Hello,
Background: 4.3 chevy TBI
MSII v3.0 with stock sensors (except MAP, which is the one that came with MSII).
DIYAutoTune 10 foot harness
The IAC sensor is the 4 wire stepper (2 rows of 2) and is not only labeled with and "A" side and a "B" side.
I am not sure if I have the IAC wired correctly (engine started at 1900 rpm and as it warmed up increased to 2200).
I have noticed that there are a few different diagrams out there for how to wire the IAC.
I wired it according to this diagram:
https://www.google.com/search?q=megasqu ... dPDRP_M%3A
Question 1): Is this the correct way to wire the gm 4 wire (2 rows of 2) IAC stepper motor?
Question 2): Can someone explain how this stepper motor is labeled so that way I know which wire on the connector is 1A, 1B, 2A, 2B?
Will
GM 4 wire stepper IAC (2 rows of 2)
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).
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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.
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ironwill11
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Re: GM 4 wire stepper IAC (2 rows of 2)
I'm no expert and I haven't gotten mine to work yet but I think you look for the pairs (on the iac) that have matching resistance. Then you have to figure out witch ones open and close.
John
John
looks just like a Telefunkin u-47!
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DonTZ125
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Re: GM 4 wire stepper IAC (2 rows of 2)
This. Check for cintinuity between any two pins. If they're connected, you have a pair; otherwise it's the other pin next to it.
