JPH0830890A - Device for testing wiring for vehicle electrical equipment - Google Patents

Abstract

PURPOSE:To shorten the maintenance time by providing a check function and judging the disconnection of wiring in a short time without using a measurement device and the fault of each switch and sensor. CONSTITUTION:The device is provided with a sensor which detects the operation state of each part of the vehicle, operation judgement part (ECU) 10 which detects the electrical connection and release with an electical equipment 7 which is operated by the discrimination result, and display means 11 which displays the discrimination result. The part 10 starts discrimination when the electrical connection of the equipment 7 is released. The release of the electrical connection is detected by removing a socket comprising the end part of the wiring from the part 10 from the electrical equipment 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring inspection device for various electric components mounted on a vehicle, and more particularly to an electronic control unit (ECU: Elec).
trical control unit), which relates to a device for inspecting wiring based on a signal input to the trical control unit.

[0002]

2. Description of the Related Art Conventionally, a vehicle electrical component such as a stop and hold device and an anti-lock brake is controlled by an ECU dedicated to the vehicle electrical component based on a signal from a sensor that detects the operation of an operating portion constituting the electrical component. A control system has been proposed.

For example, in Japanese Utility Model Laid-Open No. 3-9325,
In a braking force holding device equipped with a dedicated ECU, the door is closed when the driving state of the vehicle is detected while the braking force is held by energizing the electromagnetic check valve according to the well-known conditions of the vehicle state. Disclosed is a technique in which the electromagnetic check valve is deenergized to release the braking force only when it is detected, so that one system of the electromagnetic check valve prevents erroneous start with the door open.

[0004]

However, in such a conventional system in which the ECU for a vehicle electric component controls the signal based on a signal from the vehicle electric component, a new vehicle for inspection is newly added. The wiring could not be routed, and the fail-safe function could not be added to the ECU dedicated to vehicle electrical components.

Therefore, in a vehicle using these techniques, the system will not operate normally when the wiring with various electric components, each switch, or each operation sensor fails, and the measuring instrument is used for investigating the cause. There was a problem that it took time because of the electrical check and logic check using.

The present invention has been made in view of the above-mentioned matters, and based on a signal from a vehicle electrical component, an EC dedicated to the vehicle electrical component is provided.
The purpose of the system is to reduce the maintenance time by providing a wiring check function in the system that performs the control by U and determining the disconnection of the wiring and the failure of each switch and sensor in a short time without using a measuring instrument. .

[0007]

The present invention has the following constitution in order to solve the above problems.

That is, according to the first aspect of the present invention, a sensor for detecting the operating state of each part of the vehicle, the detection signals from the respective sensors are input to determine the operating state, and the operation is performed based on the determination result. The operation determining unit (ECU) has an operation determining unit (ECU) that detects electrical connection / disconnection with an electrical component, and a display unit that displays a determination result of the operation determining unit (ECU). , When the electrical connection of the electrical component is released, the operation determination unit (E
A wiring inspection device for a vehicle, which starts a determination process in CU).

A second configuration of the present invention is the vehicle wiring inspection device, wherein the operation determination unit (ECU) is
A wiring inspection device for a vehicle, which detects disconnection of the electrical connection by removing a socket forming an end portion of a wiring from the operation determination unit (ECU) from the electrical component.

[0010]

In the above structure, since the operation determining unit (ECU) for determining the operation state of each part mounted on the vehicle and the operation display means are provided, the wiring between the vehicle, the switch, the operation sensor and the like and the ECU are connected. The occurrence of a failure can be easily detected.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 is a principle view showing an embodiment in which the present invention is adopted in a vehicle stop and hold system.
FIG. 3 is a configuration diagram of the device.

The system switch 1 (SW1) is a switch for starting the entire system. The parking brake switch 3 outputs a signal when the parking brake lever 4 is pulled, the door sensor 5 outputs a signal when the door is open, and the speed sensor 6 outputs a signal when the wheels are rotating. .

The solenoid valve 7 retains the braking force even when the brake pedal 8 is released when stopped. The ECU 10 includes the parking brake switch 3, the door sensor 5, and the speed sensor 6
A control unit (ECU as a part of the stop holding device) for controlling the solenoid valve 7 based on a signal from the sensor and a detection signal from each sensor to input the operation state of the operation portion, and
Operation determination unit (E that detects electrical connection / disconnection with the solenoid valve)
CU).

The display lamps 9p, 9d and 9s respectively indicate the operation / non-operation of the vehicle side switch / sensor, and the display portion 11 is provided with the display lamps 9p, 9d and 9s.

<Determination Process Starting Means of First Embodiment> A procedure for starting the determination process in this embodiment will be described with reference to the flowchart of FIG.

In step 101, the ECU 10
When recognizing that the electrical connection of the solenoid valve 7 has been released, the SW
1 determines whether the ON-OFF operation is performed 5 times in 3 seconds (102). As a result, the wiring confirmation mode is entered (determination processing starts).

That is, it is a determination processing start instruction means by logic. In the present embodiment, the condition for shifting to the wiring confirmation mode is set to be double so that the determination process is not started by the driver's erroneous switch operation. The conditions may be.

<Function of ECU for Dedicated Stop / Hold Device> In the present embodiment, the existing ECU 10 for a stop / hold device is used as an operation determination unit (ECU). The original function of the ECU will be described.

The ECU 10 includes a central processing unit (C
PU), a main storage device (memory), and an input / output control device (I / O). A program stored in the memory via the I / O for holding the stopped state of the vehicle is as follows. Run like.

First, when the brake pedal 8 is stepped on and the stop of the vehicle is recognized by the signal from the speed sensor 6, the ECU 10 exclusively for controlling the stop holding device controls the solenoid valve 7 to control the inside of the wheel cylinder 12 of the brake mechanism. Keep the fluid pressure at a certain level or higher. By controlling in this way, the vehicle is maintained in a stopped state even if the driver releases his foot from the brake pedal 8.

<Function as Operation Determination Unit (ECU)> Next, the function of the ECU 10 as another operation determination unit (ECU) will be described.

In this embodiment, the program stored in the memory via I / O is executed as shown in the flowchart of FIG. First, when the determination processing start instruction means instructs the determination processing start, the signals from the parking brake switch 3, the door sensor 5, and the speed sensor 6 are read (steps 201, 202, 203). When each operating part is in the operating state based on the detection result, the display means (9p, 9d, 9s) corresponding to each operating part is instructed to display (light).

The displays corresponding to the respective operating parts are specifically as shown in Table 1.

[0024]

[Table 1]

In this embodiment, the lamp is used as the display means, but in addition, a buzzer, a chime, or a buzzer that emits a sound of a specific tone color, pitch, or length set so that it can be identified as the operating portion is used. It is possible to use a voice, such as a language reproduction (which is held in a memory in an analog or digital manner and is output to an external audio device through an I / O when necessary). In that case, system switch 1 (SW1)
In addition, a function of selecting activation by only the display lamp and activation by all display means may be added. Table 2 shows an example of the display of the judgment result by voice.

[0026]

[Table 2]

[Second Embodiment] A second embodiment in which the present invention is applied to a vehicle stop and hold system will be described. This embodiment has the same main configuration as that of the first embodiment, but is different only in the judgment processing starting means. The determination processing start means of this embodiment will be described below. <Determination Process Starting Means of Second Embodiment> A procedure for starting the determination process in the present embodiment will be described with reference to the flowchart of FIG.

At step 301, the ECU 10
When recognizing that the socket forming the end of the wiring that extends by itself is removed by removing the solenoid valve 7, it is determined whether or not the SW1 has been turned on / off five times in three seconds, as in the first embodiment (302). ). As a result, the wiring confirmation mode is entered (determination processing starts).

In the first embodiment, the determination processing start means determines whether or not the electrical connection of the solenoid valve 7 is released, and the process proceeds to the next step 102. The connection / disconnection is detected depending on whether the socket is connected or not.

[0030]

According to the present invention, when the wiring of various electric components of a vehicle, each switch, or each operation sensor fails,
It will be possible to shorten the maintenance time without the need for electrical confirmation using a measuring instrument or logic check for investigating the cause.

Further, by using the existing ECU,
The operating state can be easily checked without increasing the size of the system.

[Brief description of drawings]

FIG. 1 is a principle diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an apparatus according to a first embodiment.

FIG. 3 is a flowchart showing a procedure for starting a determination process in the first embodiment.

FIG. 4 is a flowchart of a program of an operation determination unit (ECU).

FIG. 5 is a flowchart showing a procedure for starting a determination process in the second embodiment.

[Explanation of symbols]

 1 System switch (SW1) 3 Parking brake switch 4 Parking brake lever 5 Door sensor 6 Speed sensor 7 Solenoid valve 8 Brake pedal 9d Door sensor display lamp 9s Speed sensor display lamp 9p Parking brake switch display lamp 10 Stop holding device control ECU (Actuation determination part) 11 Display part 12 Wheel cylinder

Claims (2)

[Claims] 1. A sensor for detecting an operating state of each part of a vehicle, an input of a detection signal from each of the sensors to determine its operating state, and an electrical connection / disconnection with an operating electrical component based on the determination result. Detection unit (EC
U) and a display unit that displays a determination result in the operation determination unit (ECU), and the operation determination unit (ECU) performs the operation when the electrical connection of the electrical component is released. A wiring inspection device for a vehicle, which starts determination processing in a determination unit (ECU). 2. The operation determining unit (ECU) detects disconnection of the electrical connection by removing a socket forming an end of a wiring from the operation determining unit (ECU) from the electrical component. The wiring inspection device for a vehicle according to claim 1, wherein: