Cooling fan problem
#1
Cooling fan problem
Do any of the S.A.M.s control the radiator fan? My indy shop said that the fan can be turned on by computer and operates at all speeds. There is no faults with the sensors or relays. I do have a malfunctioning S.A.M., could that be the problem?
#2
If the fan is on high all the time it usually means the ecu is water damaged
If you have a bad SAM I assume that too is water damaged
You'll probably need both a new ecu and SAM
If you have a bad SAM I assume that too is water damaged
You'll probably need both a new ecu and SAM
#3
Thanks,
#4
MBWorld Fanatic!
If the ECU isn't commanding the fan, you need to look at why. Is there a faulty engine temp sensor and it thinks it doesn't need the fan? Also, there should be a fan request PID in the data, see if the ECU is asking for the fan and not getting it, it should always go on when the a/c is active so it's simple to test. That should give you an idea of where in the chain the breakdown is.
#5
If the ECU isn't commanding the fan, you need to look at why. Is there a faulty engine temp sensor and it thinks it doesn't need the fan? Also, there should be a fan request PID in the data, see if the ECU is asking for the fan and not getting it, it should always go on when the a/c is active so it's simple to test. That should give you an idea of where in the chain the breakdown is.
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#8
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SL55, Opel GT, 70 LT-1, BMW 745 turbo, MRoadster, 49 Stude truck, 69 Z/28, Ferrari project
Without the A/C on, at what temp should the fan engage (factory settings)?
Just curious.
Just curious.
Last edited by LynnBilodeau; 03-09-2016 at 05:52 PM.
#9
MBWorld Fanatic!
My car heats up to 95C on the gauge before the fan kicks on if I don't have the a/c running.