Cooling fan problem
Thread Starter
Newbie
Joined: Jan 2016
Posts: 9
Likes: 1
CL500, E430
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?
Thread Starter
Newbie
Joined: Jan 2016
Posts: 9
Likes: 1
CL500, E430
Thanks,
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
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.
Thread Starter
Newbie
Joined: Jan 2016
Posts: 9
Likes: 1
CL500, E430
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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Member
Joined: Dec 2011
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From: Guthrie, OK
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; Mar 9, 2016 at 05:52 PM.
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MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
My car heats up to 95C on the gauge before the fan kicks on if I don't have the a/c running.
