Engine Management eCtune , Crome , AFC , FMU , Zdyne , Hondata , EMS , TE , Uberdata Anything to control your fuel, spark needs!

How to tell if my ECU is fucked

Old 04-20-2003, 10:23 AM
  #1  
JD
1.5 BAR
Thread Starter
 
Join Date: Mar 2003
Posts: 811
Default How to tell if my ECU is fucked

I put a post up a few days ago about my AFC going defective on me but things are looking up as now I just got my new SAFC 2 in. I am about to put it in and just needed to know how to see if my ECU is fucked up. I don't want to throw another AFC up there just to find out that my ECU is the thing thats fucked up u know? Anything I should look for when I'm digging all around? And how do you tell what the code is when you have a CEL on?
JD is offline  
Old 04-20-2003, 12:09 PM
  #2  
1.0 BAR
 
Join Date: Jan 2003
Posts: 349
Default Re:How to tell if my ECU is fucked

You can try reinstalling the stock injectors and unplugging the SAFC completely. Then see if the car starts and idles fine. or what codes you get from the ECU. If the CEL light doesn't blink or light up at all with the service jumper connected and the ignition turned on, you got a bad ECU.
91AccordLX is offline  
Old 04-20-2003, 03:10 PM
  #3  
0.5 BAR
 
Join Date: Jan 2003
Posts: 116
Default Re:How to tell if my ECU is fucked

one thing I just thought of... you didnt add resistors for the injectors did you? cause your car has peak & hold injectors stock, just like the DSM, so you dont need a resistor pack (it already has one) or inline resistors.
Im sure you already have that coverd... but its just something that occured to me, you never know!
Anton is offline  
Old 04-20-2003, 10:18 PM
  #4  
JD
1.5 BAR
Thread Starter
 
Join Date: Mar 2003
Posts: 811
Default Re:How to tell if my ECU is fucked

Nope I sure didnt put resistors. Thanks for the help though. I'l be putting this new SAFC 2 in tonight so I hope everything turns out ok. Can I buy one of these things that tells me the code I'm throwing?
JD is offline  
Old 04-20-2003, 10:24 PM
  #5  
1.0 BAR
 
Join Date: Jan 2003
Posts: 349
Default Re:How to tell if my ECU is fucked

You don't need to buy anything to find out what code your getting. Just connect the service jumper under the passenger side dash and turn the ignition on, but don't start the engine. The Check Engine Light will blink what codes are stored.
91AccordLX is offline  
Old 04-21-2003, 01:37 AM
  #6  
JD
1.5 BAR
Thread Starter
 
Join Date: Mar 2003
Posts: 811
Default Re:How to tell if my ECU is fucked

ok well I tried to install this new SAFC 2 I just bought and I got all the wires straight and everything and guess what. IT STILL DIDNT CUT ON!!! I'm thinking that even if my ecu could have gotten fucked up the AFC would still power up because it's hooked to a power wire that goes into the ECU. Isn't this right? Should I be tracking down power wires instead of messing with the ECU? I'm really thinking that the AFC would at least cut on no matter if the ECU is broken or not. You think that the car and everything won't start because the power wire going into the ecu is messed up?
JD is offline  
Old 04-21-2003, 09:43 AM
  #7  
0.0 BAR
 
Join Date: Feb 2003
Posts: 0
Default Re:How to tell if my ECU is fucked

1) check your install instructions against wiring diagrams for your car in a Helms manual

2) check to see if you have power and ground where you are supposed to.

Tom-Guy is offline  
Old 04-21-2003, 10:45 AM
  #8  
1.0 BAR
 
Join Date: Jan 2003
Posts: 349
Default Re:How to tell if my ECU is fucked

Originally Posted by Joseph Davis
1) check your install instructions against wiring diagrams for your car in a Helms manual

2) check to see if you have power and ground where you are supposed to.



LOL, Yes definiately do what Joseph Davis said first, cause I know I wired my S-AFC2 wrong the first time and I thought my S-AFC was dead cause it didn't turn on
You can also test the power wires to your ECU/S-AFC with a 12v bulb or something to make sure there is current going through the wires. Also don't forget to make sure the ECU and Radio Backup fuses aren't blown either!
91AccordLX is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mgs2057
Turbo Parts For Sale
6
12-26-2007 10:36 PM
sohcpwr
Hybrid/Tech
26
10-26-2007 12:36 AM
-SphiNx-
Engine Management
15
09-20-2005 06:00 PM
tukinnam
General Discussion
16
04-20-2005 10:19 PM
J-MAN
Forced Induction
27
11-16-2004 06:57 PM


Thread Tools
Search this Thread
Quick Reply: How to tell if my ECU is fucked


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.