Recent content by itstallion

  1. I

    Hacking an Equinox electric power steering ( EPS ) unit

    You could go out and grab all those modules and then you would probably have to grab all the sensors that those modules are looking for to get them all to play ball. I circumvented all that by generating enough of the messages on the CAN network for the EPSU controller to come on line. It's a...
  2. I

    Hacking an Equinox electric power steering ( EPS ) unit

    I initially attempted an insulating circuit design between the Arduino and the bus using transistors but was unsuccessful. I then hooked the Arduino pins directly to the J1850 bus (purple wire) after referring to the sae_j1850.pdf the dc parameters basically specify a TTL voltage range of 5v so...
  3. I

    Hacking an Equinox electric power steering ( EPS ) unit

    Here's a copy of my code that I'm running on my nano for this project. It waits for certain messages/requests and then sends the appropriate response. I'm using 3 pins on my arduino. One pin for sending data (8), one pin for receiving data (9) and one pin for monitoring the bus and triggering...
  4. I

    Hacking an Equinox electric power steering ( EPS ) unit

    The Arduino is very powerful. My first project with the Arduino was a controller for my power windows. It would monitor the current to each motor for an all down/up function via remote. I also had a touchscreen to operate each window but ultimately decided a touch screen to operate the...
  5. I

    Hacking an Equinox electric power steering ( EPS ) unit

    That would be possible as long as the data PID is defined by J2178 for said sensor/s. You would also have to use a data PID not in use as an existing module on the bus would be sending conflicting answers. My arduino is basically mimicking the ECU and sending speed/engine status messages so...
  6. I

    Hacking an Equinox electric power steering ( EPS ) unit

    Hi, My plan originally was to install the EPS in line with the existing linkage in the engine compartment. After acquiring one it was apparent it's not weather proof. So now the plan is to modify the 70's GM van tilt column that I have in the car right now. Bringing it inside is where it was...
  7. I

    Hacking an Equinox electric power steering ( EPS ) unit

    Hello everyone, So let me start by saying I stumbled across your forum while searching the internet for any information regarding GM class 2 data network over J1850 bus. You see the rabbit hole I voluntarily threw myself down brought me here. I've victoriously resurfaced and I'm here to share...

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