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Topic starter
Hello
I am using the torque app / GM PID 221940 for transmission fluid temperature.
Why does the formula have "-40" subtracted from A (A-40)?
This is common in the GM specific fluid temperature PIDS.
Thanks for any info.
Posted : 26/06/2020 10:20 pm
It is a standardized way of handling
readings below 0°C (32°F).
Posted : 26/06/2020 11:04 pm
Topic starter
Thanks.
Is A = ambient temperature?
Just trying to figure out the construction of the formula.
(or should I just accept that is how GM PIDS are written and stop overthinking?)
Posted : 26/06/2020 11:09 pm
Torque parses the hex response data into
variables A, B, etc.
Variable A represents the value of the first
data byte.
If you "test" the response in the pid editor,
while connected to your vehicle, the raw hex
response will be shown.
Posted : 27/06/2020 4:41 pm
Another - perhaps simpler - way of saying it is: It allows a single byte "A" to represent temperature readings from -40º to 215º INSTEAD of 0º to 255º.
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54371019
Posted : 29/06/2020 4:17 pm
