Review on JOYING ELM 327 V2.1 Bluetooth OBD2 Diagnostic Tool: Android Car Interface Scanner for Vehicle Analysis by Shaun Jdi ᠌

Refrain from using the car online (while driving), because in the future there may be surprises with the ECU, namely, this scanner can figuratively damage the ECU firmware, for example simply: you decide to monitor the temperature of the coolant liquid online while driving - and it would seem that the device shows indicators on your smartphone, though the connection with the smartphone falls off, but this does not stop you and you reconnect the connection on the smartphone, then you hear a signal from the dashboard (short beep) every time you reconnect and also think some kind of nonsense, and here are with a dozen reconnections, and after you can expect a surprise, which thread is a "glitch" from the ecu along the electric circuit, for example, you have a egur - it may fail, etc. and the icon on the dashboard will indicate this to you, the icon as it is popularly called "saw" . In general, the use of this scanner may affect the operation of the computer - be careful if you hear a signal from the dashboard in the form of a short signal, then it is better to refrain from further use because the dashboard signals and warns of an impending problem, and not just beeps for the background to the playing music in the car . Checked on LADA XRAY - where the ECU butting with this obd scanner led to the shutdown of the egur in the end, but the XRAY ECU held on for a long time, signals from there were several dozen dashboards, but in the end the ecu could not stand it and gave out a glitch . - For those who suddenly happen to have this, it is treated on their own and without the help of an electrician who will rip off the last money from you, just throw it off for 10 minutes. the negative terminal with the car, after connecting it back, plugging it in immediately, do not start the car, plug in the ignition key, turn it until the internal combustion engine starts, but do not start the engine, wait, say, a minute, let the ecu reboot and the glitch will be fixed by the ecu . In general, this seemingly harmless toy can harm your car, be careful .