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Thread: Commands to control car!

  1. #11
    Constant Bitrate txspazz's Avatar
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    Clifford’s http://www.clifford.com/ G4 and G5 AvantGuard series alarms can control everything you are looking for using a serial connection. Not sure if that is what you are wanting or not wanting when you say you can't use external modules.

    To answer your original question, my experience is limited to Fords, but using there hand held diagnostic scanner (NGS) you can control many of the types of things you are wanting (things controlled by the BCM and some things controlled by the PCM). This isn't using OBD protocol, but does use the same port.

  2. #12
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    The simple answer is you need to connect to the vehicle's CAN network. But not all vehicles are the same. And many of them have more than one CAN network. So depending on the car and the things you want to control, the hardware and software will be different.

    Nearly all vehicle that support CAN networks, support what is called ISO 11898 this is the dual wire high speed can on the OBDII port pins 6 and 14. To connect to this network you need a hardware interface that supports MORE than diagnostics. So these ELM and ELM-like devices will not do. You need a device like the Mongoose or the ValueCAN (google them for more info). These device support real-time monitoring of ECU to ECU traffic (not the same as diagnostics). The ValueCAN can connect to this network but you'll also need software, at the same site you should find a downloads section then there is a software application called CANcracker (or something like that). This is a free application that helps to reverse-engineer the CAN network.

    But be aware that many vehicles don't use the network on PIN 6 and 14 but some on PINs 3 and 11 or PINs 1 and 8 or in the case of GM vehicles PIN 1 has a single wire CAN which is different and doesn't work with the ValueCAN.... I'm not sure about the Mongoose.

    It takes a lot of patience but it can be done.

    Oh and one more thing the vehicle has to support controlling things via the CAN bus .. just because you connect to it, doesn't mean that you can control it via the network.

    Good luck

  3. #13
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    The ELM is still capable of doing most of what the Mongoose can do - just not as fast, without as much control over the frame formatting and timing, and only one protocol at a time. But I have certainly been able to do some programming of non PCM modules without problems on an ELM. But sniffing at full CAN bitrate is another problem altogether.

    (a) There are no standards to do what you suggest. The only standards that manufacturers conform to are J1979 and in some cases J2190. These can only do read operations from the PCM for Emissions.

    (b) Some cars can do what you require, and some cannot. Each implementation is different, prioprietary, and not public knowledge. The kinds of things that are configurable or programmable across the Bus are there so that Technicians can use Manufacturer tools to adjust these values in the workshop.

    You can get Manuafacturer specific stuff if you are a member of ETI. But it's not cheap. Another option you have is to license Prioritary codes from the manufacturers if you plan to sell a software tool.

    One path I have followed is to access a manufacturer diagnostic tool, and use tools like the ELM or Mongoose to 'sniff' the traffic between the car and the diagnostic tool as various different tasks are performed. This is very easy on the CAN bus using an OBD2 'Y' Cable. But it takes a lot of time and dedication to get what you want - and access to the tool in the first place. Suffice to say that manufacturer workshops won't just let you walk in off the street and let you do this.

    If it were easy and cheap, there'd be lots of easy cheap software tools out there by now. The only easy cheap stuff out there is pretty much just J1979. Anything beyond that is the reason why these tools cost so much money.


    Lukeyson

  4. #14
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    First off im sorry to bring back a thread as old as this one,but its the cloest description i have been able to find.

    I want to be able to do as the original poster has stated but am open to all ideas but it needs to have a serial, usb, or Bluetooth interface. I mainly want to be able to control the door locks of my cars.

    Any help will be grateful!
    Thanks,

  5. #15
    FLAC PhilG's Avatar
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    I am using Auto Enginuity software/OBD tool for my ford truck and it has bi-communication capability, ex: I can buzz test injectors on command, control certain solenoids for testing purposes etc. Maybe it would be a good starting platform, I don't know. Then of course as mentioned above the alarm companies have modules for various vehicles and modules to lock unlock doors etc. I believe DEI even has an Iphone app to control start/lock/alarm features. So there may be more than one way to "skin this cat."
    My 2007 Ford F350 Work Log located HERE

  6. #16
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    Quote Originally Posted by PhilG View Post
    I am using Auto Enginuity software/OBD tool for my ford truck and it has bi-communication capability, ex: I can buzz test injectors on command, control certain solenoids for testing purposes etc. Maybe it would be a good starting platform, I don't know. Then of course as mentioned above the alarm companies have modules for various vehicles and modules to lock unlock doors etc. I believe DEI even has an Iphone app to control start/lock/alarm features. So there may be more than one way to "skin this cat."
    thank you for the quick reply I'll look into that software!

  7. #17
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    Quote Originally Posted by rcicu View Post
    thank you for the quick reply I'll look into that software!


    As asked of the origonal poster, what year/make/model/country is your vehicle? Some CAN vehicles have that capability, for instance, on some GM vehicles you can lock/unlock and remote start the car via GMLAN single wire CAN.
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  8. #18
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    Both of my cars are US one its a 2009 Honda civic and the other is a 2012 Subaru Impreza

    Thanks

  9. #19
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    Hi , The Honda >=2006 has a central body ECU.
    Through this ECU you can send "commands" and activate several components ,
    like lock - unlock doors , activate horn , wipers and many more.

    To connect to the ECU you must be able to initiate a custom KWP2000 communication.

  10. #20
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    Quote Originally Posted by rcicu View Post
    Both of my cars are US one its a 2009 Honda civic and the other is a 2012 Subaru Impreza

    Thanks
    Hi , The Honda >=2006 has a central body ECU.
    Through this ECU you can send "commands" and activate several components ,
    like lock - unlock doors , activate horn , wipers and many more.

    To connect to the ECU you must be able to initiate a custom KWP2000 communication.

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