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Overheating

Tiny
ILFFER2004
  • MEMBER
  • 2001 MITSUBISHI GALANT
Hi
i have sent this question and i cant reply the technical person
i have did a Donation
here is the Question :
http://www.2carpros.com/questions/2001-mitsubishi-galant-overheating
here is my reply which didnt appear

so what i should do ?
please note i changed the fans and the fan controller
another thing when i remove the coolant sensor plug i getting check engine light on the dashboard and the high speed come so i think this can tell me i have no issue with Fans , controller and relay
and as with AC they working fine this give me an extra point to tell me the fans and controller are ok and the AC relay as well
yes as you say i tested the voltage and i got around 6 volt power so were exactly my issue ? where i can find this resistance and how i can replace
appreciate your help and many thanks in advance


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Saturday, November 5th, 2011 AT 9:47 PM

8 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Was the coolant sensor replaced?
It could be working out of range and not working the fans when required.

A faulty PCM would cause the problems concerned.

Was anything done prior to this occurring?
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Sunday, November 6th, 2011 AT 4:01 AM
Tiny
ILFFER2003
  • MEMBER
  • 28 POSTS
Hi
i replaced it 2 times with no luck
this overheating killing me and it has a bad effect on the enging and ger
please please help me
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Sunday, November 6th, 2011 AT 1:34 PM
Tiny
ILFFER2003
  • MEMBER
  • 28 POSTS
Hi
what is the PCM
can you please help me and give me more details
the issue began after changing time belt, or maybe I have noticed this issue after changing the belt
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Sunday, November 6th, 2011 AT 1:47 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
PCM is the engine computer. You might have to substitute one to test.

Did you check the coolant level in the radiator?
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Sunday, November 6th, 2011 AT 9:15 PM
Tiny
ILFFER2003
  • MEMBER
  • 28 POSTS
Hi
yes I checked, and I have changed the radiator as well

i dont know how the fane second speed come I galant but I had a look at my fuse box and I saw there is relay fan and 50 amp fuse
i already changed the relay, do you think the fuse is defect? Or if I have a bad fuse the fans will not work at all?
The strange isse why they are worknig fine with AC
i can say maybe the AC realy has a control on fans so they are working with AC
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Sunday, November 6th, 2011 AT 10:16 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If they are working with the AC, it is not a power supply, grounding or relay issues.
This is a control problem issue and since you have replaced the coolant sensor, the next thing to test would be the PCM (ECU).
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Monday, November 7th, 2011 AT 7:31 AM
Tiny
ILFFER2003
  • MEMBER
  • 28 POSTS
How I can test ECU
and when I remove the coolant sensor the fans working as expected so do you think I have an issue with ECU?
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Monday, November 7th, 2011 AT 10:07 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
There is o way of testing the ECU for this problem. You can only substitute one to test.

We can only come to the conclusion that the ECU is the one at fault when all possible test had been performed.
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Tuesday, November 8th, 2011 AT 2:06 PM

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