Scanner survey

I connected to the 06 again today, and here is a shot of all the systems supported at this time. Like I mentioned b4 they will have a new version very soon which he highly suggested getting.

 

Also visited the "HV ECU CAN" and selected these items to plot.

 

Thanks for providing these details, I'd like to buy that soon. I understand that it is necessary to order the basic unit plus the Toyota interface, total cost ~$400?

 

Here's a plot of just the MG1 & MG2 Torques.

 

Here's the most interesting one today, this was from a cold start, notice how the MG1's motor temp rises well above what MG2 is doing. Is this because MG2 has better cooling? It also indicates that both inverter circuit temps are well cooled. The 03 Prius is next.

 

You're very welcome Patrick. Yes it is the Proline hardware connector with ver 8.2 scantool software ($249), then also the Toyota Enhanced Interface option at $150. There is a wealth of useful information to be had about this car, and with this system you can be creative in how you plot things too. Only wish it could plot more than 4 things at a time, (I haven't figured out how to do that yet). Anyhow I think it's worth it especially for the GEN1 owners with weak batteries to monitor them. Better get used to it now and know what "normal" is, then when something happens you can compare.

 

Thanks Bob, very interesting indeed. And it makes sense that MG1 would get hotter in the beginning because it's right next to the ICE and also less air flow in the middle of the transaxle/engine. MG2 is towards the outside of the transaxle and therefore gets good air flow. Did you get your scantool yet? Tom

 

That's not why MG1 often gets hotter than MG2 during a cold start and warmup. The engine in the Prius produces less waste heat than a typical passenger car engine, and contributes little to MG1 temperatures.

You can find out why MG1 is heating up during this time by observing motor data, if you like.

 

That will be a problem if a module has four or more codes.

Almost all scanners utilize scrolling, including OEM scanners.

 

would it be because the engine is starting up requiring the MG1 to spin up to ~3600 rpm-3900 rpm to spin the engine to like ~ 1200 rpm?

im not sure if this belongs here, but maybe someone can shine some light on this. I have a USB CAN232 adapter that supports OBD2 and CAN interfaces, and all the protocols ( kwp2000,9141-2,14230 etc ) and the issue im having is getting it to be detected with autoenginuity and/or techstream

 

Not entirely; that takes less than a second. But MG1 continues to spin for during cold start and warmup for a variety of reasons, while MG2 is not doing much of anything. Basically, MG1 is usually working harder than MG2 during this time. That's really all there is to it.

Contact the cable manufacturers and see what they say.

 

Sure that's not 82º-90ºC?

If MG1 temperature was significantly affected by engine temperature, it would not fluctuate as much as it does during a typical drive cycle, which it does even though it's almost always spinning.

 

Also I would guess that because of all the above and the fact that MG1 almost immediately becomes a generator the first time you let up on the gas and coast or brake it is pumping a few amps into the battery pack as well. So the temp will rise from a cold start faster than MG2. Now the thing I want to see is what happens after driving a longtime, like maybe an hour. Have yet to do that. Now below I have a screenshot of all GEN1 systems covered...This one is an 03 Prius w/ low miles.

 

And here is a shot of the "High Block vs Low Block voltage" and two of the four battery temps on the 03 Prius under "BattECU" during a short ride across town. I am really interested in the low blk voltage sag just 1/3 way from the beginning. There seems to be a delta there of over 1V however the overall delta throughout trip is reasonable (.2-.4v). Maybe this large delta during a hard accel indicates a cell or two is weak. But the overall delta is relatively small so the system doesn't yet log a code?

 

Yes I am looking at the raw .csv file and the timestamp is around .3sec ticks between data samples. Here is one cycle of batt blocks 1-19 and the 4 batt temps at the end. The 10th value is blk max V, and the 11th is blk min V.

01:05:08.109, 15.18, 01:05:08.484, 15.19, 01:05:08.812, 15.16, 01:05:09.140, 15.12, 01:05:09.468, 15.15, 01:05:09.796, 15.15, 01:05:10.125, 15.15, 01:05:10.453, 15.22, 01:05:10.781, 15.19, 01:05:11.109, 15.28, 01:05:11.421, 15.12, 01:05:11.734, 15.15, 01:05:12.062, 15.20, 01:05:12.390, 15.17, 01:05:12.718, 15.28, 01:05:13.046, 15.14, 01:05:13.375, 15.15, 01:05:13.703, 15.11, 01:05:14.031, 15.14, 01:05:14.359, 15.17, 01:05:14.671, 46, 01:05:15.000, 48, 01:05:15.312, 48, 01:05:15.625, 46,

I don't have Excel on this compuker so can't plot them all at once yet.. The scantool software can only plot 4 at a time, as you can see from the screenshots. But it can capture in a .csv file many more. You can see just by this first string that the two middle batt temps are higher than the ends. Also judging from the time to make one string of data, it was updating ea. value every 7 seconds or so.