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Ls 400 Cooling Fan

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#1 Julian


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  • Lexus: UCF 11 Celsior LS 400 1990
  • Location: Please Select

Posted 30 January 2007 - 03:10 AM

My cooling fan has decided to run all the time
It is the fliud drive (coupling ) type. Has a pump and seperate resovior etc. with a large fan driven by a hydraulic motor.
Toyota don't know the answer only say "with soleniod disconnected fan stopped. Could be solenoid, ECU, Temp switch or wiring."
Has anyone any suggestions.

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#2 steve2006


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  • Name: Steve
  • Lexus: LS 400 Celsior Import
  • Year: 1994
  • Location: Derbyshire

Posted 30 January 2007 - 11:20 PM

Welcome to LOC.
Thought it was a funny time to post at 3.10am then realised the time difference in Tasmania.
I have looked at the wiring diagram and the common factor seems to be the water temp switch located on the bottom of the radiator.
If you have access to a multimeter check to see if it's short after disconnecting the 2 wires to it.
Good luck,

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