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Old 09-16-2013, 02:09 PM   #1
Drives: 2009 Toyota Yaris
Join Date: Feb 2012
Location: Chicago, IL
Posts: 8
I think I just blew my ECU while putting in an aftermarket radio

Hello all,

While attempting to install a new head unit into an North American 09 LB, I think I may have blown the/an ECU. Here are some of the variables I'm working with while trying to diagnose the exact problem:

-Everything works but the car will not start, starter clicks very rapidly like no other dead battery I've encountered. Think I will have it tested anyway. I also jumped it.

-The head unit in question is a Pioneer AVH-X8500BHS. The harness was professionally soldered and shrink wrapped by a friend, with one catch. I ordered a kit on amazon used to bypass the requirement of the parking brake in order to watch video while moving (i just wanted the option, i would not drive while watching a movie). I lost the instructions, so we had to guess where 2 of the 3 wires went. Obviously black to ground, but we guessed blue to blue, light green to dark green. I think this is where we may have shorted something out.

-I checked "most" fuses, but was in a rush and feel I need to check again. EFI fuses were good.

-What I believe is the nail in the coffin is when I tried to scan for error codes, my scanner only states linking error. Perhaps it may be a burned out wire, but shouldn't the fuses prevent a wire from burning? I smelled no burning. If it is the ECU, where exactly does that leave me? I know they are cheap but will need to have some sort of dealer work done on them.

-Thank god I still have my MR2 to get me places.

Thank you all for any input.
cbrodlo is offline   Reply With Quote

ecu, short, wiring

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