The OBD system will monitor whether the car's exhaust exceeds the limit from the engine's operating status at any time, and will immediately issue a warning if it exceeds the limit. When the system fails, the fault (MIL) light or the Check Engine (Check Engine) warning light is on, and the powertrain control module (PCM) stores the fault information in the memory, and the fault code can be read from the PCM through a certain program . According to the prompt of the fault code, the maintenance personnel can quickly and accurately determine the nature and location of the fault.
OBD monitors the engine, catalytic converter, particulate trap, oxygen sensor, emission control system, fuel system, EGR and other systems and components in real time. Then connect to the ECU [electronic control unit, which can detect and analyze the function of emission-related failures] through different emission-related component information. When an emission failure occurs, the ECU records the failure information and related codes, and sends it through the failure light Warning, inform the driver. ECU guarantees the access and processing of fault information through standard data interface.
The full name of OBD:
On Board Diagnostics, is a detection system extended for automobile fault diagnosis. "OBD Ⅱ" is "on Board Diagnostics Ⅱ", the abbreviation of Type Ⅱ on-board diagnostic system.
In order to standardize the diagnosis of vehicle emissions and drive-related faults, starting from 1996, all new vehicles sold in the United States must have similar diagnostic equipment, fault codes and maintenance procedures, that is, comply with OBD II procedures.
With the increasing degree of economic globalization and automobile internationalization, the OBD Ⅱ system will be more and more widely implemented and applied as the basis for driving and emission diagnosis.
The OBD Ⅱ program makes automobile fault diagnosis simple and uniform, and maintenance personnel do not need to learn new systems from each manufacturer.
Automobile diagnostic instruments can only diagnose non mechanical faults.
Sensors, communications and control actuators can basically check that they have electricity.
Therefore, they can detect and calculate some non electronic fault points.
For example, the three-way catalytic converter is damaged. It is possible to analyze the data received by the sensor, but it may still need to be done It can be determined only after the technician's further confirmation. The detection range also depends on the actual demand. For some very simple faults, there is no need to make special detection lines, which will increase the cost and maintenance difficulty. It is mainly considered in reasonable terms. Not every vehicle is the same. The fault diagnosis instrument only extracts the data and fault code provided by the original car computer, and does not have the fault of detecting the engine The barrier function is only to extract data and do some matching, touching and recording of some original computer settings.
vLinker series support auto wake up after hibernation for gasoline car, icar pro can support gasoline car, icar 123 does not support auto wake up
After the firmware version of vLinker series is updated to 2.2.82, it can support auto wake up for electric vehicles, icar pro does not support it.
Wake-up mode:
1. Wake up by button (MC series)
2. Wake up by cell phone connection (MC+,MC)
3. Wake up by vehicle start (vLinker series)
4. Wake up when there is data stream (vLinker series)
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