stuck on step 22 on MSII build

[Project 325i]

Im stuck, do i install this or what do i do?

On Megamanual im on step number 22:


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

If you will be using an ignition output signal to control a coil or ignition module with MS-II, you will, likely be directed to jumper JS10 to:

• IGN, or
• IGBTIN, with IGBTOUT jumpered to IGN

If you will be using CAN communication between boards (MS-II and GPIO, for example), you should also jumper JS6 to SPR1/CANH and JS8 to SPR2/CANL

I figured id post on here too. thanks

[nando]

I don't know how far you are but I'd use these instructions rather than the megamanual:

http://www.msextra.com/doc/ms2extra/build_manual.htm

put in the S12c jumper (you don't *need* it but it doesn't hurt) and use "IGBTIN, with IGBTOUT jumpered to IGN" for the V3.0 coil driver at Q16. I don't think you'd use JS10 for that, but rather one of the LED outputs. follow what the MSextra manual says in any case.

[Doughnut]

http://www.msextra.com/doc/ms2extra/build_manual.htm

This link is set out in amazing detail! Very nice.