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09-29-2003, 10:06 PM
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#1
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4th Gear Member
Join Date: May 2002
Location: Toronto, ON, Canada
Posts: 722
Car: 1988 Dinan M3
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Temp on on-board computer reads 50 Celsius
The on-board computer on my 325ix has been indicating an outside temperature of 50.0 degrees Celsius for a few weeks now. It stays at 50 regardless of what the actual temp is. What is causing this? Is it the outside temperature sensor at fault? The on-board computer module perhaps? I've simply ignored the fault in the past, but would like to have accurate temp readings now on since colder weather is coming. Anybody see this one before? 
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1988 BMW Dinan M3 2.6 Stage II
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09-29-2003, 11:08 PM
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#2
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6th Gear Member
Join Date: May 2002
Location: Barrie/Oakville
Posts: 2,003
Car: 1997 Jetta GLX VR6, 1998 BMW E36 323is {M52}(SOLD!), '04 e46 325iT (pops), '86 e30 325e {M20}(My Classic),
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It is probably the outside temperature sensor is pooched. My e30 stays at
-30.0°C all the time and it is busted.
Jay
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Past: 1998 323is (E36)
1986 325e (E30)
Present: 1997 Jetta GLX VR6
2004 325iT (E46) (pops)
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09-30-2003, 02:03 PM
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#3
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Moderator/Event-Coordinator
Join Date: Feb 2002
Location: Stance
Posts: 13,033
Car: S54 Z3M & 325iT/5
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I've seen mine read 54.5. Having the aux fan let go in a massive 401 traffic jam is NOT safe.
It's your sensor.
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10-01-2003, 11:54 AM
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#4
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4th Gear Member
Join Date: May 2002
Location: Toronto, ON, Canada
Posts: 722
Car: 1988 Dinan M3
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Yup, I better check the outside temp sensor first. I think it's a pretty cheap part too but I'm having a difficult time identifying the part no.
Mystikal, you got me a bit confused. You're suggesting the functioning of the aux fan is dependent on the outside temp sensor?
__________________
1988 BMW Dinan M3 2.6 Stage II
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10-02-2003, 12:19 PM
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#5
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Moderator/Event-Coordinator
Join Date: Feb 2002
Location: Stance
Posts: 13,033
Car: S54 Z3M & 325iT/5
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Quote:
Originally posted by jello_g
Mystikal, you got me a bit confused. You're suggesting the functioning of the aux fan is dependent on the outside temp sensor?
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Oh, no, I mean the heat from the engine actually caused the sensor to read that high. 
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10-02-2003, 11:44 PM
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#6
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is BMW crazy
Join Date: Sep 2002
Location: Thornhill
Posts: 15,554
Car: 2 X BMW M5
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Quote:
Originally posted by Jays_Arctic323is
It is probably the outside temperature sensor is pooched. My e30 stays at
-30.0°C all the time and it is busted.
Jay
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same here
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10-06-2003, 12:16 AM
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#7
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6th Gear Member
Join Date: May 2002
Location: Barrie/Oakville
Posts: 2,003
Car: 1997 Jetta GLX VR6, 1998 BMW E36 323is {M52}(SOLD!), '04 e46 325iT (pops), '86 e30 325e {M20}(My Classic),
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Yep, I gotta have a look at that, it is handy having an outside temp....Time to read the good old Hanes Manual!
__________________
Past: 1998 323is (E36)
1986 325e (E30)
Present: 1997 Jetta GLX VR6
2004 325iT (E46) (pops)
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10-06-2003, 12:48 AM
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#8
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4th Gear Member
Join Date: May 2002
Location: Toronto, ON, Canada
Posts: 722
Car: 1988 Dinan M3
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I've got the Bentley Service Manual for BMW 3-Series (E30), but nowhere in there does it explain how to replace the ambient temperature sensor. Does the Haynes cover this for the E30?
__________________
1988 BMW Dinan M3 2.6 Stage II
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10-17-2003, 08:27 PM
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#9
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4th Gear Member
Join Date: May 2002
Location: Toronto, ON, Canada
Posts: 722
Car: 1988 Dinan M3
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I've got a new sensor ready to replace the old. Now I just have to find where in the engine compartment this sucker goes. Anybody have a clue?
__________________
1988 BMW Dinan M3 2.6 Stage II
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10-17-2003, 11:39 PM
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#10
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Moderator/Event-Coordinator
Join Date: Feb 2002
Location: Stance
Posts: 13,033
Car: S54 Z3M & 325iT/5
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Quote:
Originally posted by jello_g
I've got a new sensor ready to replace the old. Now I just have to find where in the engine compartment this sucker goes. Anybody have a clue?
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Call Autotrend (BMW specialists) at 416-696-2277. Great guys, they'll fill you in.
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