Elecdeer Car Diagnostics OBD interface Using ELM327 diagnostic plug
Elecdeer Car Diagnostics OBD interface Using ELM327 diagnostic plug
The location of the OBD interface, so what can the OBD interface be used for? The OBD interface is a general-purpose diagnostic interface. From this interface, we can read some real-time sensor data and fault codes of the car. So, let’s talk about this issue today.
First of all, the data and fault codes that can be read by the OBD interface are divided into two types: general OBD information and manufacturer-specific OBD information. The former can be read by various general-purpose diagnostic instruments, including power module fault codes, engine water temperature, Engine speed, ignition timing, etc. OBD standard information. The latter needs to support the manufacturer's software and equipment to read. For Mazda, the original software is IDS, and third-party software such as Forscan can read the manufacturer's dedicated OBD information, including the working status of the oil pump and fan. conditions, the working conditions of each solenoid valve and so on. Moreover, some matching programming can also be performed, such as matching anti-theft keys, setting the midpoint of power assistance, and so on.
So let’s introduce these devices today. Let’s start with the original IDS. The original IDS needs VCMII or other VCMII-like devices to connect the car and your computer, such as the VX below.
Such "open source?? free??" OK. . . In fact, it is a pirated diagnostic instrument, which can simulate VCMII, allow IDS to communicate with the vehicle, and realize almost all the functions of genuine IDS.
What can an IDS do that a general-purpose diagnostic device can't? For example, the module fault code
We can see that in addition to PCM, there are also fault test functions for modules such as EPS IC RCM, etc., which cannot be detected by general-purpose diagnostic instruments.
As for the freeze frame, it records the status of each sensor at the moment when the fault occurs, helping you analyze the cause of the fault.
This is also a function that some general-purpose diagnostic instruments cannot achieve. For example, if we want to test whether the fan is normal, we can use IDS to control the start of the fan (without waiting for the pre-start temperature), control the opening and closing of each valve, etc., to help diagnose the problem. where.
So, how much does such a set of equipment cost? Even the pirated VCM equipment still needs about 600-1000 USD, which is not so cost-effective. Of course, this is for ordinary users, and the genuine IDS equipment is authorized to add a computer. The price given by the manufacturer is 150000.
Therefore, for individual users, I recommend the following combination! This is a software made by a third-party company that uses the ELM327 device to realize the IDS function. The name is Forscan.
ELM327 is a diagnostic plug that can be easily purchased online. The WIFI connection method is more convenient and practical. Another advantage is that it can be directly connected to your mobile phone for use. Forscan has a PC version, an ios version, and an android version, and except for the PC version, they are all charged, and only have a diagnostic reading function, no programming and control functions, but for the daily use of ordinary users, this should be enough up.
Forscan can read a large amount of data that can only be read by the original computer, such as fan control signals, the working status of metering oil pumps, etc., and can also be collected and saved, and sent to other people (such as me) for remote Diagnosis, and all you need is to buy this plug called ELM327 wifi and the Forscan mobile version worth 30 yuan for about 90 yuan.
But the functions of this ELM327 are far more than these. You can also use some other software, such as dashcommand, to check the instantaneous fuel consumption and average fuel consumption to improve your driving.
Ok, are you interested? If you are interested, go buy a set and play!