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1989 Toyota Corolla Cooling fan is on constantly

Tiny
DEVO357
  • MEMBER
  • 1989 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 197,000 MILES
My cooling fan is on right from start up when cold and does not turn off? I also have a check engine light that popped up and I think its related.
Friday, August 27th, 2010 AT 10:40 AM

9 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Coolant temp. Sensor most likely fault but will want to retrieve the trouble code(s) stored to make sure
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Friday, August 27th, 2010 AT 5:52 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Jumper Te-1 to E-1 in the check connector to flash the code/s
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Friday, August 27th, 2010 AT 5:57 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
There is a small white round connector under dist. In coolant block, this is fan switch.

Either fan switch is bad or relay is stuck. Check connection to fan switch.

Check fan relay's and "engine main" relay.
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-1
Saturday, August 28th, 2010 AT 8:12 AM
Tiny
DEVO357
  • MEMBER
  • 5 POSTS
If I forgot to mention this motor has a carburetor
Here are the code I pulled.

22
31
41
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Monday, August 30th, 2010 AT 11:23 AM
Tiny
GEET
  • MEMBER
  • 34 POSTS
22 is for coolant temperature sensor
31 is for vacuum sensor
41 is for throttle position sensor
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Monday, August 30th, 2010 AT 11:41 AM
Tiny
DEVO357
  • MEMBER
  • 5 POSTS
Hmm I dont see how 41 is TPS the motor has a carburetor.

So what do I need to do to get rid of these codes?
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Monday, August 30th, 2010 AT 2:25 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Disconnect the battery (-) for 5 minutes to erase codes, if they come back on, then further repair is necessary.
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Tuesday, August 31st, 2010 AT 8:22 AM
Tiny
GEET
  • MEMBER
  • 34 POSTS
If they come back you have to change the sensor. Its weird you have carburetor and it stores code 41.
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Tuesday, August 31st, 2010 AT 12:43 PM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
It is also possible the ECM is bad, or that some 89's had FI but used a common ECM with a different PROM.
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Wednesday, September 1st, 2010 AT 7:25 AM

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