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Showing 1 of 63 conversations about:
Crozone
27
Dec 14, 2016
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Does this have any real security built into it? I stopped using one of those cheap Chinese clone versions because the BT passcode was 0000, and literally anyone could access my CAN bus and disable my breaks or turn off my engine.
Crozone
27
Mar 12, 2017
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JohndonglongOf course you can, just tell the brake module that you're stationary and then enter bleed brakes mode. If your car is self parking, you can even turn the steering wheel.
Johndonglong
13
Mar 12, 2017
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CrozoneObd2 is purely diagnostic you cannot write commands like that and if you can then I learned something new today
Crozone
27
Mar 12, 2017
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JohndonglongODB-II is usually implemented (in most cars) as a direct access to the internal CAN bus. This is usually used to run diagnostics by talking to the ECU or other modules, but it can be used maliciously to emulate modules and get car hardware to perform potentially lethal operations while driving. Some cars implement a firewall between the ODB-II CAN bus and internal CAN bus, but most don't. Recently the JEEP Grand Cherokee had an issue where people could hack the internet enabled head unit and use it to access the can bus, enable the electronic e-brake, turn the wheel, and access the ECU. It demonstrates the importance of keeping the ODB-II port and CAN bus secure.
Ducky21
16
Apr 27, 2017
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CrozoneIt depends on what kind of car you have and how much of it is DBW. A 1996 Miata I would happily leave an OBD2 reader plugged in 24/7 because there's nothing there to modify. The ECU is EPROM and not EEPROM, the throttle, brakes and steering are all controlled by physical objects that have sensors telling the ECU what position they're in.
Nickr71
4
May 9, 2017
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CrozoneOn most cars you can only use the OBD II for diagnostics and in order to communicate with the ECU you need additional connections near your OBD II port. Forgive the fact that I don't know the name of these connectors, but it essentially is a security measure which requires you to complete 2 additional circuits before you are allowed to communicate with the ECU through OBD II. I know for sure that Subaru WRX's have them as I have to do this every time I want to remap the ECU in mine.
rustyfender
1
Jun 1, 2017
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Crozone brakes are hydraulic the way the valvebody is made for ABS it cannot fully shutoff your brakes. infact tis fail state is fully open as if there was no ABS at all. whether you could program the computer to try and do that or not the valvebodys are not capable of shutting a persons brakes off. shutting the engine off is an annoyance at worst and doesnt present a life threat
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