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- - 1990 Honda Accord EX (https://www.hondaaccordforum.com/forum/general-tech-help-7/1990-honda-accord-ex-31951/)

rozek

04-19-2010 09:29 AM

1990 Honda Accord EX

Does anyone know how to troubleshoot the ECU in this car? I don't have a clue. Please help. Thanks.

g22cd5

04-19-2010 09:31 AM

what do you mean? Check CEL codes?

rozek

04-19-2010 10:40 AM

The tread is how to troubleshoot ECU itself not retreaving CEL codes. How does one know if it is functioning properly or not.

JimBlake

04-19-2010 01:35 PM

When I had a 95, the Helm book explained it like this...

If the ECU is OK & there's no error codes stored, then it's like this:
When you jumper the SCS connector, the check-engine light will stay ON solid & not flashing.

If the check-engine light is lit up while driving, and jumpering the SCS connector shows NO flashing codes, THEN you suspect a bad ECU.

rozek

04-19-2010 03:26 PM

Thank you for your help. Please what is SCS connector if you don't mind?

JimBlake

04-19-2010 04:06 PM

The SCS connector is that blue-plastic plug which you jumper with a paperclip to read the CEL error codes. Jumper that, key on, & the CEL will flash the error codes.

This isn't really a PROCEDURE, so I'm gonna move the thread over to General Tech.

g22cd5

04-19-2010 04:51 PM

Quote:

Originally Posted by rozek (Post 201634)

The tread is how to troubleshoot ECU itself not retreaving CEL codes. How does one know if it is functioning properly or not.

Well explain yourself better. A lot of you ppl have a hard time doing that for some reason.:confused:

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