Discussion:
2000 LS400 questions
(too old to reply)
Erik Rudbeck
2007-05-09 20:27:13 UTC
Permalink
Five months ago I bought a 2000 LS400 with 185,000 km (aprx. 115,000 miles)
on the odometer.

Here in Denmark Lexus is a rare automobile. We have two (2) authorized
dealers in the entire country!
I got the car from one of these dealers. I'm the second owner, and the same
dealer sold the car as new, and has carried out all service and maintenance
on the car since new.

It is well maintained, and basically drives wery well.

However. I have two issues with the car, that seems to puzzle the dealer:

1. It is very sensitive to cross winds.
Unlike any other car I've had (among others two Camry V6), this Lexus
requires a lot of steering in windy conditions.
Especially at higher speeds (80-100 mph). Having the wind in from the side,
and passing trucks can force the car to almost change lane.

The dealer have checked the car, but found nothing he says. The car is
equipped with air suspension, and I have noticed that it is not quite at
level when parked and looked at from behind (little over half an inch). The
local Toyota shop here in town had a look at it, and tried to adjust on of
the rear sensors, but it didn't appear to change anything. They advised me
to take it to Lexus.
Perhaps this could have something to do with the wind sensivity?

I can se from other posts, that the air suspension on this car is not very
reliable. How would a problem with the air suspension show itself?

2. Transmission hesitation
My car has a problem with rolling starts, exactly as described in this quote
from another posting regarding an ES300:

Quote
I also notice it when doing the "California roll", or turning a hard corner
without ever coming to a complete stop. The tranny gets confused, and I
either sit and wait for it to accelerate, or I have to press the pedal down
farther, causing the engine to race.
Unquote

On the internet I found out how to reset the transmission memory (disconnect
the negative terminal on the battery for 5 minutes), and this cures the
problem for the next few days. Then it returns gradually as the transmission
memory gets refilled with data - I guess.

The Lexus dealer here in Denmark had never heard of the problem, not on any
Lexus model, and he didn't know of any software update for my car, or
whether it could be updated at all. He's been 'investigating' the matter now
for 14 days.

With so few Lexus cars on the road here, I guess our mechanincs never build
up a deeper technical knowledge about these cars.

I would very much appreciate if anybody have information or comments to
these issues. I expect that this authorized 'we-cannot-find-anything-wrong'
Lexus dealer will need a little pushing.

Thanks
Erik Rudbeck
Denmark
Ray O
2007-05-09 23:15:10 UTC
Permalink
Post by Erik Rudbeck
Five months ago I bought a 2000 LS400 with 185,000 km (aprx. 115,000
miles) on the odometer.
Here in Denmark Lexus is a rare automobile. We have two (2) authorized
dealers in the entire country!
I got the car from one of these dealers. I'm the second owner, and the
same dealer sold the car as new, and has carried out all service and
maintenance on the car since new.
It is well maintained, and basically drives wery well.
1. It is very sensitive to cross winds.
Unlike any other car I've had (among others two Camry V6), this Lexus
requires a lot of steering in windy conditions.
Especially at higher speeds (80-100 mph). Having the wind in from the
side, and passing trucks can force the car to almost change lane.
The dealer have checked the car, but found nothing he says. The car is
equipped with air suspension, and I have noticed that it is not quite at
level when parked and looked at from behind (little over half an inch).
The local Toyota shop here in town had a look at it, and tried to adjust
on of the rear sensors, but it didn't appear to change anything. They
advised me to take it to Lexus.
Perhaps this could have something to do with the wind sensivity?
I can se from other posts, that the air suspension on this car is not very
reliable. How would a problem with the air suspension show itself?
2. Transmission hesitation
My car has a problem with rolling starts, exactly as described in this
Quote
I also notice it when doing the "California roll", or turning a hard
corner without ever coming to a complete stop. The tranny gets confused,
and I either sit and wait for it to accelerate, or I have to press the
pedal down farther, causing the engine to race.
Unquote
On the internet I found out how to reset the transmission memory
(disconnect the negative terminal on the battery for 5 minutes), and this
cures the problem for the next few days. Then it returns gradually as the
transmission memory gets refilled with data - I guess.
The Lexus dealer here in Denmark had never heard of the problem, not on
any Lexus model, and he didn't know of any software update for my car, or
whether it could be updated at all. He's been 'investigating' the matter
now for 14 days.
With so few Lexus cars on the road here, I guess our mechanincs never
build up a deeper technical knowledge about these cars.
I would very much appreciate if anybody have information or comments to
these issues. I expect that this authorized
'we-cannot-find-anything-wrong' Lexus dealer will need a little pushing.
Thanks
Erik Rudbeck
Denmark
A problem with the air suspension usually results in the car sagging in one
or more corners. If the compressor is working properly, the car will
self-level after the engine is running.

I never had a problem with stability at highway speeds or with cross-winds
in my 2000 LS 400 with air suspension (U.S. spec). Check the tires to make
sure there is sufficient tread remaining (at least 2 mm), that there are no
broken belts in the tire, that the tread is wearing evenly. If all appears
to be OK, then have the alignment checked, particularly the caster
specification.

I also did not have any problems with the transmission, and there have not
been many complaints about the LS 400 transmission. Most of the complaints
have been for other models. Check the transmission throttle cable for
proper adjustment, and if premium fuel is specified for your car and you are
not using premium, try switching to premium fuel.
--
Ray O
(correct punctuation to reply)
Erik Rudbeck
2007-05-10 08:35:30 UTC
Permalink
Post by Ray O
Post by Erik Rudbeck
Five months ago I bought a 2000 LS400 with 185,000 km (aprx. 115,000
miles) on the odometer.
Here in Denmark Lexus is a rare automobile. We have two (2) authorized
dealers in the entire country!
I got the car from one of these dealers. I'm the second owner, and the
same dealer sold the car as new, and has carried out all service and
maintenance on the car since new.
It is well maintained, and basically drives wery well.
1. It is very sensitive to cross winds.
Unlike any other car I've had (among others two Camry V6), this Lexus
requires a lot of steering in windy conditions.
Especially at higher speeds (80-100 mph). Having the wind in from the
side, and passing trucks can force the car to almost change lane.
The dealer have checked the car, but found nothing he says. The car is
equipped with air suspension, and I have noticed that it is not quite at
level when parked and looked at from behind (little over half an inch).
The local Toyota shop here in town had a look at it, and tried to adjust
on of the rear sensors, but it didn't appear to change anything. They
advised me to take it to Lexus.
Perhaps this could have something to do with the wind sensivity?
I can se from other posts, that the air suspension on this car is not
very reliable. How would a problem with the air suspension show itself?
2. Transmission hesitation
My car has a problem with rolling starts, exactly as described in this
Quote
I also notice it when doing the "California roll", or turning a hard
corner without ever coming to a complete stop. The tranny gets confused,
and I either sit and wait for it to accelerate, or I have to press the
pedal down farther, causing the engine to race.
Unquote
On the internet I found out how to reset the transmission memory
(disconnect the negative terminal on the battery for 5 minutes), and this
cures the problem for the next few days. Then it returns gradually as the
transmission memory gets refilled with data - I guess.
The Lexus dealer here in Denmark had never heard of the problem, not on
any Lexus model, and he didn't know of any software update for my car, or
whether it could be updated at all. He's been 'investigating' the matter
now for 14 days.
With so few Lexus cars on the road here, I guess our mechanincs never
build up a deeper technical knowledge about these cars.
I would very much appreciate if anybody have information or comments to
these issues. I expect that this authorized
'we-cannot-find-anything-wrong' Lexus dealer will need a little pushing.
Thanks
Erik Rudbeck
Denmark
A problem with the air suspension usually results in the car sagging in
one or more corners. If the compressor is working properly, the car will
self-level after the engine is running.
I never had a problem with stability at highway speeds or with cross-winds
in my 2000 LS 400 with air suspension (U.S. spec). Check the tires to
make sure there is sufficient tread remaining (at least 2 mm), that there
are no broken belts in the tire, that the tread is wearing evenly. If all
appears to be OK, then have the alignment checked, particularly the caster
specification.
I also did not have any problems with the transmission, and there have not
been many complaints about the LS 400 transmission. Most of the
complaints have been for other models. Check the transmission throttle
cable for proper adjustment, and if premium fuel is specified for your car
and you are not using premium, try switching to premium fuel.
--
Thanks for your reply Ray.

When I got the car, I had a local tire shop install quality Goodyear winter
tires in the cars original size.
The dealer acknowledged the instability problem, but said that when they
couldn't find anything wrong, it might be due to the tires. I doubt it, but
currently I'm awaiting delivery of a complete new set of summer wheels (with
Bridgestone tyres), so I will just wait and see.

They did make a 4-wheel alignment during trouble shooting, and found nothing
off spec. I guess this includes camber and caster check as well.

Regarding the transmission
There are some reports on the internet about transmission hesitation on the
LS400. I wonder why some have it and others do not. I'm sure you would
notice it if you drove my car. In Denmark we have 92 and 95 octane gasoline
available. I use 95 which I belive at least matches the octane rating of
premium gas in the US.

Would you say, that I should check the transmission throttle cable
eventhough I can make the problem go away by resetting the ECM memory
according to a TSB I found?

/ Erik Rudbeck
Ray O
2007-05-10 14:58:59 UTC
Permalink
Post by Erik Rudbeck
Post by Ray O
Post by Erik Rudbeck
Five months ago I bought a 2000 LS400 with 185,000 km (aprx. 115,000
miles) on the odometer.
Here in Denmark Lexus is a rare automobile. We have two (2) authorized
dealers in the entire country!
I got the car from one of these dealers. I'm the second owner, and the
same dealer sold the car as new, and has carried out all service and
maintenance on the car since new.
It is well maintained, and basically drives wery well.
1. It is very sensitive to cross winds.
Unlike any other car I've had (among others two Camry V6), this Lexus
requires a lot of steering in windy conditions.
Especially at higher speeds (80-100 mph). Having the wind in from the
side, and passing trucks can force the car to almost change lane.
The dealer have checked the car, but found nothing he says. The car is
equipped with air suspension, and I have noticed that it is not quite at
level when parked and looked at from behind (little over half an inch).
The local Toyota shop here in town had a look at it, and tried to adjust
on of the rear sensors, but it didn't appear to change anything. They
advised me to take it to Lexus.
Perhaps this could have something to do with the wind sensivity?
I can se from other posts, that the air suspension on this car is not
very reliable. How would a problem with the air suspension show itself?
2. Transmission hesitation
My car has a problem with rolling starts, exactly as described in this
Quote
I also notice it when doing the "California roll", or turning a hard
corner without ever coming to a complete stop. The tranny gets
confused, and I either sit and wait for it to accelerate, or I have to
press the pedal down farther, causing the engine to race.
Unquote
On the internet I found out how to reset the transmission memory
(disconnect the negative terminal on the battery for 5 minutes), and
this cures the problem for the next few days. Then it returns gradually
as the transmission memory gets refilled with data - I guess.
The Lexus dealer here in Denmark had never heard of the problem, not on
any Lexus model, and he didn't know of any software update for my car,
or whether it could be updated at all. He's been 'investigating' the
matter now for 14 days.
With so few Lexus cars on the road here, I guess our mechanincs never
build up a deeper technical knowledge about these cars.
I would very much appreciate if anybody have information or comments to
these issues. I expect that this authorized
'we-cannot-find-anything-wrong' Lexus dealer will need a little pushing.
Thanks
Erik Rudbeck
Denmark
A problem with the air suspension usually results in the car sagging in
one or more corners. If the compressor is working properly, the car will
self-level after the engine is running.
I never had a problem with stability at highway speeds or with
cross-winds in my 2000 LS 400 with air suspension (U.S. spec). Check the
tires to make sure there is sufficient tread remaining (at least 2 mm),
that there are no broken belts in the tire, that the tread is wearing
evenly. If all appears to be OK, then have the alignment checked,
particularly the caster specification.
I also did not have any problems with the transmission, and there have
not been many complaints about the LS 400 transmission. Most of the
complaints have been for other models. Check the transmission throttle
cable for proper adjustment, and if premium fuel is specified for your
car and you are not using premium, try switching to premium fuel.
--
Thanks for your reply Ray.
When I got the car, I had a local tire shop install quality Goodyear
winter tires in the cars original size.
The dealer acknowledged the instability problem, but said that when they
couldn't find anything wrong, it might be due to the tires. I doubt it,
but currently I'm awaiting delivery of a complete new set of summer wheels
(with Bridgestone tyres), so I will just wait and see.
They did make a 4-wheel alignment during trouble shooting, and found
nothing off spec. I guess this includes camber and caster check as well.
A proper 4-wheel alignment shuld include checking camber and caster checks.
Hopefully, the new tires will solve the problem.
Post by Erik Rudbeck
Regarding the transmission
There are some reports on the internet about transmission hesitation on
the LS400. I wonder why some have it and others do not. I'm sure you would
notice it if you drove my car. In Denmark we have 92 and 95 octane
gasoline available. I use 95 which I belive at least matches the octane
rating of premium gas in the US.
Would you say, that I should check the transmission throttle cable
eventhough I can make the problem go away by resetting the ECM memory
according to a TSB I found?
/ Erik Rudbeck
I am not sure if the 2000 LS 400 had the "adaptive learning" feature, and
most of the hesitation complaints I've seen are for cars equipped with that
feature. TSB's issued by Toyota used programming upgrades, check the
throttle cable, and recommendations to use premium fuel to reduce the
hesitation. Since the hesitation complaints are not universal - not all
drivers experience the problem, I think the problem may be related to
driving conditions and/or driving habits and the computer's inability to
adapt to certain conditions or driving habits. Hopefully, your dealer can
resolve the hesitation issue.
--
Ray O
(correct punctuation to reply)
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