Prius PID code hack suggestions

Hi all,

I am currently working on a Gen III Prius as part of a University project. The car is being used as a driving simulator and as such parts of the car have been removed (i.e. the batteries and the inverter). I've been tasked with making the speedometer display a value. Although I have found the PID, the speedometer is blank. As the batteries are missing, it's coming up with "check hybrid system". I'm assuming the car needs to go through a check sequence before the speedometer comes into life? Does anyone have any suggestions as to where to go at this point?

So far I've tried to clear the DTCs in the HV ECU, but this only briefly brings up the hybrid system logo.
My next thought was to send HV ECU ecu "all is well messages" through the canbus. But, I'm having trouble finding these codes.

I might be able to access a working Prius and log can bus messages as the vehicle starts up, which I could use to perhaps run the simulator Prius through the correct start up process and hopefully get the speedometer working.

Any suggestions would be more than welcome.

Thanks!

 

Thanks for the reply. To update and answer some questions. I've managed to get the speedometer up and running using a PID that was buried in the appendix of an article written by Chris Valasek and Charlie Miller. PID 036B, clears the "Check Hybrid System" display and brings up the speedometer, which can then be hacked. Still plenty to go, but it's a start.

I have also been in touch with Toyota NZ thanks to the lecturer in charge of the driving simulator, who is happy to give more insight into the Prius and the how the ECUs interact.
Another interesting finding is that the speedometer interacts heavily with the ECU that manages the stability control, ABS etc.

Although I have found several sources for PIDs, I'm having a little trouble figuring out how to interpret them as they do not match up to a lot of the data I am seeing on the can bus. For example, 01C4 is the ICE rpm data PID from Vasalek and Miller, but I've also seen 3C8 and 2C4 on other spreadsheets. Can anyone shed light on this? Have these been converted for use with other applications? If so I have searched, but I'm probably missing something with respect to conversion etc. Thanks for any help.

 

OK, I'm still having some trouble with PIDs, some of them appear to line up with what I'm seeing, on forums, but others are still a bit of mystery. I'm using CanDo OBD software from cananalyser UK

I've attached a static sample of the data I am seeing (this is from a Prius C powered on with the brake on). Some of the PIDs, such as ICE RPM, steering angle, and a few others I've managed to cross check with spreadsheets, but there are a bunch of codes I can't seem to cross check. As an example, codes 499, 49A and 49B are to do with ICE, but I have not seen these codes on any PID spreadsheets I have looked at. Also, some codes I would have expected to see (e.g. to do with the battery SOC etc) do not seem to be there. Am I missing something?
Thanks for any help.

 

Apologies, I have finally worked out why I'm having trouble. Most of the spreadsheets with IDs are related to specific software (e.g. torque or xgauge). I have worked out how to convert passive can IDs, but not others. Is there anyone who knows of a comprehensive list of generic PIDs for the Gen III Prius. Or information on how to convert xgauge IDs to generic types. Once again, any help would be much appreciated.

 

Hi again,

Thanks again for your reply. I've done a thorough search through PriusChat and have found some information, but most relates to scangauge or torque. However, we are making progress in determining the data coming off the can bus, but it's mostly hunches and the odd random find so far. Just got to keep picking away at it. Bit of blind luck always helps!