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Old 01-22-2008, 12:06 PM   #1
Fongers
Scooby Specialist
 
Member#: 118239
Join Date: Jun 2006
Chapter/Region: SCIC
Location: Beijing and Venice Beach
Vehicle:
2002 Built Wagon
Wife- 2004 Outback SE

Default Fried my ECU wiring?

I was installing a gm bcs and I think I fried my ecu by crossing some wires. The gm and fbcs are still working (fully tested) yet I keep throwing a p0245 code (wgs low).

Through some testing, I have realized that there is instant 12v power to the bcs connector as soon as they key is on. I know that this device is actuated by the blk ground wire to the ecu and that the positive wire (yellow) hooks to a constant 12v+. That means the blk wire should be cold until there is wdc? I've checked the blk wire to ensure it didn't somehow short to the ground (it didn't but does provide some ground-like circutity). Now, the circuit automatically turns the bcs to on mode and is always on right now with a constant 12v flowing through it.

My theory is that I'm screwed and that the blk wire in the ecu somehow shorted the ecu relay "always on" or just jumped the board onto another always on ground circuit.

HELP
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Old 02-01-2008, 12:26 PM   #2
Fongers
Scooby Specialist
 
Member#: 118239
Join Date: Jun 2006
Chapter/Region: SCIC
Location: Beijing and Venice Beach
Vehicle:
2002 Built Wagon
Wife- 2004 Outback SE

Default

Hey folks, just wanted to close out this thread. I did kill the ecu and had to get a new one. Coudln't even repair it though as it blew out a diode (which I replace) but also must've done board damage (short between the gr to this and also to a soldering joint next to it for the drain valve). Well, lessons learned and i have a running theory in the process:

All Subaru WRX ECU's can be swapped out btw 02-03 cars so long as the "AF4XX" # starts in AF42X. I had a few junkyards tell me I couldn't use the one I got but it popped in, works fine and just reflashed it.

Oh yeah - Car part.com for this stuff y'all. I love these boards but I think there is a glut of these things on the market. Got an ECU for $80 shipped and it got here in 2 days after order.
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