I'm running the Megasquirt II V3 board. I can't get the RPM signal into the ECU. It is running a VR sensor (2-wire) and when I put a scope on it and take the spark plug out, I see one -400mV to 400mV pulse per revolution, and then what appear to be garbage on the line in the range of -5 to +5 mV between pulses.
I'm not sure how to configure the software on the megasquirt to read this input. I understand that I will probably have to adjust the pots on the inside, but I don't even know what version of the Firmware would be best.
I know coinsidentally when I ran the 2.5 code when I first tried to do this, I got an occasional RPM signal in the Megatune software, but then I upgraded to version 2.6 and started playing with the pots and now I'm not getting anything.
Any help would be appreciated.
BTW: This is a single cylinder motor, and the "trigger wheel" is built into the alternator where one of the coil windings is replaced by a piece of metal. I was expecting to see a 12-1 pulse reading but that doesn't appear to be the case.
Yamaha YFZ450 VR Sensor
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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). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
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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darrenk
- MegaSquirt Newbie
- Posts: 3
- Joined: Tue Sep 27, 2005 8:48 am
- Location: Baton Rouge, LA
- Contact:
I got it to pick up the RPM signal by turning the pots all the way to the left, then running 2.6 code, and telling it I had no trigger wheel (by entering 0 in trigger wheel setup)
I can't start it just yet because I burned up the high current ignition driver somehow the other day, but I'll post progress here.
I can't start it just yet because I burned up the high current ignition driver somehow the other day, but I'll post progress here.