first control means provided in each of the electrical units for controlling the electrical units; and a display for each electrical unit provided independently of the electrical units. A centralized operation unit having a unit; a second control unit for controlling display of the display unit based on a display control signal output from the first control unit; a second control unit provided in the second control unit; An electronic apparatus comprising: a failure determination unit that determines whether a unit has failed. 2. A plurality of electrical units, a first control means provided in each of the electrical units and controlling each electrical unit, and an independent unit provided independently of the electrical units to operate the respective electrical units A centralized operation unit having a unit, a second control unit that processes an operation signal of the operation unit and outputs a control signal corresponding to the operation signal to the first control unit, and a second control unit. And a failure determining means for determining whether each of the first control means has failed. 3. A plurality of electrical units, first control means provided in each of the electrical units and controlling each electrical unit, and provided independently of the electrical unit to operate each electrical unit. A centralized operation unit having a unit and a display unit; and input processing of an operation signal of the operation unit, and outputting a control signal corresponding to the operation signal to the first control unit, and output from the first control unit. Second control means for controlling display of the display unit based on a display control signal to be provided, and failure determination means provided in the second control means for determining whether or not each of the first control means has failed. An electronic apparatus characterized by the following. 4. The failure determination unit according to claim 1, wherein the first control unit executes the same operation, and compares the operation results to determine the failed first control unit. An electronic apparatus according to claim 1. 5. The method according to claim 1, wherein when the calculation results of the first control means are different, the failure determination means determines that the first control means having a small number of calculation results among all the calculation results is faulty. The electronic device according to claim 4. 6. The failure determining means causes the first control means and the second control means to execute the same calculation, and compares the calculation result of the first control means with the calculation result of the second control means. 4. The electronic apparatus according to claim 1, wherein the first control unit that has failed is determined by performing the processing. 5. 7. The failure determination means determines that the second control means has failed when the number of calculation results of the first control means that does not match the result of calculation of the second control means exceeds a predetermined number. The electronic apparatus according to claim 6, wherein: 8. The electronic apparatus according to claim 6, wherein the same operation is to convert data detected by the sensor into predetermined operation data. 9. The electronic apparatus according to claim 8, wherein the sensor is one of a temperature control sensor and a temperature display sensor. 10. The electronic apparatus according to claim 1, wherein the second control unit is provided separately from the centralized operation unit. 11. The apparatus according to claim 1, wherein the failure determining means transmits a predetermined arithmetic expression to each of the first control means, and each of the first control means calculates based on the predetermined arithmetic expression. The electronic device according to claim 1. 12. When the control signal is output from the second control means to the first control means, the failure determination means detects a control state of the first control means according to the control signal. The electronic apparatus according to any one of claims 1 to 3, wherein