electrical fan control

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.

If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).

If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days

The full forum rules are here: Forum Rules, be sure to read them all regularly.
Post Reply
charlhey
MegaSquirt Newbie
Posts: 4
Joined: Sun Aug 02, 2009 7:08 am

electrical fan control

Post by charlhey »

on my setup i'm not using an idle control IAC , was wandering if i can use the Fidle outputs to control my cooling fan? since it's coolant dependent?
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: electrical fan control

Post by Matt Cramer »

Yes, although the MS1 code does not have any hysteresis so it will turn off and on at the same temperature. MS2 code lets you use it as a spare output, which will let you turn the fan on above a certain temperature and off at a different temperature so it doesn't cycle on and off so much.
charlhey
MegaSquirt Newbie
Posts: 4
Joined: Sun Aug 02, 2009 7:08 am

Re: electrical fan control

Post by charlhey »

if i want to use x11-x14 outputs to drive a fan relay ,can i do it without putting a resistor and a transistor
on the proto area i would like to do it externaly on the MS , if not i will control the fan manually, i would
love to have a diagram , can you email it to me?
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: electrical fan control

Post by Matt Cramer »

If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
charlhey
MegaSquirt Newbie
Posts: 4
Joined: Sun Aug 02, 2009 7:08 am

Re: electrical fan control

Post by charlhey »

it's a ms-1 with a v 3.0board
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: electrical fan control

Post by Matt Cramer »

You'd have to use MS1/Extra firmware to do that - regular B&G code does not have any extra outputs for the fans.
Post Reply