Door Status on CAN

Hi all,

I am currently working on a project for my Prius and I need to be able to know the door and window status over CAN. I have found the window status on message ID 0x638, data byte 4 (2 bits per window), but I can't seem to locate the door status. I have found a bit in message 0x626 that appears to indicate the status of either the dome light or the door indicator on the dash, however I would love to know the status of each door individually. Does anyone know if that is available or will I need to do more reverse engineering?

Thanks!
Erik

PS. ID 0x638 also appears to contain the lock status and hatch button state on bytes 2 and 6, if this is useful to anyone!

 

For the curious, here's how to decode the door lock and window status:

Code:

def windowStatus(data, window):
    status = (data >> (2 * window)) & 0x03
    if status == 1:
        return "Fully Open"
    if status == 2:
        return "Closed"
    if status == 3:
        return "Partially Open"
    return "N/A"

Code:

if msg.arbitration_id == 0x638:
    if msg.data[1] & 0x80:
        print("Driver Door:       " + ("Unlocked" if msg.data[2] & 0x10 else "Locked"))
        print("Passenger Door:    " + ("Unlocked" if msg.data[2] & 0x08 else "Locked"))
        print("Rear Doors:        " + ("Unlocked" if msg.data[2] & 0x06 else "Locked"))
        print("Hatch:             " + ("Unlocked" if msg.data[2] & 0x01 else "Locked"))
        print("Hatch Button:      " + ("Pressed" if msg.data[6] & 0x40 else "Released"))
        print("Driver Window:     " + windowStatus(msg.data[4], 3))
        print("Passenger Window:  " + windowStatus(msg.data[4], 2))
        print("Right Rear Window: " + windowStatus(msg.data[4], 1))
        print("Left Rear Window:  " + windowStatus(msg.data[4], 0))

 

Hi @taxibuddy - unfortunately, the two rear doors appear to be connected in a "logical-AND" configuration - if either is unlocked, the status bits show 'unlocked' for both. I am expecting the same for the 'door-open' status, as there is only 1 wire going to the ECU for both rear doors in the wiring diagram.

 

@RobH: The wiring diagram shows that there are inputs for the following "courtesy switches":
- Front Left
- Front Right
- Rear (both in parallel)
- Hatch
- Hood

I think it should be possible, therefore, to read these on the CAN bus...

 

Got it! It was sharing the same message as the parking brake, which I had already filtered out and is why I couldn't find it...
For future reference:

Code:

if msg.arbitration_id == 0x620:
    if msg.data[1] & 0x80:
        print("Driver Door:       " + ("Open" if msg.data[5] & 0x20 else "Closed"))
        print("Passenger Door:    " + ("Open" if msg.data[5] & 0x10 else "Closed"))
        print("Rear Doors:        " + ("Open" if msg.data[5] & 0x0c else "Closed"))
        print("Hatch:             " + ("Open" if msg.data[5] & 0x02 else "Closed"))
        print("Parking Brake:     " + ("On" if msg.data[7] & 0x10 else "Off"))

Still no sign of the hood status (even on that message), but I don't need that anyway.