Microsquirt playing dead after sitting on shelf
Posted: Wed May 23, 2012 6:59 am
Hello,
Sorted through pages of posts and theres a few similar results but not close enough or never fixed. I have been working on a joint project of building a 3cyl 2stroke streetbike that we have added reeds, FI, and electronic spark (amongst much more). A couple years ago I had the micro hooked up to basic sensors on the bike and fooled with settings and such to familiarize myself, and everything worked perfectly. I am using the same laptop and same (Prolific?) usb>serial adapter.
The trouble is, Yesterday I tried to connect to it with no result. I have isolated it from the bike giving it good power and ground, tried a second serial cable, tested the Vref, and all per the comm diag procedures. I have confirmed the serial port. Tunerstudio claims no firmware, even though it had a working load on it. I tried updating to the newest firmware using the MS-II download utility, it seemed to work fine. When I use MS-II downloader to read the signature it returns "<a<" every time. I then accidently discovered that it will complete a firmware update WITHOUT grounding the bootloader wire. It completes and passes the verification mode also. On the rare chance tuner studio finds it on auto detect the Detected Firmware field is blank. Im totally scratching my head with this one. I tested my port connectivity (using same serial cable and adapter) with a LC-1 wideband controller and it works flawlessly.
There is a 1% chance that the Vref contacted 12v for a fraction of a second at one point, but I cannot confirm or deny if I had power on that wire at the time, and if contact was even made. When the unit is powered up, theres no outputs, no FP, nothing. I do have a scope, and plenty of electronics experience, Any place I should go right to and start with? Sorry for the long wind, wanted to cover everything I know.
Thankyou for your time!
R
Sorted through pages of posts and theres a few similar results but not close enough or never fixed. I have been working on a joint project of building a 3cyl 2stroke streetbike that we have added reeds, FI, and electronic spark (amongst much more). A couple years ago I had the micro hooked up to basic sensors on the bike and fooled with settings and such to familiarize myself, and everything worked perfectly. I am using the same laptop and same (Prolific?) usb>serial adapter.
The trouble is, Yesterday I tried to connect to it with no result. I have isolated it from the bike giving it good power and ground, tried a second serial cable, tested the Vref, and all per the comm diag procedures. I have confirmed the serial port. Tunerstudio claims no firmware, even though it had a working load on it. I tried updating to the newest firmware using the MS-II download utility, it seemed to work fine. When I use MS-II downloader to read the signature it returns "<a<" every time. I then accidently discovered that it will complete a firmware update WITHOUT grounding the bootloader wire. It completes and passes the verification mode also. On the rare chance tuner studio finds it on auto detect the Detected Firmware field is blank. Im totally scratching my head with this one. I tested my port connectivity (using same serial cable and adapter) with a LC-1 wideband controller and it works flawlessly.
There is a 1% chance that the Vref contacted 12v for a fraction of a second at one point, but I cannot confirm or deny if I had power on that wire at the time, and if contact was even made. When the unit is powered up, theres no outputs, no FP, nothing. I do have a scope, and plenty of electronics experience, Any place I should go right to and start with? Sorry for the long wind, wanted to cover everything I know.
Thankyou for your time!
R