MSPNPPro-MM0105: Coolant Temperature Output - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 09-30-2015, 03:39 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2007
Location: Morro Bay, CA
Posts: 53
Total Cats: 0
Default MSPNPPro-MM0105: Coolant Temperature Output

MSPNPPro-MM0105

I'm looking to adjust the coolant temperature output values so I can run an aftermarket gauge. I'm using the stock 2001 temp sensor and harness. Coolant temp gauge is wired through the X-16 connector.

Tuner studio shows 170*F, Autometer gauge shows 255*F

Any thoughts?
slomiata is offline   Reply With Quote
Old 09-30-2015, 05:28 PM   #2
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Your autometer gauge needs its own sending unit. Disconnect it from the ECU.
Ben is offline   Reply With Quote
Old 09-30-2015, 06:55 PM   #3
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,327
Total Cats: 1,926
Default

What Ben said.

Your autometer gauge, like nearly all temperature gauges, isn't looking for a voltage input, it's looking for a variable resistance to ground. Your ECU cannot emulate this. (I'm not aware of any that can.)

Long story short: install a temperature sensor appropriate to the gauge.
Joe Perez is offline   Reply With Quote
Old 10-01-2015, 11:48 AM   #4
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

You MIGHT be able to spoof it with a generic PWM output. But this is going to take some trial and error.
Matt Cramer is offline   Reply With Quote
Old 10-01-2015, 02:02 PM   #5
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,878
Total Cats: 344
Default

Use the ECU to drive a stepper motor on a potentiometer!

--Ian
codrus is offline   Reply With Quote
Old 10-07-2015, 02:11 PM   #6
Junior Member
Thread Starter
 
Join Date: Oct 2007
Location: Morro Bay, CA
Posts: 53
Total Cats: 0
Default

Looks like adding the autometer sensor is the way to go. Thanks for the input guys :-)
slomiata is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Is my swirl pot design okay? FrankB Race Prep 10 10-02-2015 10:00 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:08 AM.