secondary fan with A/C on?
Thread Starter
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
secondary fan with A/C on?
Hi
I´m wondering if when I turn on the AC, the secondary fan, like the primary, MUST turn on.
It is a 93 with electronic AC which works very well, either cold or warm.
As the car doesn´t has temperature issues, the secodary fan never turns on, but I know the electric motor works because i forced a trouble code disconnecting the MAF sensor and saw the two fans working together.
If the fan must turn on with the AC, where can i look to find the problem?
thanks in advance
I´m wondering if when I turn on the AC, the secondary fan, like the primary, MUST turn on.
It is a 93 with electronic AC which works very well, either cold or warm.
As the car doesn´t has temperature issues, the secodary fan never turns on, but I know the electric motor works because i forced a trouble code disconnecting the MAF sensor and saw the two fans working together.
If the fan must turn on with the AC, where can i look to find the problem?
thanks in advance
Thread Starter
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
secondary fan with A/C on?
Hi
I´m wondering if when I turn on the AC, the secondary fan, like the primary, MUST turn on.
It is a 93 with electronic AC which works very well, either cold or warm.
As the car doesn´t has temperature issues, the secodary fan never turns on, but I know the electric motor works because i forced a trouble code disconnecting the MAF sensor and saw the two fans working together.
If the fan must turn on with the AC, where can i look to find the problem?
thanks in advance
I´m wondering if when I turn on the AC, the secondary fan, like the primary, MUST turn on.
It is a 93 with electronic AC which works very well, either cold or warm.
As the car doesn´t has temperature issues, the secodary fan never turns on, but I know the electric motor works because i forced a trouble code disconnecting the MAF sensor and saw the two fans working together.
If the fan must turn on with the AC, where can i look to find the problem?
thanks in advance
Melting Slicks
Joined: May 2014
Posts: 2,878
Likes: 589
From: New Port Richey FL
I took a look in the 93 service manual and it tells the secondary fan is controlled by the ECM and is activated when. the following occur
A/C sends high pressure signal
when any ECM diagnostic code is set
ECT above 234deg F
engine oil temp. 235deg F
this is a revision post
Last edited by s carter; Sep 1, 2014 at 02:04 PM.
Thread Starter
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
yes, i mean that fan, the one on passengers side.
225 psi on A/C head, is an issue?
what is ECT?
Sorry, but i´m new with Corvettes and english it´s not mt language, therefore at the moment i´m not familiar with certain terms and abbreviations.
Melting Slicks
Joined: May 2014
Posts: 2,878
Likes: 589
From: New Port Richey FL
E-C-T = Engine Coolant Temp
Melting Slicks
Joined: May 2014
Posts: 2,878
Likes: 589
From: New Port Richey FL
stand by one second I have a revision on previous temps and stuff temps are out updating now
Secondary fan will run when
ECM has trouble codes (DTCs)14,15,52, or 62 (DTC= diagnostic trouble code)
ECT above 234deg. F
Engine above 235deg F
A/C high pressure switch signal from A/C fan switch
the earlier numbers bugged me and rite now I don't see were they came from, these numbers are post lunch not pre breakfast
Secondary fan will run when
ECM has trouble codes (DTCs)14,15,52, or 62 (DTC= diagnostic trouble code)
ECT above 234deg. F
Engine above 235deg F
A/C high pressure switch signal from A/C fan switch
the earlier numbers bugged me and rite now I don't see were they came from, these numbers are post lunch not pre breakfast
Last edited by s carter; Sep 1, 2014 at 01:34 PM.
Thread Starter
Racer
Joined: Mar 2014
Posts: 267
Likes: 24
From: Montevideo, Uruguay
stand by one second I have a revision on previous temps and stuff temps are out updating now
Secondary fan will run when
ECM has trouble codes (DTCs)14,15,52, or 62 (DTC= diagnostic trouble code)
ECT above 234deg. F
Engine above 235deg F
A/C high pressure switch signal from A/C fan switch
the earlier numbers bugged me and rite now I don't see were they came from, these numbers are post lunch not pre breakfast
Secondary fan will run when
ECM has trouble codes (DTCs)14,15,52, or 62 (DTC= diagnostic trouble code)
ECT above 234deg. F
Engine above 235deg F
A/C high pressure switch signal from A/C fan switch
the earlier numbers bugged me and rite now I don't see were they came from, these numbers are post lunch not pre breakfast
so, for what i understood, if everything works as it should, the secondary fan should not turn on by simply connecting A/C?
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Melting Slicks
Joined: May 2014
Posts: 2,878
Likes: 589
From: New Port Richey FL