Coolant temp gauge
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
https://drive.google.com/file/d/1npu...gvg4r0mtg/view
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
The tech section has a colored wiring diagram with a coolant temperature sensor listed.
https://drive.google.com/file/d/1npu...gvg4r0mtg/view
https://drive.google.com/file/d/1npu...gvg4r0mtg/view
Tuned
Joined: Jun 2003
Posts: 465
Likes: 53
From: Connecticut
If the coolant sensor on this van is similar in function to the Excursion, it's crap (as I sarcastically noted above). All it does is send a basic signal to the "gauge" on the dash, which is, really, nothing more than an idiot light masquerding as a gauge. There is no coolant temp input into the PCM.
I was experiencing a significant problem with oil temps while towing that I could not track down, only to find later that I was actually experiencing a large swing in coolant temps, which affected the oil temps through its intercooler/exchanger. Through it all, the "coolant temp gauge" never waivered, despite probably having seen coolant temps exceeding 235.
I'm told that my PCM uses oil temps for engine parameters. I now monitor that as a guide for problems with either. - GA
I was experiencing a significant problem with oil temps while towing that I could not track down, only to find later that I was actually experiencing a large swing in coolant temps, which affected the oil temps through its intercooler/exchanger. Through it all, the "coolant temp gauge" never waivered, despite probably having seen coolant temps exceeding 235.
I'm told that my PCM uses oil temps for engine parameters. I now monitor that as a guide for problems with either. - GA
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Most likely. The diagram shows one lead coming from the coolant temp sensor and going to terminal 37 for manual transmission engines, but the same lead going to 37 in automatics from the ATF temperature sensor.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
I see the TFT feeds to pin 37 on the PCM like the MT coolant sensor does. Makes no sense for the PCM to decide engine fueling by reading the trans temps. So indirect. Oil temp is a good analog for coolant temp, but TFT? Pretty sure this is the same diagram Kwik has.
Cargo Master
Joined: Apr 2022
Posts: 3,192
Likes: 1,696
Dash gauge gets signal from the 10884 part I referenced above. That sensor fits into the water pump. That's only for the dash.
The PCM gets engine temp data separately. For AT trucks the data comes from an oil temp sensor (12A648) on the back of the HPOP reservoir. For MT trucks there is a sensor on the front cover near the CPS that reads coolant temp.
It is possible to select and view "ECT" on AT trucks with scanner, but the data is garbage. You must monitor EOT. But ECT monitored on MT trucks is the same as what the PCM sees.
Luckily Ford made it complicated so we could have this little chat.
The PCM gets engine temp data separately. For AT trucks the data comes from an oil temp sensor (12A648) on the back of the HPOP reservoir. For MT trucks there is a sensor on the front cover near the CPS that reads coolant temp.
It is possible to select and view "ECT" on AT trucks with scanner, but the data is garbage. You must monitor EOT. But ECT monitored on MT trucks is the same as what the PCM sees.
Luckily Ford made it complicated so we could have this little chat.
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,106
Likes: 4,714
From: Henderson, NV
My recollection is PCM uses oil temp on ATs, but since looking at the diagram I'm not sure.
I see the TFT feeds to pin 37 on the PCM like the MT coolant sensor does. Makes no sense for the PCM to decide engine fueling by reading the trans temps. So indirect. Oil temp is a good analog for coolant temp, but TFT? Pretty sure this is the same diagram Kwik has.
I see the TFT feeds to pin 37 on the PCM like the MT coolant sensor does. Makes no sense for the PCM to decide engine fueling by reading the trans temps. So indirect. Oil temp is a good analog for coolant temp, but TFT? Pretty sure this is the same diagram Kwik has.
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
Its possible the ford dealer near my work gave me the wrong one, didnt bother double checking im just tired of taking the damn intake off every time to do anything. Im so far behind on racing prep for the season with work I wanted it to be the last time for at least a few months.
Ill check the invoice tomorrow and find out.
Ill check the invoice tomorrow and find out.
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Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
As far as i know,3 tables for fueling.
Oil temp,air temp and altitude.
With kazillion extra tables for those.
TC won't lock up until certain TFT.
ECT and TFT has nothing to do with fueling,in ATs.
Manuals with ECT monitoring,don't know.
Oil temp,air temp and altitude.
With kazillion extra tables for those.
TC won't lock up until certain TFT.
ECT and TFT has nothing to do with fueling,in ATs.
Manuals with ECT monitoring,don't know.
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,106
Likes: 4,714
From: Henderson, NV
Ah yes I had forgotten you have messed with Minotaur before. Thank you!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
My recollection is PCM uses oil temp on ATs, but since looking at the diagram I'm not sure.
I see the TFT feeds to pin 37 on the PCM like the MT coolant sensor does. Makes no sense for the PCM to decide engine fueling by reading the trans temps. So indirect. Oil temp is a good analog for coolant temp, but TFT? Pretty sure this is the same diagram Kwik has.
I see the TFT feeds to pin 37 on the PCM like the MT coolant sensor does. Makes no sense for the PCM to decide engine fueling by reading the trans temps. So indirect. Oil temp is a good analog for coolant temp, but TFT? Pretty sure this is the same diagram Kwik has.
Google Drive link to the colorized one provided via the link in the Tech Section.
https://drive.google.com/file/d/1npu...gvg4r0mtg/view
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