ECU code 05?

[89Ru]

Huh? Looked in the FSM and no mention of code 05...in both U-check mode (green connectors under hood unplugged) and D-check mode (green connectors plugged together) with ignition on (engine not running) I read five fast blinks on the ECU led, separated by a ~2 sec. gap. I read this as a '5', is this right? No slow blinks that would indicate a '10'...

 

I got a CEL a week ago while driving at slow speed, but it went out quick...thats what started me on this...hasn't lit since.

 

I wonder if this is a specification code, but I don't recall it ever indicating this code before...

 

89 GL 3-door dual range

[Skip]

wrong connectors

Those are for setting the timing

and for select monitor use

 

try the white or if you have them black

 

connectors beside the green ones

[89Ru]

Whoa, connected the white ones and the ECU had quite a story to tell, like it had bottled up years of memories without anyone to talk to...to me this sounds like "read memory" mode

 

According to the FSM:

 

Connecting green (test mode) connectors = D-check mode (fuel pump runs intermittently)

 

Connecting white connectors = Read memory

 

Connecting both green and white = clear memory (with engine on)

 

Thanks for setting me straight on this.

[john in KY]

Ignore single digit codes. They indicate things like automatic/manual/California equipped.