follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Software Tuning

Software Tuning Discuss all software tuning topics.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-13-2015, 01:19 AM   #1
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,863
Thanks: 1,808
Thanked 790 Times in 611 Posts
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Where is the ambient temperature sensor located?

The ambient temp sensor seems to be very inconsistent, if not inaccurate all together. Where is the sensor located? Maybe it needs some heat shielding or relocated where it can pick up accurate temps.
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
Old 10-13-2015, 02:24 AM   #2
CSG Mike
 
CSG Mike's Avatar
 
Join Date: Jul 2012
Drives: S2000 CR
Location: Orange County
Posts: 14,535
Thanks: 8,927
Thanked 14,181 Times in 6,837 Posts
Mentioned: 966 Post(s)
Tagged: 14 Thread(s)
Passenger side, in front of the AC condenser. It has its own bracket, and the harness is tied to the front horn.

It'll read accurate in free-flowing air; it'll read high when you have a hot parked car.
CSG Mike is offline   Reply With Quote
The Following 3 Users Say Thank You to CSG Mike For This Useful Post:
DAEMANO (10-13-2015), FRSBRZGT86FAN (10-13-2015), solidONE (10-13-2015)
Old 10-13-2015, 02:50 AM   #3
FRSBRZGT86FAN
Senior Member
 
FRSBRZGT86FAN's Avatar
 
Join Date: Jun 2013
Drives: 2023 GR SUPRA,15 FR-S (SOLD)
Location: Philadelphia, PA
Posts: 4,235
Thanks: 3,086
Thanked 2,100 Times in 1,397 Posts
Mentioned: 31 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by solidONE View Post
The ambient temp sensor seems to be very inconsistent, if not inaccurate all together. Where is the sensor located? Maybe it needs some heat shielding or relocated where it can pick up accurate temps.
A lot of vehicles, not just the FR-S, have this problem. First off air needs to be flowing for a few minutes through for it to get an accurate temperature reading (it's connected to a clip on the condenser) and looks like this and has a part number of SU003A0022:


Also it's inconsistent but a lot of variables play into it like:
What temperatures are you comparing it too? A weather app on your phone or an actual thermometer off the ground? In either case those temps aren't measured in the exact location and also aren't the same height over asphalt in an area with little airflow like inside a car. Also color of the car has a lot to do with the temperature readings as well if the car has been sitting.

If you're really annoyed by the temps in toyota techstream there's an ambient temp sensor offset you can set as well. Honestly I don't find it a big deal though it needs to be driven around a bit to get a correct temp
__________________
*SOLD*OFT Stage 2 UEL E85/Nameless Performance 3 inch axleback with 5 inch mufflers/ TRD CAI / CNT UEL/ Cusco Strut BAR & LHD Brake Stop / "JDM" Toyota Badges / WinJet JDM headlights - DRL MOD from fteightysix.com - 5000K Diode Dynamics HID kit / Diode Dynamics LED interior Lights and sidemarker bulbs / JDM Clear Sidemarkers / Diode Dynamics LED switchbacks/ OLM LED rear turn signals / Tap Turn Relay*SOLD*
FRSBRZGT86FAN is offline   Reply With Quote
The Following 2 Users Say Thank You to FRSBRZGT86FAN For This Useful Post:
solidONE (10-13-2015), soundman98 (08-12-2023)
Old 10-13-2015, 08:15 PM   #4
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,863
Thanks: 1,808
Thanked 790 Times in 611 Posts
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
I went ahead and measured the temperature of the components around and touching the temp sensor after having warmed up the car and driven for about 10 minutes. Ambient temperatures were at around 90-92. The mounting bracket was 110 degrees and the AC condenser was about 105 degrees few seconds after having stopped the car. Not a huge difference, but I'd think if it were mounted on the plastic shroud just a few inches ahead of where it's siting now it would read more accurately. Or at the very at least not take so long to get the air temps coming through the grill opening.

I've been keeping a close eye on the ambient and intake temps after having changed up some hardware on the car, in case you guys are wondering why im being so anal about the accuracy. I suppose ideally the ambient temp sensor would be mounted right next to the intake snorkel opening.
__________________
Intent > Content

cowardice is the mother of cruelty.

Last edited by solidONE; 10-13-2015 at 08:50 PM.
solidONE is offline   Reply With Quote
Old 10-17-2015, 06:50 PM   #5
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,863
Thanks: 1,808
Thanked 790 Times in 611 Posts
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
The ambient temp sensor is definitely affected by heat-soak. It will read a few degrees hotter after you've brought engine temps up and past normal operating temps regardless how fast you are moving.

I'm thinking about relocating it to where the horn is mounted ahead of where it's at now using a aluminum bracket instead of the steel one it currently is attached to.
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
Old 11-16-2017, 01:36 PM   #6
Hags86
Senior Member
 
Join Date: Mar 2013
Drives: Toyota GTS 86
Location: Melbourne Australia
Posts: 243
Thanks: 21
Thanked 118 Times in 65 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Does anyone have the calibration data for this sensor? It is originally wired to the dash but I’ve got an aftermarket dash and have wired this to the Motec ECU and would like to still read outside temp data.
Hags86 is offline   Reply With Quote
Old 11-18-2017, 10:50 PM   #7
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,863
Thanks: 1,808
Thanked 790 Times in 611 Posts
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Hags86 View Post
Does anyone have the calibration data for this sensor? It is originally wired to the dash but I’ve got an aftermarket dash and have wired this to the Motec ECU and would like to still read outside temp data.
In romraider


__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
The Following User Says Thank You to solidONE For This Useful Post:
Hags86 (11-19-2017)
Old 11-19-2017, 05:35 PM   #8
Hags86
Senior Member
 
Join Date: Mar 2013
Drives: Toyota GTS 86
Location: Melbourne Australia
Posts: 243
Thanks: 21
Thanked 118 Times in 65 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Thanks. I assume these voltages are with 5V source and a 1k Ohm pullup resistor?
Hags86 is offline   Reply With Quote
Old 11-20-2017, 01:57 AM   #9
solidONE
Senior Member
 
solidONE's Avatar
 
Join Date: Dec 2012
Drives: FR-S Whiteout
Location: California
Posts: 2,863
Thanks: 1,808
Thanked 790 Times in 611 Posts
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Hags86 View Post
Thanks. I assume these voltages are with 5V source and a 1k Ohm pullup resistor?
sounds about right, but
__________________
Intent > Content

cowardice is the mother of cruelty.
solidONE is offline   Reply With Quote
Old 08-10-2023, 12:53 AM   #10
dynarun55
Member
 
Join Date: May 2017
Drives: 2015 midnight blue limited edition.
Location: Charlotte,NC
Posts: 84
Thanks: 4
Thanked 13 Times in 12 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by solidONE View Post
The ambient temp sensor is definitely affected by heat-soak. It will read a few degrees hotter after you've brought engine temps up and past normal operating temps regardless how fast you are moving.

I'm thinking about relocating it to where the horn is mounted ahead of where it's at now using a aluminum bracket instead of the steel one it currently is attached to.
Not sure if you guys are active but has this ever caused no start by any chance ? I park my car outside for 8 hours in an uncovered parking lot under the 110 F Texas Sun and sometimes when I try to start, all the electricals turn on but no crank. I can only reproduce this error state in extreme heat. Nobody has been able to diagnose this so far. I had all the electrical system checked out and didn't find any issues.

Sent from my Pixel 6 Pro using Tapatalk
dynarun55 is offline   Reply With Quote
The Following User Says Thank You to dynarun55 For This Useful Post:
Trap63 (09-17-2023)
Old 09-17-2023, 02:21 PM   #11
Trap63
Senior Member
 
Trap63's Avatar
 
Join Date: Apr 2013
Drives: Brz WRB - Europe LHD
Location: TURIN - Piedmont - ITALY
Posts: 921
Thanks: 1,163
Thanked 834 Times in 288 Posts
Mentioned: 40 Post(s)
Tagged: 1 Thread(s)
Quote:
Originally Posted by dynarun55 View Post
Not sure if you guys are active but has this ever caused no start by any chance ? I park my car outside for 8 hours in an uncovered parking lot under the 110 F Texas Sun and sometimes when I try to start, all the electricals turn on but no crank. I can only reproduce this error state in extreme heat. Nobody has been able to diagnose this so far. I had all the electrical system checked out and didn't find any issues.

Sent from my Pixel 6 Pro using Tapatalk
My relocation of temp sensor
Attached Images
 
__________________
Trap63 is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ceramic Coated Ptuning Headers Ambient Temperature Testing s30series Engine, Exhaust, Transmission 32 03-17-2016 02:58 PM
Oil temperature sensor and cable Junkwipe Electronics | Audio | NAV | Infotainment 0 07-18-2014 10:06 AM
Car/Ambient temperature to log data gdrider77 Software Tuning 6 01-19-2014 08:49 AM
Ambient temperature's influence on horsepower BuBlake Engine, Exhaust, Transmission 40 04-10-2013 12:17 AM


All times are GMT -4. The time now is 05:46 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.