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AC cut off for TPSWOT
Posted: Sat Oct 21, 2017 12:49 pm
by jsdevel
Could I modify my ms2extra-3.4.2 firmware as follows to disable my AC output when TPSWOT is cleared?
if (outpc.rpm < flash12.ac_idleup_min_rpm || outpc.tps > flash4.TPSWOT) {
I'm thinking I could make that change in ms2_extra_idle.c.
Re: AC cut off for TPSWOT
Posted: Sat Oct 21, 2017 8:48 pm
by jsdevel
It worked! I was able to compile an updated version of the 3.4.2 firmware with this change and now my floodClear serves a dual purpose of closing fuel during cranking
and shutting off my AC compressor
Re: AC cut off for TPSWOT
Posted: Fri May 01, 2020 2:15 pm
by tryingbe
Great find!
Not sure why this didn't make into the official release.
Re: AC cut off for TPSWOT
Posted: Fri May 01, 2020 7:02 pm
by metcap
I think you can already do it in the stock firmware with Programmable outputs option in Tunerstudio, just set your output to turn ON or OFF when it hit the tps threshold and set hysteresis to maybe 5% so you prevent the output from hunting.
Re: AC cut off for TPSWOT
Posted: Thu May 21, 2020 10:25 am
by tryingbe
I'll be trying
Code: Select all
if (outpc.rpm > flash12.ac_idleup_min_rpm || outpc.tps > flash4.TPSWOT) {
Instead of
Code: Select all
if (outpc.rpm < flash12.ac_idleup_min_rpm || outpc.tps > flash4.TPSWOT) {
I want my a/c compressor to turn off when RPM is over preset rpm (3500rpm) instead of RPM is lower than preset rpm (600rpm) or when TPS is WOT.
metcap wrote:I think you can already do it in the stock firmware with Programmable outputs option in Tunerstudio, just set your output to turn ON or OFF when it hit the tps threshold and set hysteresis to maybe 5% so you prevent the output from hunting.
I was doing that before, but it's much nicer too have the feature of Compressor Delay Since Last On and Idle-up Delay (delay to turn on compressor.) So it doesn't fry my a/c compressor clutch when the condition of a/c compressor on/off is meet and not meet repeatedly.
Re: AC cut off for TPSWOT
Posted: Tue Jul 13, 2021 2:05 pm
by tryingbe
tryingbe wrote:I'll be trying
Code: Select all
if (outpc.rpm > flash12.ac_idleup_min_rpm || outpc.tps > flash4.TPSWOT) {
I want my a/c compressor to turn off when RPM is over preset rpm (3500rpm) instead of RPM is lower than preset rpm (600rpm) or when TPS is WOT.
Sorry it took so long for me to updated, I wanted to use the 3.4.4 code but I guess that code will not be released so I went back to 3.4.3 code.
This new code works. ADC6 is connected to my a/c cut out relay and as you can tell from the logs, a/c cut out relay is activated when RPM > 3500rpm or TPS is WOT.
- tps.jpg (431.23 KiB) Viewed 4533 times
- rpm.jpg (443.27 KiB) Viewed 4533 times