JP2569520B2 - Electronic control device and its inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an inspection apparatus for an electronic control unit such as an in-vehicle ECU (Electronic Control Unit), and particularly to software having the same hardware and incorporating differences in destinations and vehicle types. The present invention relates to an electronic control device and an inspection device thereof.

[Prior art] An electronic control unit (hereinafter referred to as "ECU") that has the same hardware and different specifications depending on software,
For example, ECT (Elect
In the case of performing a functional inspection of a product (ronic Controlled Transmission) etc. in the final inspection process before shipment from the factory, the following various methods are considered. Conventionally, it seems to be optimal according to the quantity and inspection items among these. They had to select and inspect.

That is, first, a function test is performed in which a function is set by a function test apparatus in a test mode based on a label (for example, a product number) affixed to the ECU.

Secondly, a special check pin is provided on the printed circuit board in the ECU, and a certain signal is input from this pin.
A method of determining the specifications of U and performing a function test according to those specifications.

Thirdly, special terminals are provided from the ECU connector.
A method of performing a function test by determining the ECU specifications by sending and receiving signals from this terminal.

Fourth, a method of inputting a predetermined signal to the ECU, judging the specification of the ECU by looking at the output signal, and automatically selecting an inspection program.

[Problems to be Solved by the Invention] Conventional Problems However, among the various types of inspection means described above, in the first means, if a worker misreads a label and operates it, an erroneous determination occurs. The ECU must be disassembled and investigated to investigate the cause.If the microcomputer is incorrectly assembled in the previous process or a label is incorrectly attached, the ECU will be passed directly to the inspection device and judged as NG. However, in this case, there is a problem that it is not immediately known whether the error is due to an NG in the ECU function or an assembly error.

Further, in the second means, since the ECU generally needs to be inspected in a final completed state, it is impossible to apply a check pin signal to a built-in printed circuit board, and it is actually difficult to use.

Further, in the third means, the hardware needs to be changed, but this must be avoided in order to reduce the cost of the ECU, which is not a good idea.

Furthermore, in the fourth means, there is a case where it is not possible to judge whether an output signal is output due to a difference in software in the ECU, and a correct inspection cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has an electronic control device capable of automatically determining the specifications of an electronic control device without performing additional hardware and performing a function test. It is intended to provide the inspection device.

[Means for Solving the Problems] In order to achieve the above object, an electronic control device according to the present invention includes a memory element in which different software is stored due to a difference in specifications, and a memory element in accordance with an input signal. An electronic control device having an output port for transmitting contents, and a specification code storage unit for storing a specification code,
A specification code is output from the output port for a predetermined period after power-on.

Further, the inspection device of the electronic control device according to the present invention stores a memory element in which different software is stored due to a difference in specification, an output port for transmitting the content of the memory element in response to an input signal, and a specification code. A specification code storage unit for performing a function test of an electronic control device that controls a controlled device according to software stored in the memory element, wherein an output port of the electronic control device is provided for a predetermined period after power-on. Means for inputting a specification code signal output from the controller, a memory for storing a test program for performing a function test in accordance with the specification of the electronic control unit, and means for selecting a test program corresponding to the input specification code signal And performing a functional test of the electronic control device based on the selected test program.

With this configuration, when the power is supplied to the ECU, a reset signal is output from the ECU to be in an initial state.
Is output from the specification code output unit to the inspection unit via the connector.

In this case, the certain period refers to a short period of time during which a mechanical device or the like connected to the ECU does not operate.

In the inspection unit, an inspection controller determines ECU specifications based on a specification code signal from the ECU,
A predetermined function test program according to this specification is automatically selected, a similar test signal is sent to the ECU, and a signal output through an internal circuit of the ECU based on the input signal is observed. Determine if it is working properly.

As described above, according to the present invention, the type of the EUC is automatically determined by using a short time after the power is turned on, and then the ECU is quickly checked for the quality of the ECU by the inspection program corresponding to the type.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic configuration of an in-vehicle ECU inspection apparatus according to the present invention.

In the figure, the ECU 100 and the ECU inspection unit 200 are connected via a connector 400, and the ECU 100 and the ECU
A load unit 300 including various actuators is connected between the inspection units 200.

The ECU 100 mounted on the vehicle has the same internal hardware and memory elements depending on differences in specifications such as destination and vehicle type.
The software is different depending on 130, and the control pattern for matching the difference between the engine types, such as ECT, has a slightly different content.

Here, a characteristic of the present invention is that an ECU including a specification code storage unit that outputs a code signal corresponding to the specification for a certain period of time to the outside from a reset release of a reset signal generated by turning on the power, and the ECU. An input / output unit that sends and receives signals to and from the ECU, an inspection controller that determines an ECU specification based on a specification code signal from the ECU, and an inspection unit that includes an inspection program that performs a function inspection according to the ECU specifications It is.

That is, the ECU 100 includes a controller 110 such as a microcomputer, a memory element 130, and a specification code storage unit 14.
0, and input / output ports 160, 170, and when the power supply 150 is turned on, the reset circuit 120
A reset signal is sent out. In this case, when the inspection start button 270 of the inspection unit 200 of the ECU is turned on, the inspection controller 210 excites the relay 230 to turn on the power supply 12.
0 to the ON operation state, whereby the EC is
Power is supplied to the power supply 150 in the U100.

Then, the controller 110 outputs a code signal corresponding to the ECU specification from the specification code storage unit 140 to the ECU inspection unit 200 and the load unit 300 via the output port 170 for a certain period from the reset release.

That is, in the time chart shown in FIG. 2, the actuators L1 to L3 for the time TW after the lapse of the fixed time T0.
To output the initial pattern signal PTN-A. This signal is a signal applied to the actuator solenoid of the ECU such as a motor, a light emitting diode, and a relay, and differs depending on the type of the ECU.

In the specification code storage unit 140, different memories are prepared for different ECUs as shown in FIG. 3, and a memory storing the signal output holding time TW (for example, the BCD code minimum unit in one byte) 0.1 msec), the signal output waiting time TD, and 0/0 of the pattern PTN indicating the type of the ECU 100.
Shown in combination of 1.

The TW time is set to a time sufficiently shorter than the actual operation of the actuator, for example, 1 msec, because inconvenience occurs when the actuator is operated by the PTN-A signal. Then, after waiting for TD time, the pattern PTN-B indicating the ECU specification difference is output during TW. In this case, in the embodiment, seven types of ECUs can be determined.

Next, the operation of the ECU inspection unit 200 is performed based on the flowchart of FIG.

That is, the inspection unit 200 observes the signal to the actuators L1 to L3 output from the ECU 100 after the power supply relay 230 is excited in Step 10, and
At 20, an initial pattern PTN-A is observed to confirm that a trigger signal for outputting a type signal of the ECU 100 has been input. Subsequently, in step 30, the ECU pattern PTN-B is observed, and in step 40, the controller 210 determines what kind of specification of the ECU 100 is.

The inspection unit 200 has 26 inspection programs for each ECU.
It is stored as a memory from 0 to 267 (step 5
0), when the controller 210 determines the ECU pattern PTN-B, the inspection program corresponding to the ECU 100 is referred to as 260 to 267.
And output a pseudo signal from the output port 240 to the ECU, while observing the state at the input port 250, and
The controller 210 determines whether or not is operating correctly, and displays OK / NG and the status of the ECU on the display 280.

As described above, according to the embodiment of the present invention, the ECU
There is no need to add new hardware to output the specification code to the system, and the memory can be used in a sufficiently small amount, so that the surplus memory used for control can be used. No problem.

Further, according to the means for inquiring the type of the ECU from the outside as in the prior art, if the request signal state is erroneously made when mounted on the vehicle, there is a possibility that only the type of the ECU will be output. According to this, there is an advantage that other controls are not affected at all by using only a short time after the power is turned on.

[Effect of the Invention] As described above, the present invention provides an ECU that outputs a signal of a specification code stored as software in a specification code storage unit from an output port that normally has a specification code signal and a specification code signal based on the specification code signal from the ECU. Inspection unit equipped with an inspection controller and a function inspection program for determining the type automatically executes the inspection program according to the type without newly adding hardware for outputting the specification code to the ECU. Can be determined.

[Brief description of the drawings]

FIG. 1 is a schematic configuration explanatory view of an inspection device for an in-vehicle ECU according to the present invention, FIG. 2 is a diagram showing a time chart from a power-on state of the ECU to outputting a specification code, and FIG. FIG. 4 is a diagram showing a control flowchart in the ECU inspection unit. 100 ECU 110 Controller 130 Memory element 140 Specification code storage unit 200 ECU inspection unit 210 Inspection controller 260 to 267 Inspection program.

Claims (2)

(57) [Claims] A memory device storing different software according to a difference in specifications; and an output port transmitting contents of the memory device in response to an input signal, wherein a controlled device is controlled in accordance with the software stored in the memory device. An electronic control device for controlling a device, comprising: a specification code storage unit for storing a specification code; and outputting the specification code from the output port during a predetermined period after power-on. And a specification code storage unit for storing a specification code, wherein the memory element stores different software according to a difference in specification, an output port for transmitting the contents of the memory element in accordance with an input signal, and a specification code storage unit. In a test device for performing a function test of an electronic control device that controls a controlled device in accordance with software stored in a memory element, a specification code signal output from an output port of the electronic control device during a predetermined period after power-on is input. Means for performing a function test according to the specifications of the electronic control device, and a means for selecting a test program corresponding to the input specification code signal. An inspection device for an electronic control device, wherein a function inspection of the electronic control device is performed based on a program.