buffon01

iTrader: (9)

I had an issues with the alternator overcharging the battery on my way back home from a trip. In an attempt to make it home I tried unplugging the battery and try to drive the car. It didn't work and the car immediately shut off.

I tried restarting and MS would not power on anymore. I checked the fuses and replaced the 80amp main in the engine bay. After that MS wont come on. I grounded the fuel pump to make sure that it works and it does. So it's definitely MS. I have the unit off the car, how can I diagnose if the board is fried? Thanks

Matt Cramer

What main board version do you have?

buffon01

iTrader: (9)

MSV30
BG

That's what is written on it.

Matt Cramer

That's the chip etching. See this link for how to ID the MegaSquirt:

http://www.msextra.com/doc/general/whatmegasquirt.html

buffon01

iTrader: (9)

Looks like a 3.0 pcb

Braineack

iTrader: (62)

he has a v3.0 board MS1 that I built him back in like 2007.

can you tell if any diodes or capacitors look fried? specifically the large yellow ones near the serial port.

buffon01

iTrader: (9)

They do not seem to be fried

buffon01

iTrader: (9)

I tested the diodes with a multimeter and they all seem fine. Any other ideas? I need to have my car running asap

Schuyler

iTrader: (1)

Did you check all the fuses in the cabin? The "Engine" controls the main relay and fuel pump relay.

buffon01

iTrader: (9)

Yeah they all were fine. Although, I'll double check them later tomorrow again.

buffon01

iTrader: (9)

I checked the fuses again today just to be sure and they're all fine.

Also, for an instant I plugged in MS and it lit up. However, when I tried again I got no signal from it and the LEDs went dead again.