PWM IAC and relay board integration

For discussing injector selection,manifold modifications, throttle bodies, fuel supply system design and construction, and FIdle valves and IACs.
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
david martin
MegaSquirt Newbie
Posts: 30
Joined: Sun Feb 13, 2011 10:12 pm

PWM IAC and relay board integration

Post by david martin »

I apologize if this has already been answered, I have spent the past hour reading the IAC sections and using the forum search tool.

How do you integrate a 2 wire PWM IAC when using the relay board kit?

From my reading I believe a +12V is supplied to one terminal and the return wire is terminated at the relay board, but do not know where.

The requirements for PWM in step 62 of the mega manual have been completed.

Thanks
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: PWM IAC and relay board integration

Post by Matt Cramer »

Bypass the FIDLE relay with a jumper, like so: Image
david martin
MegaSquirt Newbie
Posts: 30
Joined: Sun Feb 13, 2011 10:12 pm

Re: PWM IAC and relay board integration

Post by david martin »

Matt, jumper has been installed. Do I terminate the pwm iac return wire to the Fidle terminal on the relay board?
david martin
MegaSquirt Newbie
Posts: 30
Joined: Sun Feb 13, 2011 10:12 pm

Re: PWM IAC and relay board integration

Post by david martin »

Somebody....Anybody???
kjones6039
Master Squirter
Posts: 618
Joined: Sat Jul 22, 2006 7:02 pm
Location: Eureka, Nevada USA
Contact:

Re: PWM IAC and relay board integration

Post by kjones6039 »

If you have installed the jumper as prescribed by Matt, then you can connect the idle valve to the FIdle terminal on the relay board.

Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/ms2extra 3.4.0 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
david martin
MegaSquirt Newbie
Posts: 30
Joined: Sun Feb 13, 2011 10:12 pm

Re: PWM IAC and relay board integration

Post by david martin »

Awesome! Thank you
Post Reply