I'm using an OBDLink LX OBD adapter and the Torque app. The app has 3 monitors for transmission temp, but I don't think they are correct. One does nothing and the other two mirror the coolant temp reading. Does anyone know the PID Volvo uses for transmission fluid temp, or is it even possible to measure it without using VIDA/DICE? I'm hoping there is a somewhat easy way to do this, but my gut tells me there isn't.
Transmission Fluid Temperature
gtsxr
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I'm using an OBDLink LX OBD adapter and the Torque app. The app has 3 monitors for transmission temp, but I don't think they are correct. One does nothing and the other two mirror the coolant temp reading. Does anyone know the PID Volvo uses for transmission fluid temp, or is it even possible to measure it without using VIDA/DICE? I'm hoping there is a somewhat easy way to do this, but my gut tells me there isn't.
There might be some pro tools that can do this with a Volvo-specific sw load, but it'll be expensive. Generic tools won't even query the TCM, much less read a proprietary Volvo PID. I'm sure it's possible though.
Why do you want to read this particular value? Maybe you can put a thermometer on the output cooling line.
Why do you want to read this particular value? Maybe you can put a thermometer on the output cooling line.
A couple of guys have taken their Polestar's to the track and reported getting into a "limp-mode" where the transmission forces shifts at 5500 rpms. I'm assuming this is because the fluid is getting too hot. I'm probably going to install an auxiliary fluid cooler before I take mine to the track, but I'd like to get a live temp reading to monitor it just to be safe. I'm already using torque pro to monitor a few other things. It would be nice if it could do this as well. It has the ability to read custom PIDs, I would just need to know the number, then probably have to do some math to get it to show up as a temp reading.
My current rental SEAT Leon turbo something or other with both water and engine oil temperature readouts read pretty close to each other in normal driving. I attribute this to the water-over-oil engine oil heat exchanger, one that's very similar to the ATF cooler (and engine oil too for that matter) on my XC60. Based on this I wouldn't be surprised if your ATF readings are real.
i had this happen to me . it went in to limp mode on my last lap . i cleared the codes after letting it cool down and drove 5 hours home with out any problems.
Check this in torqueapp:
- Custom PID -> new
- PID: 221e3f
- full Name: as you choose
- shortname: Temp A/T
- min: -40
- max: 200
- multiplier: x1
- Celsius
- formula: B
- Header: 7E1
Sent from Taptalk
I've tried method 1 and it seems to just mirror the coolant temp. I just tied the custom PID above and it returns a number I'm more inclined to believe. I'm going to monitor both of them just to be safe.
Sent from my ONE A2005 using Tapatalk
Sent from my ONE A2005 using Tapatalk
A good test would be to start the vehicle cold and just leave it in park. The engine coolant temp will rise but the transmission fluid temp shouldn't really go up hardly at all.
That's one I've found to be the case. The transmission temp starts at or a bit above the ambient air temp, then rises slowly. The coolant temp usually starts a little higher and quickly gets up to 185-200F and moves between those two numbers. Using the custom PID above, I've seen tranny temp as high as 190F, but it takes a lot longer to get there.
That's perfectly consistent. The transmission is "cooled" by piping its fluid through the radiator, so steady-state the two should be roughly the same. When cold and the trans in Park, the radiator will rise faster. Sounds like you have the right pid.
I tried this today with Torque on my S80 V8 (TF80-SC), didn't work at all - just read 0C and never changed.
stealed this instruction in our forum... Maybe different address for data?Sent from Tapatalk
It works fine for me. The only thing I entered differently than what is above is the shortname and I just put C for the units, although they show up as F on the display due to my preferences in the general settings for units.
Maybe it's only supported on newer models? I'll try it on our '11 XC70 T6 sometime...
It is the same P3/EUCD platform, but the TCM software I'm sure is different and probably does have different non-standard PIDs.
None of this is "standard". The code is basically a raw CAN frame, it is very unlikely to translate from car to car. You'll need to spend some time with a CAN sniffer to figure it out on the S80/TF80-SC.
After speaking with a Tech Rep from Aisin on this very question: you are correct. You want to put the temperature sensor in the output line of the transmission which is the lower of the two oil lines on the transmission. This is because you want to know the temperature of the oil leaving the sump.
Wondering how I can do this with my ScanGauge II tool on my P2 S60... Custom PIDs can be programmed to read out. Would the Torque app entry be similar, or is that tool dependant?
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Sent from my MHA-L29 using Tapatalk
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