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1993 Acura Integra Cooling fans not turning on

Tiny
CULIACAN00
  • MEMBER
  • 1993 ACURA INTEGRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 227,000 MILES
Hi, I have a 1993 Acura Integra 1.8 engine, with a manual transmission. My problem is that my cooling fans will not turn on when the engine is hot. However, they do turn on when I use my a/c and I have also jumped the thermo switch to check if my fans turn on, which they do. I have replaced the thermo switch, temperature sending unit, coolant temperature sensor and thermostat. I have also tried bleeding the cooling system. Can a Fan timer control module be the problem? Any suggestions? Thank you for your time.
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Monday, April 20th, 2009 AT 4:12 PM

7 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
The switch you jumper to get fan to come on is it the ECT on front left side cylinder head? Have you change the Radiator fan relay right front behind head light near battery?
Let me know
Thanks for donate
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Tuesday, April 21st, 2009 AT 9:29 AM
Tiny
CULIACAN00
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  • 4 POSTS
The connector I jumped was the sensor attached to the thermostat housing. No, I have not changed the radiator fan relay.
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Tuesday, April 21st, 2009 AT 12:34 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Does sensor you jump have a Yellow green and a black wire attached?
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Tuesday, April 21st, 2009 AT 2:05 PM
Tiny
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  • 4 POSTS
Yes, that is correct.
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Wednesday, April 22nd, 2009 AT 1:53 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Think the ECT sensor is faulty. Need Ohm meter at 68 deg. There is 2000-4000 ohms at 176 deg. 200-300 ohms. Check across terminals of sensor.
Let me know what you get
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Wednesday, April 22nd, 2009 AT 3:48 PM
Tiny
CULIACAN00
  • MEMBER
  • 4 POSTS
Hi, so I replaced the thermo switch on the thermostat housing with a genuine honda part and still, fans will not turn on.
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Tuesday, April 28th, 2009 AT 2:23 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
When you jumper the thermister and fans work indicates the system is functuional. You see the resistence drops as temp goes up and grounds relay.
Did you ohm switch as I described?
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Wednesday, April 29th, 2009 AT 9:13 AM

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