messing with CAN Bus data

No it's not possible to change any of those values. Unless you would reprogram the entire control unit.

Battery Ecu calculates those values from data it gets from hybrid battery so they change all the time.

One thing that has been done is to send messages to hybrid vehicle control unit through CAN that appear to be from Battery Ecu. That way you can effect how hybrid system works.

 

I wouldn’t assume that the Data List values, as you’d see in a Toyota Techstream diagnostic system, can be changed. The fact that an ECU has been programmed to respond to, say, a Mode $21 request to read diagnostic data (see the SAE J2190 standard) doesn’t imply that the ECU has also been programmed to recognize any CAN message that would alter those data.

If you’re curious about the battery ECU, you might find the following pages of interest:

Landspeed's HV battery + ECU teardown, analysis, experiment, upgrade thread | PriusChat

Prius PHEV TechInfo - My wiki

 

You're saying the Discharge Control Limit was 100kw and your Charge Control Limit was 20kw? Where did you read that? Using what device?

I try not to ever say something is impossible, but that 100kw number is making me want to....

In regard to the larger battery pack from a HyHy...how much experience do you have with working on a Prius HV system? Is this type of modification something you have experience in?

I couldn't even begin to guess what problems you would run into trying to shoehorn a HyHy HV battery into a Prius. There is just so much that's different, physically and electrically.

 

Kind of what I was thinking....if you're going to try to become familiar with a Prius, and especially if you want to experiment, you had better get techstream. Otherwise you're spitting into the wind. I find it very hard to believe any Gen 2 Prius, ever, has had a 100kw Discharge Control Limit.

 

not worth the trouble. many have tried, few have succeeded

 

couldn't agree more. all the best, and please keep us posted!

 

The price of the Prius isn't going to be the problem.....

Is the Prius inverter and DC/DC converter rated for the Hylander battery?

Can you just use a Highlander inverter? What mods would be needed to physically install it? What about electronic communication and operation?

Are the Highlander/rx400 HV battery electronics going to be compatible with the Prius systems?

Does the Highlander/rx400 even have the same type ECU in the HV battery that the Prius has? I don't seem to remember there being one, so how would it even begin to communicate?

There's going to be a bit of fabrication work to get the case to mount. You'll end up eliminating either the rear seat or part of the trunk, depending on mounting position/location.

Doesn't the AC unit have it's own inverter? Is it compatible with the higher voltage?

It's a heck of a project. A lot more than just a battery swap. Sometimes, the only way to find out if something can be done is to jump right in and see what happens.

I wonder how that fuel tank swap is going for the other guy? Wasn't he trying to install a Camry fuel tank or something into a Gen 2? I seem to remember him saying it was easy/squeezy or something. Haven't heard anything on that in a long time...I'd be interested in reading an update on that.

Corolla to Prius gas tank swap | PriusChat

Guess he reached the October cutoff date and had to surrender for a while since he was moving to Oregon. Hopefully, once he gets situated, we'll get an update. Don't they have vehicle inspections in that area? Going to be a tough sell with a bunch of emission system CELs.

From the Oregon DMV website for all cars being newly registered in the state:

Oregon DEQ Vehicle Test Methods
Tailpipe emissions test
(1995 and older model years)
At a Clean Air Station, a DEQ inspector places a probe into the vehicle’s tailpipe to ensure vehicle emissions are not exceeding standards.
On-board diagnostics test
(1996 through current model years)
The vast majority of vehicles receive this test. At a Clean Air Station, a DEQ inspector uses a plug-in cable to transmit data between the vehicle’s on-board diagnostics (OBD) computer and DEQ’s computer to ensure that pollution control equipment is working properly.

 

sometimes, they just disappear into oblivion, rather than come back with their tail between their legs...

 

The first to try something may not find the answer here.