I am building an ms1 v3 and I am a little confused. I have a holley throttle body with a stepper iac. The directions say...
22. Now you need to make a decision on the first 'optional' component: if you are going to use an IAC stepper motor with MegaSquirt-II, you must install a jumper from the hole marked S12C to the hole marked JS9 (+12C). These are on the bottom side of the board, on the DB9 side of the processor. DO NOT INSTALL THIS JUMPER FOR NON-MegaSquirt-II APPLICATIONS - IT WILL DESTROY THE PROCESSOR!!
If you are going to use a stepper style IAC (such as the GM IAC), you need to connect jumpers to bring the controller signals out to the DB37:
Connect (1A)JS0 (under the processor socket) to IAC1A (near the DB37 connector) - this brings out IAC1A on DB37 pin #25
Connect (1B)JS1 (under the processor socket) to IAC1B (near the DB37 connector) - this brings out IAC1B on DB37 pin #27
Connect (2A)JS2 (under the processor socket) to IAC2A (near the DB37 connector) - this brings out IAC2A on DB37 pin #29
Connect (2B)JS3 (under the processor socket) to IAC2B (near the DB37 connector) - this brings out IAC2B on DB37 pin #31
So for part 22. I don't jump s12 to js9, because that is for msII. But I can go ahead and install the jumpers below that for my ms 1? I just want to be sure I'm reading it right.
Stepper iac on ms1??
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.
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.
-
Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Stepper iac on ms1??
Rusty,
You cannot use a stepper motor IAC with MS-I (so don't install any of the jumpers, they won't work). If you want to use a stepper IAC, you MUST upgrade to MS-II (and install the jumpers).
Lance.
You cannot use a stepper motor IAC with MS-I (so don't install any of the jumpers, they won't work). If you want to use a stepper IAC, you MUST upgrade to MS-II (and install the jumpers).
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
-
Rusty_chevelle
- MegaSquirt Newbie
- Posts: 2
- Joined: Thu Jan 02, 2014 7:07 am
Re: Stepper iac on ms1??
Well that's sucks.
-
wickededdie
- MegaSquirt Newbie
- Posts: 8
- Joined: Sun Sep 08, 2013 4:56 pm
- Location: s.w. pa.
Re: Stepper iac on ms1??
Hi If i have read upgrades correctly you can remove the 40 pin prossesor that came with the ms1 and install the ms2 in its place and make some other mods. some one else out there may know more on this?
if it ain,t blown it sucks
Re: Stepper iac on ms1??
Correct - it's a simple as that. The stepper motor driver IC is on the MS2 daughter board. The V3 board is the same.
If you do decide to configure it for a stepper motor and MS2 do not power it up with an MS1 installed. The 12v feed for the stepper chip on MS2 will damage MS1.
If you do decide to configure it for a stepper motor and MS2 do not power it up with an MS1 installed. The 12v feed for the stepper chip on MS2 will damage MS1.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband