Method and detector for identifying automobile electric control module
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An electronic control module, automotive technology, applied in the direction of instrument, measurement, version control, etc., to achieve the effect of high accuracy and improve the efficiency of diagnosis and maintenance
Pending Publication Date: 2020-11-24
SHANGHAI XINGRONG AUTOMOBILE TECH CO LTD
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[0005] The current routine operation is to determine which electronic control modules are configured on the vehicle through the 250K bit/s broadcast frame address on the CAN line. The derived vehicle diagnostic functions include vehicle module identification, CAN node scanning, etc., b
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[0045] Example 1: Identify the Volvo brand car electronic control module and version number
[0046] The operator recognizes the brand and model of the car, corresponds to the interface type of the car OBD port, and connects the car diagnostic instrument and the car OBD port.
[0047] Then select the corresponding car brand and model on the car diagnostic instrument, Volvo self-identification logic is on the CAN line, and the communication command is sent at a baud rate of 500K bit / s, so the steps to identify the car electronic control module are as follows:
[0048] Determine module by detecting address
[0049] Send the instruction 02 3E 00 00 00 00 00 00 with the sending address SendID: 18DBFFF2 / / 1F41FFF2, the receiving address configured in the database is RecvID: 18DAF200 / / 1F40F200, and the mask address is MaskID: FFFFFF00, all addresses that can be received can be obtained The collection 18DAF2? ? / / 1F40F2? ? , According to the received response address to confirm which elec...
Example Embodiment
[0063] Example 2: Identifying the electronic control module and version number of the Cat brand car
[0064] Unlike the Volvo car in Example 1, the self-recognition logic of the Carter body module sends detection commands at a baud rate of 57600 bit / s through the RS-485 bus.
[0065] The steps to determine the module of the body configuration by detecting the address are as follows:
[0066] Through the 485 module, at the baud rate of 57600bit / s, the target address is not limited, and the source address 0D is used to send the query command 20 80, and the received response address is used to determine which electronic control modules are configured on the Cat brand vehicle, and identify the corresponding The software version of the electronic control module.
[0067] The analysis rule of the electronic control module software version: the received response data, directly record the hexadecimal data, the location of its analysis is X04X05X06X07X08X09, get the corresponding software vers...
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Abstract
The invention discloses a method and a detector for identifying an automobile electronic control module. The method comprises the following steps: establishing a corresponding relationship among an automobile brand, an automobile model, a query instruction baud rate, a module query sending address, a module query instruction and a version number query instruction; establishing a corresponding relationship among the response address of the electric control module, the electric control module and the version number query sending address; establishing a corresponding relationship between the received data after the version number query instruction is sent and the version number of the electric control module; based on identifying and detecting the brand and the model of the vehicle, connecting the vehicle-mounted OBD to the automobile diagnosis instrument, enabling the automobile diagnosis instrument to send a specific inquiry instruction on a communication bus according to the specific communication baud rate of the automobile diagnosis instrument, determining which electronic control modules are configured on a current vehicle according to the ECU response address, and identifying the software version corresponding to the electronic control modules. The invention has the advantages that which electronic control modules and corresponding software versions are configured for the vehicle can be quickly identified, the accuracy is high, and the diagnosis and maintenance efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of vehicle inspection and maintenance, in particular to a method for identifying an automobile electronic control module and a detector for identifying an automobile electronic control module. Background technique [0002] In recent years, with the application of electronic technology, computer technology and information technology, automotive electronic control technology has developed rapidly, especially in the aspects of control accuracy, control range, intelligence and networking. Automobile electronic control technology has become an important symbol to measure the development level of modern automobiles. [0003] Automotive electronic control systems consist of sensors, electronic controllers, drivers, and control program software, etc., and work with the mechanical systems on the vehicle (often fused with subsystems in the powertrain, chassis, and body systems) and utilize cables or radios Waves tran...
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