FAN1 vs FAN2?
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Re: FAN1 vs FAN2? (gbody5)
Fan 1 is the fan behind your radiator OR the LEFT/Drivers side fan if both are mounted behind the radiator.
Fan 1 comes on FIRST when the engine temp gets to the Fan 1 turn on temp.
Fan 2 comes on if Fan 1 doesn't provide enough cooling to keep the engine temp from getting to the Fan 2 turn on temp.
Hope I didn't confuse you. I think I did me.
Fan 1 comes on FIRST when the engine temp gets to the Fan 1 turn on temp.
Fan 2 comes on if Fan 1 doesn't provide enough cooling to keep the engine temp from getting to the Fan 2 turn on temp.
Hope I didn't confuse you. I think I did me.
Pro
Joined: Nov 1999
Posts: 623
Likes: 0
From: Toronto, ON, Canada
Re: FAN1 vs FAN2? (gbody5)
I thought the Aux fan (FAN2) in front was controlled by a switch in the cyl head. Is this parameter just not used in my application?
Racer
Joined: Jul 2002
Posts: 401
Likes: 1
From: Aptos CA
Re: FAN1 vs FAN2? (XTwinTurbo)
My 90 is ECM controlled. What is the broadcast code on your ECM? Someone here has a match, I am sure. If it has a second fan thermostat, it should be on the engine left side between cyl 1&3.
Thread Starter
Pro
Joined: Sep 2001
Posts: 542
Likes: 1
From: Stuck in the 80's
Re: FAN1 vs FAN2? (Skippy Stone)
I'll get into my ECM tonight to see what broadcast code I have. I did notice via a different .ecu file that the same parameters were differentiated by whether the A/C was off or on.
Thanks,
Thanks,
