CN115065628B - Automatic test method and test system for fault code self-clearing of controller without sleep strategy - Google Patents
Automatic test method and test system for fault code self-clearing of controller without sleep strategy Download PDFInfo
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- 238000004140 cleaning Methods 0.000 claims abstract description 9
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses an automatic test method and a test system for automatically clearing fault codes of a controller without sleep strategies, which are applied to the field of automobile CAN bus test and are used for verifying and testing historical fault automatic clearing strategies of the controller without sleep strategies, thereby improving the test efficiency and accuracy. The main constitution includes: a power supply (1-1), an IO on-off control module and a ECU, CANOE, PC computer to be tested; the voltage provides 12V stable voltage for the ECU to be tested, and the PC controls the IO on-off control module and the CANOE to realize execution of a test sequence and storage of test data; the reliability, stability and test efficiency of the self-cleaning test of the fault code of the controller without the sleep strategy are improved.
Description
Technical Field
The invention belongs to the field of automobile CAN bus test, and particularly discloses an automatic test method and a test system for automatically clearing fault codes of a controller without sleep strategies.
Background
With the continuous maturity of the automobile bus technology, the automobile bus communication technology represented by the CAN bus protocol is widely used in host factories. Bus test verification plays an important role in the bus development process, and verifies whether the control unit is developed according to a protocol of a host factory, so that the normal communication of the control unit and the matching of the whole vehicle integration are ensured.
For the historical fault self-cleaning strategy of the controller, the specification requires the controller to automatically clean the historical DTC after 40 fault-free cycles after recording the historical DTC. And a controller without sleep strategy, wherein the circulation mode is IGOFF-IGON. DTC readings and data were taken and examined after 39 and 40 cycles of testing were required during the test. At present, in the field of automobile CAN bus test, in a test implementation scheme for automatically clearing historical faults of a controller, mode circulation cannot be automatically realized according to the requirement of a test sequence due to the fact that a CANoe reads fault codes and voltage on-off, the test depends on manual operation, the operation is complex, the test efficiency is low, and the accuracy is difficult to guarantee.
Disclosure of Invention
In order to solve the problems, the invention provides an automatic test method for automatically clearing fault codes of a controller without sleep strategies, which improves the independent development verification capability and efficiency, shortens the development period of an electrical system and improves the reliability, stability and test efficiency of network bus communication test.
The specific technical scheme of the invention is as follows:
an automatic test method for self-clearing of fault codes of a controller without sleep strategy comprises the following steps:
executing test start in the PC computer;
in the IG-ON mode, CANoe is used for reading the DTC of the ECU to be tested;
then using a signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
then CANoe is used for reading the DTC of the ECU to be tested;
canceling the signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
entering an IGOFF-IGON-DTC reading cycle, which is realized by CANoe through controlling the power supply of an ECU to be tested: the CANoe controls the IO on-off control module through the CAPL program instruction, and the IO on-off control module controls the ECU to be tested to supply power according to the received CAPL program instruction;
after the cycle of continuously operating 41 IGOFF-IGON-reading the DTC is completed, the DTC of the ECU to be tested is read by using CANoe, and data is stored.
As a better technical scheme of the invention: and the CANoe is connected with the ECU to be tested through a CAN line, logic generation is written in the CAPL, the CAN file is loaded by the simulation node, the CANoe is operated, and a DTC message required by the ECU to be tested is sent.
As a better technical scheme of the invention: the IGOFF-IGON-reading DTC cycle is suspended once when the 39 th and 40 th cycles are completed, and the operator waits for the follow-up program to be continuously executed after the operation of the PC, and the whole test program is executed after the 41 th cycle is completed.
As a better technical scheme of the invention: the cycle of the IGOFF-IGON-read DTC is achieved in particular by the following connections: the on-off between the control output end 4 and the control input end 6 is controlled by CANOE; the on-off between the controlled input end 3 and the controlled output end 5 is controlled by the on-off control between the control output end 4 and the control input end 6, and the ECU power supply end 7 to be tested is connected with the controlled output end 5 and is used for controlling the ECU to be tested to supply power according to the received CAPL program instruction by the IO on-off control module; the voltage detection ground terminal 11 is connected with the ECU ground terminal 8 to be detected, and the voltage detection voltage terminal 12 is connected with the ECU power supply terminal 7 to be detected and used for reading the DTC of the ECU to be detected; the IO on-off control end 13 is connected with the control input end 6 and is used for transmitting CAPL program instructions; the CANH test end 15 is connected with the CANH output end 10, the CANL test end 16 is connected with the CANL output end 9, and is used for transmitting signal messages corresponding to the DTCs related to the analog network to the ECU to be tested; the USB data interface 18 is connected with the CANOE data USB-B interface 17 for controlling the PC and the CANOE process and recording test data.
The invention provides an automatic test system for automatically clearing fault codes of a controller without sleep strategies, which comprises the following components: CANoe, which is used for executing clear reading of the DTC of the ECU to be tested, simulating the signal message corresponding to the DTC related to the network, transmitting the signal message to the ECU to be tested, reading the DTC of the ECU to be tested and controlling the power supply of the ECU to be tested;
the PC is used for executing test starting, monitoring test progress and storing test data;
and the IO on-off control module is used for controlling the ECU to be tested to supply power through the CAPL program command according to the CANoe.
As a better technical scheme of the invention: the port of the IO on-off control module comprises a controlled input end 3, a control output end 4, a controlled output end 5 and a control input end 6; the port of the CANoe module comprises a voltage detection ground terminal 11, a voltage detection voltage terminal 12, an IO on-off control terminal 13, an IO on-off control ground terminal 14, a CANH test terminal 15, a CANL test terminal 16 and a CANOE data USB-B interface 17, and the port of the ECU to be tested comprises an ECU power supply terminal 7 to be tested, an ECU ground terminal 8 to be tested, a CANL output terminal 9 and a CANH output terminal 10; the port of the PC computer includes a USB data interface 18.
As a better technical scheme of the invention: the on-off between the control output end 4 and the control input end 6 is controlled by CANOE;
the on-off between the controlled input end 3 and the controlled output end 5 is controlled by the on-off between the control output end 4 and the control input end 6,
the power end 7 of the ECU to be tested is connected with the controlled output end 5 and is used for controlling the power supply of the ECU to be tested by the IO on-off control module according to the received CAPL program instruction;
the voltage detection ground terminal 11 is connected with the ECU ground terminal 8 to be detected, and the voltage detection voltage terminal 12 is connected with the ECU power supply terminal 7 to be detected and used for reading the DTC of the ECU to be detected;
the IO on-off control end 13 is connected with the control input end 6 and is used for transmitting CAPL program instructions;
the CANH test end 15 is connected with the CANH output end 10, the CANL test end 16 is connected with the CANL output end 9, and is used for transmitting signal messages corresponding to the DTCs related to the analog network to the ECU to be tested;
the USB data interface 18 is connected with the CANOE data USB-B interface 17, and is used for controlling the PC and the CANOE process and recording test data.
The beneficial effects are as follows:
based on CANoe bus test tools and CAPL programs, the automatic test of fault code self-cleaning is realized by combining with an IO on-off control module, the independent development verification capability and efficiency are improved, the development period of an electrical system is shortened, and the reliability, stability and test efficiency of network bus communication test are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings to be used in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a block diagram of an automated test system for sleep policy-free controller fault code self-cleaning in accordance with the present invention;
FIG. 2 is a CAPL program emulation node interface of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
As shown in fig. 1, the invention provides an automatic test method for self-clearing of fault codes of a controller without sleep strategy, which comprises the following steps:
executing test start in the PC computer;
in the IG-ON mode, CANoe is used for reading the DTC of the ECU to be tested;
then using a signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
then CANoe is used for reading the DTC of the ECU to be tested;
canceling the signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
entering an IGOFF-IGON-DTC reading cycle, which is realized by CANoe through controlling the power supply of an ECU to be tested: the CANoe controls the IO on-off control module through the CAPL program instruction, and the IO on-off control module controls the ECU to be tested to supply power according to the received CAPL program instruction;
after the cycle of continuously operating 41 IGOFF-IGON-reading the DTC is completed, the DTC of the ECU to be tested is read by using CANoe, and data is stored.
In some embodiments: and the CANoe is connected with the ECU to be tested through a CAN line, logic generation is written in the CAPL, the CAN file is loaded by the simulation node, the CANoe is operated, and a DTC message required by the ECU to be tested is sent.
In some embodiments: the IGOFF-IGON-reading DTC cycle is suspended once when the 39 th and 40 th cycles are completed, and the operator waits for the follow-up program to be continuously executed after the operation of the PC, and the whole test program is executed after the 41 th cycle is completed.
In some embodiments: the cycle of the IGOFF-IGON-read DTC is achieved in particular by the following connections: the on-off between the control output end 4 and the control input end 6 is controlled by CANOE; the on-off between the controlled input end 3 and the controlled output end 5 is controlled by the on-off control between the control output end 4 and the control input end 6, and the ECU power supply end 7 to be tested is connected with the controlled output end 5 and is used for controlling the ECU to be tested to supply power according to the received CAPL program instruction by the IO on-off control module; the voltage detection ground terminal 11 is connected with the ECU ground terminal 8 to be detected, and the voltage detection voltage terminal 12 is connected with the ECU power supply terminal 7 to be detected and used for reading the DTC of the ECU to be detected; the IO on-off control end 13 is connected with the control input end 6 and is used for transmitting CAPL program instructions; the CANH test end 15 is connected with the CANH output end 10, the CANL test end 16 is connected with the CANL output end 9, and is used for transmitting signal messages corresponding to the DTCs related to the analog network to the ECU to be tested; the USB data interface 18 is connected with the CANOE data USB-B interface 17 for controlling the PC and the CANOE process and recording test data.
The invention provides an automatic test system for automatically clearing fault codes of a controller without sleep strategies, which comprises the following components: CANoe, which is used for executing clear reading of the DTC of the ECU to be tested, simulating the signal message corresponding to the DTC related to the network, transmitting the signal message to the ECU to be tested, reading the DTC of the ECU to be tested and controlling the power supply of the ECU to be tested; the PC is used for executing test starting, monitoring test progress and storing test data; and the IO on-off control module is used for controlling the ECU to be tested to supply power through the CAPL program command according to the CANoe.
In some embodiments: the port of the IO on-off control module comprises a controlled input end 3, a control output end 4, a controlled output end 5 and a control input end 6; the port of the CANoe module comprises a voltage detection ground terminal 11, a voltage detection voltage terminal 12, an IO on-off control terminal 13, an IO on-off control ground terminal 14, a CANH test terminal 15, a CANL test terminal 16 and a CANOE data USB-B interface 17, and the port of the ECU to be tested comprises an ECU power supply terminal 7 to be tested, an ECU ground terminal 8 to be tested, a CANL output terminal 9 and a CANH output terminal 10; the port of the PC computer includes a USB data interface 18.
In some embodiments: the on-off between the control output end 4 and the control input end 6 is controlled by CANOE; the on-off control between the controlled input end 3 and the controlled output end 5 is performed through the on-off control between the control output end 4 and the control input end 6, and the ECU power end 7 to be tested is connected with the controlled output end 5 and is used for controlling the ECU to be tested to supply power according to the received CAPL program instruction by the IO on-off control module; the voltage detection ground terminal 11 is connected with the ECU ground terminal 8 to be detected, and the voltage detection voltage terminal 12 is connected with the ECU power supply terminal 7 to be detected and used for reading the DTC of the ECU to be detected; the IO on-off control end 13 is connected with the control input end 6 and is used for transmitting CAPL program instructions; the CANH test end 15 is connected with the CANH output end 10, the CANL test end 16 is connected with the CANL output end 9, and is used for transmitting signal messages corresponding to the DTCs related to the analog network to the ECU to be tested; the USB data interface 18 is connected with the CANOE data USB-B interface 17, and is used for controlling the PC and the CANOE process and recording test data.
The invention provides an automatic test system for automatically clearing fault codes of a sleep-free strategy controller, which comprises a power supply 1-1, an IO on-off control module 1-2, an ECU1-3 to be tested, a CANOE1-4 and a PC computer 1-5. The power supply 1-1 provides 12V stable voltage for the ECU1-3 to be tested, and the PC computer 1-5 controls the IO on-off control module 1-2 and the CANOE1-4 to realize execution of a test sequence and storage of test data. The hardware is based on the bus test tool CANoe1-4 and IO on-off control module 1-2 of German VECTOR, the software is self-cleaning test script program developed by CAPL language supported by CANOE, the 12V voltage-stabilized power supply supplies power 1-1, the PC computer 1-5 executes test start, monitors test progress and stores test data. 41 cycles are performed during the test, the test step is IG-ON before entering cycle 1, then the DTC is read by CANOE, then the program is simulated to manufacture the required DTC, and then the DTC is read by CANOE. The loop mode is as follows, IG-0FF is held for 5 seconds, then IG-ON is held for 5 seconds, and then history DTC is read. The number of completed cycles in the test process is displayed on the WRITE interface of CANOE in real time, so that the test personnel can monitor the test at any time. After the test is started, the test is automatically executed under the control of the program until the system is suspended when each cycle is completed in the 39 th and 40 th cycle processes, the operation interface of the PC presents characters to prompt the tester to check the test progress and check the read DTC, and the tester presses the numeral key 2 to continue to execute the test. At the completion of cycle 41, the entire test sequence is complete.
The port of the power supply 1-1 of the present invention includes a power supply terminal 1, a ground terminal 2. The port of the IO on-off control module 1-2 is controlled by an input end 3, a control output end 4, a controlled output end 5 and a control input end 6. The port power end 7, the ground end 8, the CANL output end 9 and the CANH output end 10 of the ECU1-3 to be tested. The port voltage detection ground terminal 11, the voltage detection voltage terminal 12, the IO on-off control terminal 13, the IO on-off control ground terminal 14, the CANH test terminal 15, the CANL test terminal 16 and the CANOE data USB-B interface 17 of the CANOE 1-4. The port USB data interface 18 of the PC computer 1-5.
The functions of the parts in the structural block diagram of the present invention are described below. The voltage (1-1) provides a stable power supply with a voltage of 12V. The on-off between the control output end 4 and the control input end 6 of the IO on-off control module 1-2 is controlled by CANOE through a CAPL program, namely a self-cleaning test script, and the on-off between the controlled input end 3 and the controlled output end 5 is controlled by the control output end 4 and the controlled output end 6. The power end 7 of the ECU1-3 to be tested is connected with the controlled output end 5 of the IO on-off control module, so that the power end of the ECU to be tested is controlled by CANOE, and the ground end 8 is the ground end of the ECU and is connected with the power ground port 2. The voltage detection ground terminal 11 and the voltage detection voltage terminal 12 of the CANOE1-4 can acquire the power supply voltage of the ECU in real time. The IO on-off control end 13 is an IO on-off control end, and the software is used for controlling the IO on-off control end 13 of the CANOE, so that the working state of the IO on-off control module is controlled, and the automatic circulation of the ECU power supply mode is realized. The IO on-off control ground terminal 14 is a ground terminal, and is commonly connected to the ground of the power supply and the ground of the ECU. CANH test terminal 15 and CANL test terminal 16 are connected with CANH port 10 and CANL port 9 of the ECU under test, respectively. The port 17 is connected with the USB data interface 18 of the PC 1-5 through the USB line of CANOE, and runs CANOE and CAPL programs on the PC to control the test process, monitor and record test data.
The CAPL program of the present invention includes that the nodes are case restart, IO, CAN_IG, on_key, and network management is started, as shown in FIG. 2. Firstly simulating conditions for manufacturing a network related DTC, reading the DTC of the ECU to be tested, then canceling the conditions for simulating the manufacturing of the DTC, controlling a power supply loop to realize the circulation of IGOFF-IGON-reading the DTC, simultaneously recording the circulation times and displaying the time information on a software operation interface, suspending once respectively after the 39 th circulation and the 40 th circulation are completed, waiting for an operator to press the number key 2, continuing to execute a subsequent program, and finishing the execution of the whole test program after the 41 st circulation is completed.
The automatic test system for automatically clearing the fault code of the controller without sleep strategy is used for connecting all hardware firstly, running CANoe1-4 on PC computers 1-5 and loading a CAPL software program;
simulating signal messages corresponding to all network-related DTCs in the node CAN_IG shown in FIG. 2, and enabling the diagnosis ID and the diagnosis response ID in the node start non-network to be in one-to-one correspondence with the ECU to be tested;
manufacturing all network related DTCs by using a node CAN_IG, starting a non-network read DTC by using the node, then starting to run the cycle of IG_on and IG_off, wherein IG_on stays for 5 seconds in the cycle process, IG_off stays for 5 seconds, and recording the number of times of the cycle while executing the cycle and displaying the number of times information on a software operation interface;
and respectively reading DTCs after the 39 th and 40 th cycles are continuously operated, suspending the program operation once respectively, waiting for the operator to press the number key 2 and then continuously executing the subsequent program, and finishing the whole test program after the 41 st cycle is completed. Test data is stored by CANOE for the tester to view.
According to the method, a tester only needs the network related signal message ID and the diagnosis ID of the ECU to be tested, and confirms the number of times and presses the number key 2 in the test process twice, so that a fussy test sequence can be automatically completed, and the test efficiency and the test accuracy are greatly improved.
The data processing unit is used for determining the see-through grade and the attention grade of each gap according to the gap conditions;
and the calculating unit is used for obtaining the total value of the see-through property according to the evaluation formula.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. An automatic test method for self-clearing of fault codes of a controller without sleep strategy is characterized by comprising the following steps of: the method comprises the following steps:
executing test start in the PC computer;
in the IG-ON mode, CANoe is used for reading the DTC of the ECU to be tested;
then using a signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
then CANoe is used for reading the DTC of the ECU to be tested;
canceling the signal message corresponding to the DTC related to the CANoe analog network and transmitting the signal message to the ECU to be tested;
entering an IGOFF-IGON-DTC reading cycle, which is realized by CANoe through controlling the power supply of an ECU to be tested: the CANoe controls the IO on-off control module through the CAPL program instruction, and the IO on-off control module controls the ECU to be tested to supply power according to the received CAPL program instruction;
after the cycle of continuously operating 41 IGOFF-IGON-reading the DTC is completed, the DTC of the ECU to be tested is read by using CANoe, and data is stored.
2. An automated test method for sleep policy-free controller fault code self-cleaning as claimed in claim 1, wherein: and the CANoe is connected with the ECU to be tested through a CAN line, logic generation is written in the CAPL, the CAN file is loaded by the simulation node, the CANoe is operated, and a DTC message required by the ECU to be tested is sent.
3. An automated test method for sleep policy-free controller fault code self-cleaning as claimed in claim 1, wherein: the IGOFF-IGON-reading DTC cycle is suspended once when the 39 th and 40 th cycles are completed, and the operator waits for the operation of the PC to continue to execute the subsequent program, and after the 41 th cycle is completed, the whole test program is completed.
4. An automated test method for sleep policy-free controller fault code self-cleaning as claimed in claim 1, wherein: the port of the IO on-off control module comprises a controlled input end, a control output end, a controlled output end and a control input end; the port of the CANoe module comprises a voltage detection ground terminal, a voltage detection voltage terminal, an IO on-off control ground terminal, a CANH test terminal, a CANL test terminal and a CANOE data USB-B interface, and the port of the ECU to be tested comprises an ECU power supply terminal to be tested, an ECU ground terminal to be tested, a CANL output terminal and a CANH output terminal; the port of the PC computer comprises a USB data interface, and the circulation of IGOFF-IGON-reading DTC is realized by the following connection: the on-off between the control output end and the control input end is controlled by CANOE; the on-off control between the controlled input end and the controlled output end is realized by the on-off control between the control output end and the control input end, and the power end of the ECU to be tested is connected with the controlled output end and is used for controlling the power supply of the ECU to be tested by the IO on-off control module according to the received CAPL program instruction; the voltage detection ground terminal is connected with the ground terminal of the ECU to be detected, and the voltage detection voltage terminal is connected with the power supply terminal of the ECU to be detected and used for reading the DTC of the ECU to be detected; the IO on-off control end is connected with the control input end and is used for transmitting CAPL program instructions; the CANH test end is connected with the CANH output end, and the CANL test end is connected with the CANL output end and is used for transmitting signal messages corresponding to the DTCs related to the analog network to the ECU to be tested; the USB data interface is connected with the CANOE data USB-B interface and is used for controlling the PC and the CANOE process and recording test data.
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