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EA81T ECU Error codes
Posted: Fri Nov 19, 2010 8:24 pm
by Matt
Does someone have a list of error codes and how to read them (ie ignition on or running, etc; i know where the LED is for the reading just don't know when to read) for a standard EA81T ECU?
Thanks
Posted: Sat Nov 20, 2010 7:34 am
by Gannon
Subaru have kept the code numbers constant throughout the different models, so the link below should be of help (the EA81T used the same EFI system as the 3 plug 85-86 EA82T)
How to check EA82 MPFI ECU codes
Posted: Sat Nov 20, 2010 2:47 pm
by Matt
Sorry to be a pain but do you have a picture of the plugs as the harness on the engine is well average at the moment(it needs major cutting down which will happen in a few weeks) i am not sure which plug is which. Or even the number of pins in the plugs to help narrow it down.
Posted: Sun Jan 23, 2011 12:27 pm
by Matt
What does this code mean on a 3 Plug ECU?
12 - Starter Switch (remains OFF)
Posted: Sun Jan 23, 2011 9:54 pm
by Gannon
It means the ECU is not getting a voltage signal from the starter circuit when it you turn the key. It will result in poor starting because the ECU doesnt know when to give start enrichment.
A wire from the ECU is joined to the wire that goes from the key to the starter. Its that simple.
Do you have a wiring diagram or a ECU pin out?
Posted: Mon Jan 24, 2011 9:50 am
by Matt
I thought it was around that area which makes sense as to why it is running like crap when cold. No i don't have a pin out for it!! Anyone got one they can email me?
[email protected]
Posted: Tue Jan 25, 2011 7:25 am
by discopotato03
Coxy here managed to find somw WSM info , exploded diagrams of the 81T turbo system . PM him to see if he has the computer pinout .
I remember looking at the diagrams he had and thinking this is very close to what an 85/86 EA82T system uses .
A .
Posted: Tue Jan 25, 2011 11:13 am
by Matt
Apparently it is the same as a EA82T 3 plug pinout. And EA82T one would help greatly to get me heading in the right direction.

Also PM Sent. Thanks

Posted: Sat Jan 29, 2011 6:13 pm
by Matt
Does anyone have a copy of the service manual or pin outs for a EA81T??? Thanks in Advance..