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8 votes
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Controlling door lock/unlock via CAN bus

The OBD-II port supports a number of electrical protocols, but all of them are serial in nature. There is nothing you can do to any of the OBD-II pins with "plain negative pulses" to do what you want ...
cdunn's user avatar
  • 9,296
8 votes
Accepted

Is there a way to use a PC as an ECU for testing CANBUS Sniffer devices?

Sadly you are not going to be able to do what you want simply connecting CAN-H and CAN-L to a serial port. Here is a pointer to the physical interface layer for CANBUS. CANBUS Physical layer ISO ...
cdunn's user avatar
  • 9,296
7 votes

About heavy-duty vehicle diagnostic port

Isn't it a standard, so all vehicles are wired the same (for a given connector)? The following information comes from the Handbook of hardware schemes, cables layouts and connectors pinouts website. ...
Weather Vane's user avatar
  • 2,339
6 votes

Received frames from vehicles with multiple ECU chips

If your vehicle is 2008 or newer it is using the can protocol, you can use the AT CR command to select which ECU you want to hear from. Here's how: send AT H1 this will turn on headers to see the ...
godzilla's user avatar
  • 251
5 votes
Accepted

Can I turn the steering wheel in Honda Civic 2017 (No Honda Sending) by sending commands via CAN bus (OBD ii port)?

No not directly through the OBDII port. There is no way of sending steering activations through OBD even with dealer level diagnostic equipment. Imagine the safety implications if this was possible. ...
Newbie Noob's user avatar
  • 2,781
5 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

Just this morning I connected an ELM327 to a '05 Volvo XC90. After only 1km, the message was displayed for "Anti-skid service required", and then "Anti-skid temporarily unavailable". I removed the ELM,...
Pete T.'s user avatar
  • 51
5 votes

OBD or CAN - what's mandatory (EU and US)

I believe you are confusing CAN and OBD. CAN is an electronics interface protocol. Short for Controller Area Network, CAN allows for expandable interconnected systems, so you can add new sensors and ...
Hari's user avatar
  • 781
4 votes

OBD-II Mode and PIDs specifically used for Electric vehicles?

It seems like every (lots of people on this forum) one is mixing up what OBD is and what CAN is. OBDII is a standard ratified in 1996 in the US. This standard is required by the government and ...
vini_i's user avatar
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4 votes
Accepted

Why modern car networks are known as "unsafe"?

In an ideal world, you are right, the entertainment system should be entirely separate from engine management, navigation, locks, immobiliser etc. But the world isn't ideal, and many decisions are ...
Rory Alsop's user avatar
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4 votes

Sniffing the CANbus on an Audi A5

I don't see how this is different from your previous question. No data is actively sent to the OBD port on late VAG vehicles as this in connected to a gateway and only responds to PIDs and ...
Newbie Noob's user avatar
  • 2,781
3 votes

What happens if I shortcut the CANBUS?

CAN signals are extremely low current signals and, by design, no damage will occur if either CAN High or Low are shorted to each other, B+ or ground. I have seen many shorted CAN signals caused from ...
L.hawes's user avatar
  • 121
3 votes
Accepted

Connecting to car CANbus

You cannot access the CAN bus for any useable data from the OBD port in late VAG vehicles. The port only responds to PIDs and manufacturer specific data as it is connected to a communication gateway. ...
Newbie Noob's user avatar
  • 2,781
3 votes
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OBD2 CAN Protocol: ISO 15765-4

There is no magic bullet. Generic OBDII is the only one that gives a predefined set of data. The manufacturer specific or "enhanced" data is entirely up to the manufacturer. This means there is no ...
vini_i's user avatar
  • 16k
3 votes

(Mandatory in the EU) CAN through OBD-II?

You asked I know that in the US, since 2008 vehicles must have a CAN connection on the OBD-II plug, but what about Europe? They have a special OBD called, wait for it, EOBD. Europe has their own ...
DucatiKiller's user avatar
  • 32.9k
2 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

I just had a problem using one of this OBD2 Bluethoot module on my Chevrolet Trax 2015, where my Traction Control System stop working (Engine and TCS dash lights came on), also the transmission wasn't ...
Anttony Crosbie's user avatar
2 votes

Can a vehicle be harmed with bad inputs via an OBD-2 port?

I recently purchased a 'ebay' obd2 dongle. Plugged it into my 06 Mercury mountaineer, to check a CEL code. I was using the Torque app. Drove with it for a few miles and the Wrench symbol came up ...
Ryan Roberts's user avatar
2 votes

Controlling door lock/unlock via CAN bus

I have been trying to find information on the same thing and the conclusions I arrived at are that it would be easier to repurpose an old/new key fob to do just that in combination with a BLE/WiFi ...
user3796148's user avatar
2 votes

How to simulate a vehicle CAN bus network?

It's a worthy endeavor, but I suspect any solution that you could buy would be far more expensive than salvaging the important computers from a wrecker [junkyard] and creating your own virtual "test ...
SteveRacer's user avatar
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2 votes
Accepted

How do I decode BMW CAN data (over OBDII)

I was able to get really good information from the legends over at /r/CarHacking. In that thread I asked basically the same question. Cyrix2k replied with: It's UDS, derived from KWP2000 which was a ...
Clam's user avatar
  • 41
2 votes

What is the maximum number of OBD2 PIDs I can reasonably retrieve at the same time?

I wouldn't worry. In most cases, your adapter is usually way slower than the CAN connection, so unless your OBD2-adapter has its own logic (which only a handful do), it's not possible to saturate the ...
DrMickeyLauer's user avatar
1 vote

Weird OBD2 error on newer Honda models

I would almost certainly say that it's a problem with the Freematics device rather than the Honda, even though manufactures are making it hard to analyse can bus messages through the OBD port they ...
Newbie Noob's user avatar
  • 2,781
1 vote

Calculating power consumption through OBD port

This question is incomplete. Generally, if the device is designed correctly, it will draw almost nothing unless the device is active even when the vehicle is not running, ie, the device should be able ...
JDubya's user avatar
  • 113
1 vote
Accepted

How to simulate a vehicle CAN bus network?

There are really two ways of achieving this. Wire up all of the required Nodes on the bench, for example this can be the Engine ECU, Instrument cluster, BCM, indicator stalk, rear convenience module ...
Newbie Noob's user avatar
  • 2,781
1 vote

Are OBD-II PID codes the same for all car manufacturers?

No, all pid’s are not created equal - there is a base standard that is the same for all manfacturers, But they are allowed to add their own as they wish. This means that Citroen may decide to split ...
Solar Mike's user avatar
  • 34.6k
1 vote

Are OBD-II PID codes the same for all car manufacturers?

Yes - they are standard, ie. engine RPM is always 0x0C. However not all PIDs are available in all cars. What is the raw value of your RPM PID?
filo's user avatar
  • 166
1 vote

Are there any affordable OEM scan tool options for DIY-ers?

If it has to be 'cheap' you do not want any proprietary hardware and software. So what you need is a basic ($15) USB or bluetooth enabled OBD-II scanner that can hook up to a laptop. The other thing ...
MadMarky's user avatar
  • 1,350
1 vote

Heavy Truck OBD2 diffrent from Car OBD2?

There are readers and readers - some readers will read many cars, some have to be tailored to specific makes (such as the one I had to get for my car). The professional readers have "character" cards ...
Solar Mike's user avatar
  • 34.6k
1 vote

What happens if I shortcut the CANBUS?

After some more digging I found some answers to that question. In order to summarize what I found on some other pages, I'll quote everything here. Here (Edaboard) I found following: CAN ...
Fusseldieb's user avatar
1 vote

How to establish if a car has CAN Bus?

Most European vehicles will have at least one CAN bus if it was manufactured after 2004. So find out specifically it requires experience and research of each manufacturer. For example I know off the ...
Newbie Noob's user avatar
  • 2,781

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