Question about 1990 Lexus LS 400

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I just purcgased a 1990 Lexus ls 400 and the coolant light came on it has a full tank of coolant is this a bad sessor or what?

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  • burburdaddy
    burburdaddy Mar 27, 2012

    The sending unit is at the top,And not the bottom it acts as float like that in a toilet bowl,You have to take rubber cover off with wires going through top and use channel pliers to take a loose,I had the same problem,got one off one at salvage yard relaced and light went out,some people should'nt respond if they truly don't know the answer.....

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  • Master
  • 1,033 Answers

It does sound like the sensor is either dirty inside the tank or bad. You will have to remove the overflow tank and the sensor is torward the bottom of the tank and easily replaced.

Posted on Sep 09, 2010

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Posted on Jan 02, 2017

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1 Answer

How to fix the coolant warning on a 1990 lexus400


If u have repaired coolant problem and light well not reset. Problem is not fixxed then. Look for something minor like cap on not holding correct pressure overflow tank has a sensor inside that may be bad.

Jun 03, 2014 | 1990 Lexus LS 400

1 Answer

I HAVE A WARNING LIGHT ICON ON AT THE BOTTOM LEFT OF MY DASHBOARD IT LOOKS LIKE A CROWN OR A CIRCLE WITH SPACES IN BETWEEN. THE COLOR OF THE ICON IS ORANGE. ITS A LEXUS 1990 LS 400


I believe what this symbol is the radiator. It comes on when the coolant level is low. Take a look at your radiator coolant level and if low add some to the full mark. Do this when the engine is cold to avoid getting burned from hot water and steam.

Jun 07, 2011 | 1990 Lexus LS 400

1 Answer

Where is the fuel pump on a 1994 lexus ls 400?


The fuel pump is inside gas tank behind the back seat unscrew the only top that's there and it is inside the gas tank. You will have to remove your back seat to gain access to fuel pump. Fuel tank is located in trunk. No need to take fuel tank down. Click this link for full details and procedures:--- http://technoanswers.blogspot.com/2011/06/how-to-replace-fuel-pump-on-lexus-ls.html ----------- For fuel filter replacing, click this link:--- http://technoanswers.blogspot.com/2011/06/how-to-replace-fuel-filter-1994-lexus.html ----------- For timing belt and water pump removal and installation, click this link below:-- http://technoanswers.blogspot.com/2011/06/how-to-change-timing-belt-and-water.html ------------ For coolant flushing and filling, click the link below:-- http://technoanswers.blogspot.com/2011/06/how-to-drain-and-fill-coolant-on-lexus.html -------------- This all procedures should help.Thanks.Helpmech.

Jun 02, 2011 | 1994 Lexus LS 400

1 Answer

I have a 1990 Lexus LS 400 and I was told the alternator is the problem....The lights, radio, and tail-lights do not work (Nothing electrical even with a new battery). Could this be the only problem??...


I would inspect your wires at the starter. If you live up north then corrosion is bad, clean all wires going to starter. then clean wires to back of alternator. I seriously doubt that alternator is the problem, but if you remove it you can have it tested for free at most parts stores.

Feb 13, 2010 | 1990 Lexus LS 400

1 Answer

What size gas tank does 1990 lexus ls 400 have?


Fuel tank: 22.5 Gls.

More details in Lexus LS400

I hope helps with this (remember rated this help) Good luck.

Jan 04, 2010 | 1990 Lexus LS 400

3 Answers

DASH LIGHT


Coolant level is low

Jun 19, 2009 | 1990 Lexus LS 400

1 Answer

How tel if waterpump is bad


I have just replaced the timing belt only to find that the spark has dissapeared since before I began

Mar 25, 2009 | 1990 Lexus LS 400

1 Answer

All dash warning lights came on while driving. oil light, brake light, coolant light, battery light. car continued to run. once home turned off and now wont start. warning lights still come on and car...


Hatterasnc,

You're alternator has gone bad and the vehicle was running on battery power. The "clicking" sound is your now dead battery that does not have enough power to turn over the starter. You might also want to check your power steering pump for leak. This is a know problem with early LS400s and will most likey be the cause of the alternator failure. I just dropped $1050.00 to fix the very same promblems you have.

Jul 21, 2008 | 1990 Lexus LS 400

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