2002 S4 Fans not turning on

[mattb]

Suspected my fans weren't working on my bike -- I hardly ever need them since if you're moving, the thing is getting plenty of air to run cool.  So I let my bike sit at a high idle and heat up until the temp gauge said "HI" -- never seen that before...

Anyone debugged similar issues?

thx

m

[TiAvenger]

Suspected my fans weren't working on my bike -- I hardly ever need them since if you're moving, the thing is getting plenty of air to run cool.  So I let my bike sit at a high idle and heat up until the temp gauge said "HI" -- never seen that before...

Anyone debugged similar issues?

thx

m

"HI" is a bad thing

bad switch possibly?

[mattb]

"HI" is a bad thing

bad switch possibly?

Yeah, "Hi" is obviously hot -- the fans should kick on well before this...  Yeah, I'll have to dig -- dunno where the switch even is.

m

[Howie]

There is a fuse just for the fans.  Check that first, cheap and easy.  Next likely suspect would be the fan switch located in the coolant union.  If you disconnect the sensor and bridge the connection at the harness end, the fans should run with the key on.  If so the switch is bad.  Test those first. 

[needtorque]

First is check the fuse.  The next easiest thing to do is jumper the fan straight to the battery or another 12v source and make sure the fan is actually working.  Then start working upstream to see where you are losing power.

[Speeddog]

If it's an OEM '02 ECU or an '02 spec DP ECU, then the fans are completely controlled by the ECU.

I'm 99% sure that '01 S4 had a fan relay.

Anyway, check to make sure the fans actually work, as needtorque said.

[mattb]

Yup, fuse it was...

[needtorque]

Glad it was the easy thing. 

[mattb]

Glad it was the easy thing. 

55 cent fix yo!