Question about 1990 Lexus LS 400

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How do i check to see if i have a bad sensor or actuator in my 93 lexus ls 400. My air suspension is not working properly someties its up and then it goes back down. One of the other guys told me it may have a bad sensor or actuator. Where can I locate these parts and check to see if they are bad or not. Thanks maxx

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  • ermcash Nov 18, 2009

    Lexus 1993 ls400 air suspension rear where are the sensors located for replacement. I am having problems with my staying in nomal or sport mode. Everything works the motor and air bags but its real sensitive when I ride on uneven road. Level road they blow up a little, real high road they blow up alot, flat plain road I lose everything.Can you help?

  • ermcash Nov 19, 2009

    thanks

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idle air control valve is located behind the thermostat housing on the nose of the engine block. It is in line from right to left with the oil filler cap. There may be another air valve associated with the steering pump but it is not the "idle" air control valve (IACV). the air ride pump is located on the passenger side front of the engine compartment under the air filter housing. You also have to remove the right front tire and plastic wheel well inner cover to get to it and the valve for the front shocks. the air-filter is located The air filter is on the passenger side right behind the passenger head under the hood. To access it you must use have a socket wrench and a 10 mm socket.
1. Go to the driver side under the hood near the battery.In front of the battery there a then cover that you must lift up. Once you have lifted this cover, there is a silver screw that is holding the air cover directly over the radiator.Remove the cover and then loosen the screw to take the center air cover off from over the radiator.
2. While working your way to the right, you will notice there is another cover on the passenger side. Remove this cover and you will then see the air filter. The air filter is big round and has a latch. The only way that you can access the air filter is by removing the 3 screws that hold stable to the air induction which is connected to the throttle plate.
3. Remove these screws with the same 10 mm socket and also loosen the lowest clamp on the air induction so you can take just the air filter housing out. You may have to move back and forth to wiggle out.
4. Once you have wiggled out the air filter housing, you can unlatch the air filter and then replace.
5. Then reverse the instructions to reinstall.
The starter is located in the block. You need to take the intake manifold off to get to it
for fuel pump and relay location click this link directly
http://omgili.com/jmp/Mx2PHH_4C21ctwpM5gDXDFRUdU134o3brGoZyFeYld9iS6FS3Oj3CGURtqgfzxzYaxaaYYNmFFa5DITZrGa2.VW05BB51KkfOIG8H5LUKJY_9h78E4nh4Zgv5tu8TJKeSqjGl0QV24m9MvCl5ZFW_YKnuA.Ol1MyrkV8QrrrpGOFEY8qb9JTHy9S8FccRAr6lolsQFVR1e5V0Y7XKhu0YJ778j.WjCIfIDKKoy2RIF0R_ZNzt5CcqhI0IeLjD5PR
in the link check out the pictures of the fuel pump and relay in the lower end of the page.
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.

Posted on Nov 18, 2009

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You can get the kit from a place like this:


http://www.strutmasters.com/lexus-ls400-suspension-s/102.htm


As far as being able to tell what part is bad... are you extremely mechanically inclined and have repaired cars before? If you know how to replace the suspension I would imagine you would know how to make sure the actuators are bad.

Posted on Nov 16, 2009

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just purchased a 1991 lexus LS400....

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spacecoastsailing@yahoo.com


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