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Help with TorquePro transmission temp PIDs

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39K views 42 replies 12 participants last post by  ashish2902  
#1 ·
I've got a 2009 Rav4 Sport 2GR-FE V6 with the U151F AWD transmission. I've used TorquePro in the past with my two prior Prius but this is the first time trying to locate custom PIDs for the Rav4.

Through googling I've gathered that the PID for transmission temperature is not built in to default PIDs and it has to be created. The only help I could find on Toyotas were from older Rav4s and a few Tacoma and Highlander forums.

For creating the PID all of them had pretty much the same values but none seem to be accurate - here is what i tried so far...

1) For pre 2010 models
21D9
Long Name: whatever you want
Short Name: whatever you want
Min Value: 0
Max Value: 300
Scale factor: 1
Unit type: °F (different formula for °C)
((((E*256)+F)*(7/100)-400)/10)

OBD header to use: (left blank)
2) For 2010 and newer
2182
Long Name: whatever you want
Short Name: whatever you want
Min Value: 0
Max Value: 300
Scale factor: 1
Unit type: °F (different formula for °C)
((((A*256)+B)*(7/100)-400)/10)
OBD header to use: (left blank)

#1 provides an erratic output that jumps all over the place. #2 temperature seems to low (others have said roughly 50 degrees above ambient temp is typical.

Has anyone done this on the same gen and year Rav4 as mine and what did they do to get it to work?

Thanks!

Sent from my SM-G870W using Tapatalk
 
#3 ·
Great! Thx!! Looking at adding an aftermarket transmission cooler now that I’m running higher RPMs with my R9KTuned ECU.

Looking to add one based off the Highlander setup.

Image


Vs the RAV4 setup looks like it would be an easy add-on.

Image
 
N
#4 ·
Tek, I may have spoken too soon about being able to find that PID. I've looked at the app in my phone, but I can't find the PID settings I'm using. Sounds like we found the same threads in our searches. Have you seen this one?
Getting Transmission Fluid Temp using Torque Pro for Android - Toyota Nation Forum : Toyota Car and Truck Forums

I'm going on memory here, but I think this is the one I used. I'm irked with myself because I was sure I had saved those values somewhere, but today they are nowhere to be found on my computer or in my Rav file.

This past summer my ATF temps were running about 190-200F during freeway driving and not towing. I haven't tested yet while towing. The ATF and engine coolant were both close to ambient after a night in the garage.
 
#6 ·
Yeah, this first one works fine on my 2008:

If you are using the Torque app for monitoring transmission temp:


For pre 2010 cars (all equations copied from the thread at the Torque forum)


In Torque enter:


OBD2 Mode and PID:
21d9
Long Name:
Transmission Fluid Temperature 1 (or what you like)
Short Name:
Trans 1
Minimum Value:
0.0
Maximum value:
300.0
Scale factor:
x1
Unit Type:
°F (or alternatively C is you use the second equation below)


Equation:
((((E*256)+F) * (7/100) - 400)/10) - for output in F




or alternatively




(((((E*256)+F) * (7/100) - 400)/10) - 32) * (5/9) - for output in C




OBD Header to use:
left blank


For 2010+ cars (do not own one, so I have not tested this)


OBD2 Mode and PID:
2182 (NOTE DIFFERENT PID for newer Toyotas)
Long Name:
Transmission Fluid Temperature 1
Short Name:
Trans 1
Minimum Value:
0.0
Maximum value:
300.0
Scale factor:
x1
Unit Type:
°F
Equation:
((((A*256)+B) * (7/100) - 400)/10)




you can also convert this equation to C as above






OBD Header to use:
left blank
 
#13 · (Edited)
JuneBug said:
For 2010+ cars (do not own one, so I have not tested this)


OBD2 Mode and PID:
2182 (NOTE DIFFERENT PID for newer Toyotas)
Long Name:
Transmission Fluid Temperature 1
Short Name:
Trans 1
Minimum Value:
0.0
Maximum value:
300.0
Scale factor:
x1
Unit Type:
°F
Equation:
((((A*256)+B) * (7/100) - 400)/10)

you can also convert this equation to C as above

OBD Header to use:
left blank
Click to expand...
Thank you, I could not find this for 2010+ models anywhere else, only the pre-2010.
I inputted the formula and it seems to be working on my 2011.
The Torque indicated transmission temperature was climbing steadily while I drove in my neighborhood, up to 145 deg F. While idling, I measured with a IR/laser gun the temperature of the upper transmission hose that goes to transmission (outlet of transmission) and it indicated 155 F. Makes sense that the outlet of the cooler, that drains into the transmission pan, to be lower by a few degrees. I will test it on highway more. It's already hot outside.

Later I checked the formula against Techstream. Techstream transmission temperature was showing 158.5F. Yanked the adapter out, plugged in the Torque adapter (BAFX) and the PID formula for 2010+ reading was 160.5F. I would say that's darn close.



As a side note, with the hood open, and both cooler fans spinning fast (AC engaged), I noticed that a huge amount of heat is blasted straight into the battery. I measured 145 F on it's face... I wonder if I can do something about that.
 
#10 ·
The pre - 2010 PID (top TransTemp) bounces around with RPM. The post - 2010 PID (bottom TransTemp) appears to be working.

Does the bottom temp look correct with the ambient temperature?

Image
Image



Image
 
O
#11 ·
sounds about right. on mine it will get to about 150-160F after about 20-30minutes with an ambient of around 70F, but I have the stock cooler and aftermarket.

goes up to 225F when towing, imagine without the extra cooling
 
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#14 ·
TEKSMRT said:
I've got a 2009 Rav4 Sport 2GR-FE V6 with the U151F AWD transmission. I've used TorquePro in the past with my two prior Prius but this is the first time trying to locate custom PIDs for the Rav4.

Through googling I've gathered that the PID for transmission temperature is not built in to default PIDs and it has to be created. The only help I could find on Toyotas were from older Rav4s and a few Tacoma and Highlander forums.

For creating the PID all of them had pretty much the same values but none seem to be accurate - here is what i tried so far...

1) For pre 2010 models
21D9
Long Name: whatever you want
Short Name: whatever you want
Min Value: 0
Max Value: 300
Scale factor: 1
Unit type: °F (different formula for °C)
((((E*256)+F)*(7/100)-400)/10)

OBD header to use: (left blank)
2) For 2010 and newer
2182
Long Name: whatever you want
Short Name: whatever you want
Min Value: 0
Max Value: 300
Scale factor: 1
Unit type: °F (different formula for °C)
((((A*256)+B)*(7/100)-400)/10)
OBD header to use: (left blank)

#1 provides an erratic output that jumps all over the place. #2 temperature seems to low (others have said roughly 50 degrees above ambient temp is typical.

Has anyone done this on the same gen and year Rav4 as mine and what did they do to get it to work?

Thanks!

Sent from my SM-G870W using Tapatalk
Click to expand...
I have a 2016 Toyota Rav4. I used TorquePro but couldn't get transmission fluid temperature. I used on add on for TorquePro called Advanced EX for Toyota. Now I'm getting readings.
 
#15 · (Edited)
robert65 said:
I have a 2016 Toyota Rav4. I used TorquePro but couldn't get transmission fluid temperature. I used on add on for TorquePro called Advanced EX for Toyota. Now I'm getting readings.
Click to expand...
Does it really show injector duty cycle??

I'd love to have the additional sensor information. I've already added ATF temp with the custom PID mentioned earlier but I'd pay $6 for the extra PIDs.

  • AT Damper Clutch Lockup (*)
  • AT Current Gear (*)
  • VVT Oil Temperature (*)
  • Fuel Injector Pulse Width / Duty Cycle
  • Knock Feedback / Adjustments
  • Catalyst Temperatures
 
#17 · (Edited)
#22 ·
I was discussing on TorquePro group about the "known" custom PID that can help determine transmission fluid temps in units of Fahrenheit and it was identified by another that the formula that I've been using is over complicated.

((((A*256)+B)*(7/100)-400)/10)

When really a shorter formula works quicker.

(A-40)*1.8+32

When I run a test on both formulas within the TP app, you can see what the app has to do to solve the equation for both.

Image


I'm all for the "KISS" or "Keep it simple stupid" method so I'll be using this going forward. 😁

Image
 
#23 · (Edited)
If you can "live" with that simplified error, that great!
My S22+ just shrugs off those calculations :ROFLMAO:

PS: That "simplified" formula is not simple enough. Tell those guys that don't know basic arithmetic:
(A-40)*1.8+32 = A*1.8-40*1.8+32 = A*1.8-72+32 = A*1.8-40
 
#25 ·
SoNic67 said:
If you can "live" with that simplified error, that great!
My S22+ just shrugs off those calculations [emoji23]

PS: That "simplified" formula is not simple enough. Tell those guys that don't know basic arithmetic:
(A-40)*1.8+32 = A*1.8-40*1.8+32 = A*1.8-72+32 = A*1.8-40
Click to expand...
Well shoot, guess call me stupid I guess! [emoji1787]

Have you tested that formula in TP yet?
 
#26 ·
I didn't tested it. The calculation is done by the Torque itself and that relies on the phone's CPU. Pooling the sensors probably takes more time than the calculation. I have an OBDII that can read Toyota's CANBUS at 500kbps, that's faster than normal OBDII protocols.

I wish I would find a document that says what the actual formula needs to be....
 
#35 · (Edited)
I am not sure if that's the correct formula. It "works" for that register value (A=111), but I can't tell if that's the exact value of the temperature. If the number it was 32 it would make sense, because 0 in C is 32 in F. The 40 seems to be random.

I wish it was something else besides trial and error.
 
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