I am having trouble with the IAC being stuck at full open and does not respond to any changes made in megatune. When on the stim and I change PWM % the LED does not change brightness either. While assembling the board I bridged two of the solder cups on Q4 when installing the jumpers to the transistor. I thought that I got all of the solder off and could not see any when looking through a microscope. Is there a way to troubleshoot this without de-soldering the Jumpers. I checked to see that I wasn't using the FIdle pin as a "Spare Port". Will try any suggestions at this point. Thanks in advance for any suggestions.
MSII V3.0 EDIS Ford 4.9L (no Relay board)
Ford PWM IAC help
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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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Matt Cramer
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Re: Ford PWM IAC help
Try testing it in on/off mode. The signal that comes in is at the top side of R19 and should be 5 volts when the output is on, zero when it's off.
Re: Ford PWM IAC help
Thanks matt, will try as soon as I get out to the shop. Is on/ off mode a setting in mega-tune?
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Ford PWM IAC help
Yes, it's an idle control setting - I believe B&G calls it solenoid mode.