Finding the ECU error codes
#1
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This comes from my little Civic notebook on my PC too.
All this info I gathered some time ago, glad to put it to good use now!
Here is how you get the ECU to spit out its error codes-
Locate the ECU under the carpet in the passenger foot well.
Find the red LED in the center of the ECU.
Turn the ignition to ON. The red LED should flash once when this happens to indicate that the ECU has power.
If there are no further flashes then there are no error codes.
If there are further flashes then there are one or more error codes.
All this info I gathered some time ago, glad to put it to good use now!
Here is how you get the ECU to spit out its error codes-
Locate the ECU under the carpet in the passenger foot well.
Find the red LED in the center of the ECU.
Turn the ignition to ON. The red LED should flash once when this happens to indicate that the ECU has power.
If there are no further flashes then there are no error codes.
If there are further flashes then there are one or more error codes.
#5
There is the paper clip check. Turn the ignition on and off 3 or four times and the cel should flash giving you the code(not sure if it works on civics but the neons i work on work like that).
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Originally Posted by Tayler
There is the paper clip check. Turn the ignition on and off 3 or four times and the cel should flash giving you the code(not sure if it works on civics but the neons i work on work like that).
Thats a quicker and probably easier to follow description than mine, thanks for that
#10
On 92-95 civic there are two plugs above the ecu (in a green soft plastic holder) the one with two pins can be jumpered with a paper clip or just a piece of wire with the engine running or stopped after the cel comes on. It will start to flash codes using the cel . one long flash followed by four short flashes is code 14. two long and one short is code 21, two short is code 2 and one long is code 10. that is how it is read by the flashes. once codes flash it will give all codes that it has at that time(separated by about 2 second intervals) then stop for about 4 second and the repeat all codes over and over until you remove the jumper.
#11
I wonderd why this was called the paper clip test. God to know. I always tried to see how to get in the machine, yes the little computer does make mistakes but if they are tied into the rest of the car operation it might be a sympton of something else going wrong.
remember Murphy;'s law: a $600 computer circuit "brain" will blow its charge and burn out to protect a $15 fuse.
remember Murphy;'s law: a $600 computer circuit "brain" will blow its charge and burn out to protect a $15 fuse.
#12
Re: Finding the ECU error codes
I wonderd why this was called the paper clip test. God to know. I always tried to see how to get in the machine, yes the little computer does make mistakes but if they are tied into the rest of the car operation it might be a sympton of something else going wrong.
remember Murphy;'s law: a $600 computer circuit "brain" will blow its charge and burn out to protect a $15 fuse.
remember Murphy;'s law: a $600 computer circuit "brain" will blow its charge and burn out to protect a $15 fuse.
the problem Im have'n is no start. I have fuel weak spark and compression. Ive put in 2 different distributors and still no dice. all fuses are good battery is good , grounds ......WTF....... help...
Mike
#13
Re: Finding the ECU error codes
can anyone help get my radio code please. had battery off and cant get it anywhere all i have is the serial no 30006922 is a y reg civic if anyone can help u can email me at craw76@googlemail.com
Last edited by craw76; 05-27-2010 at 12:45 PM.
#14
Re: Finding the ECU error codes
i think this is a bit different on later models. have a 95 civic which i got some years back and while using this step to check the error codes it did not show. finally had to show it to the mechanic for getting the proper work done. although overall a reliable car that week was a bit off as several things went off at the same time. hope it does not bother again.
#15
Re: Finding the ECU error codes
my car has had problems starting for a while. i have a '91 civic and it turns over, just doesn't start. the light blinks 4 times, then after blinks 8. does anyone know what error code this may be?
Last edited by beckyjerk; 08-17-2010 at 09:20 PM.
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