Does ECM need to "learn" after replacing faulty EGR valve?

[OlSmokie]

I just replaced a faulty EGR valve on my 1990 C1500 5.0 that was causing my check engine light to come on.
I was told that I had to disconnect my battery for several minutes, which I did, to reset my ECM.
Does it just instantly recalibrate itself, or is there a procedure for allowing it to learn?

 

[kenh]

Disconnecting the battery clears the code. There shouldn't be any relearn period. I may be wrong as I'm fairly new to to the GMT 400.

Ken

 

[PlayingWithTBI]

It may have to "relearn" your INT/BLM (on a TBI, Vortec is Short Term/Long Term) trims while cruising in Closed Loop since the EGR valve was effecting AFR but, it should be able to do that during a fairly short trip.

 

[Supercharged111]

It may have to "relearn" your INT/BLM (on a TBI, Vortec is Short Term/Long Term) trims while cruising in Closed Loop since the EGR valve was effecting AFR but, it should be able to do that during a fairly short trip.

That and any idle airflow/IAC stuff if the TBI computers did that, but you'd know better than me there. EGR should just work if there are no codes present.

 

[PlayingWithTBI]

idle airflow/IAC stuff if the TBI computers did that

IFAIK it shouldn't since, when you turn off the key the IAC goes to its "Park Position", almost wide open. Then when you turn the key on it goes to the "Power up Initial Steps" based on CTS feedback.

 

[Supercharged111]

IFAIK it shouldn't since, when you turn off the key the IAC goes to its "Park Position", almost wide open. Then when you turn the key on it goes to the "Power up Initial Steps" based on CTS feedback.

So it doesn't apply a learned value on top of that power up initial steps? The Vortec PCM does, but it's understandable if the older one doesn't.

 

[PlayingWithTBI]

So it doesn't apply a learned value on top of that power up initial steps?

I don't think so unless it's buried in the code somewhere. I don't see any Scalars or Tables that are modified by the ECM, they're all static settings, AFAIK.