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Engine overheating

Tiny
URSULOROBLES
  • MEMBER
  • 2009 HONDA CRV
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
The vehicle is overheating. The temperature reaches over half of indicator, close to 3/4 in hot side of gauge and the cooling fan does not come on.
Tuesday, November 7th, 2017 AT 8:03 PM

7 Replies

Tiny
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  • MECHANIC
  • 31,937 POSTS
Quick check; look at the cooling fan relay, swap it with another relay it is number 9 in the relay box, just make sure that it s a non essential circuit that you can isolate for a quick test drive, and it is the same configured relay.
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Wednesday, November 8th, 2017 AT 1:33 AM
Tiny
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I replaced the number 9 relay with a new one. I had the vehicle running for at least thirty minutes and the temperature went over half and no cooling fan came on. What else can I check?
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Wednesday, November 8th, 2017 AT 12:55 PM
Tiny
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Check the power supply to the relay and trip it out and see if the fan actually comes on, you may have a faulty fan. I will go back and see where the sensor is that turns on the relay, I will re post soon.
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Wednesday, November 8th, 2017 AT 2:12 PM
Tiny
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Okay, thanks.
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Thursday, November 9th, 2017 AT 4:52 AM
Tiny
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There is a fan diode in the under hood relay box, and two sensors as per pic, I hope this helps as well.
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Saturday, November 11th, 2017 AT 3:33 AM
Tiny
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Hi,
The a/c pressure sensor sends correct reading (s) to the fuse in engine compartment to turn on the a/c cooling radiator fan. Where are the Ect sensor 1 and 2 located?
Thanks.
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Monday, November 13th, 2017 AT 8:56 AM
Tiny
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As pic says, one at bottom of radiator and one at rear of engine, I have no actual pic of the exact location, you should be able to see the wiring and locate the sensor that way.
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Monday, November 13th, 2017 AT 1:25 PM

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