Ecu fried? - Nissan Forum
B14 95-99 chassis 1995-1999 Sentra and 1995-1998 200SX

 
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#1 Old Nov 7th, 2012, 12:47 AM
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Ecu fried?

Hi, I'm new to the Nissan forum. I have a 1995 200sx with a 1.6L. I'm in the process of doing the Sr20det swap. About a week before my 1.6 died, my signal light stopped working. After pulling my engine I got bored one day and put the battery back in and fiddled with the signal light. Well, in the process the wire from the positive battery terminal to the starter touched a wire going into the ECU (I'm assuming it was a ground but not sure). Now nothing works in the car no lights, no radio, windows, sunroof, locks and since there is no engine I can't try starting it. I'm wondering if I maybe fried my ECU? I checked all the fuses and fusible links under the hood and in the dash. I'm hoping that its just the ECU since I need a new one for the swap...

Thank you!!
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#2 Old Nov 7th, 2012, 07:28 AM
jdg
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ECU doesn't control the lights, radio, windows, sunroof, locks.
Sure you checked all of those fusible links?
Get out your meter, test light, noid light, whatever you got and start checking continuity.

99% of the questions that are "STRANGE" have a dirt simple answer...usually answered by a dirt simple search.

NISSAN GOOGLE

Is it just me, or does the majority overlook the obvious?

Somebody ate a whole bag of dumbass for breakfast.

Why do people continue to run a vehicle when a warning light comes on or starts flashing? Isn't that a clue that something is wrong and you probably should NOT drive it?
Is this whole car driving thing really freekin' brain surgery?

Here's something new for the crowd/clowns...
"A little bit of Google goes a long way!"

Ever notice the one post wonders for info on turbo'ing a GA16 are never heard from again after they figure out the cost???

And if you can read this, you don't need glasses! :)

And yes, I am diggin' it...
#3 Old Nov 7th, 2012, 07:42 AM
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Alright. I'm sure I checked them all. Theres the two boxes by the battery, the panel inside, and then the box of relays on the passenger side, thats all of them right? I'll try checking for continuity when I get off work today..
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#4 Old Nov 7th, 2012, 02:22 PM
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I agreee with jdg. When looking at multiple, unrelated items that all of the sudden stop working, the most common cause is a blown fusible link. Next would be a bad ignition switch. The ECM has nothing to do with lights and wipers. It wouldn't be a bad idea to unplug the ECM, however, if you plan on working on the electrical system without the engine installed to be on the safe side.
#5 Old Nov 11th, 2012, 10:35 AM
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Alright, I used a test light and checked all the fuses. I'm getting power to everything under the hood except for the Clutch relay on the passenger side. I'm also not getting power to several of the fuses in the dash but they are not blown. I only have power to one of the engine control fuses. I did test the fuses with the key in the on position. I'm really confused. Thanks for all the replies!
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#6 Old Nov 11th, 2012, 10:52 AM
jdg
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You got power, but possibly no ground, possibly because the negative terminal (e.g. a ground wire), while connected to the battery, may be hanging out in the wind since there is no engine in there, where it was previously connected.

99% of the questions that are "STRANGE" have a dirt simple answer...usually answered by a dirt simple search.

NISSAN GOOGLE

Is it just me, or does the majority overlook the obvious?

Somebody ate a whole bag of dumbass for breakfast.

Why do people continue to run a vehicle when a warning light comes on or starts flashing? Isn't that a clue that something is wrong and you probably should NOT drive it?
Is this whole car driving thing really freekin' brain surgery?

Here's something new for the crowd/clowns...
"A little bit of Google goes a long way!"

Ever notice the one post wonders for info on turbo'ing a GA16 are never heard from again after they figure out the cost???

And if you can read this, you don't need glasses! :)

And yes, I am diggin' it...
#7 Old Nov 11th, 2012, 10:55 AM
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Makes sense.. haha thank you!
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#8 Old Nov 11th, 2012, 11:10 AM
jdg
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It happens. I did the same thing in my '76 Blazer...except it's not that the engine was pulled, it was that I didn't connect the ground up the engine block after replacing both battery cables. Ground was still hooked up to the firewall, fenders, frame rails, etc. Causes all sorts of stupid to go on under the hood...and under the hat.

99% of the questions that are "STRANGE" have a dirt simple answer...usually answered by a dirt simple search.

NISSAN GOOGLE

Is it just me, or does the majority overlook the obvious?

Somebody ate a whole bag of dumbass for breakfast.

Why do people continue to run a vehicle when a warning light comes on or starts flashing? Isn't that a clue that something is wrong and you probably should NOT drive it?
Is this whole car driving thing really freekin' brain surgery?

Here's something new for the crowd/clowns...
"A little bit of Google goes a long way!"

Ever notice the one post wonders for info on turbo'ing a GA16 are never heard from again after they figure out the cost???

And if you can read this, you don't need glasses! :)

And yes, I am diggin' it...
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  Nissan Forum > Sentra, Pulsar, NX, B14 200SX > B14 95-99 chassis

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