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Lexus LS 460 Suggested Improvements

60 messages,  Last post on Sep 17, 2010 at 9:05 AM

You are in the Lexus LS 460/460L Forum.

What is this discussion about? Lexus LS 460, Sedan

Messages Page 4 of 6

#31 of 60 Re: Rear side air bags [knowspinzone] by 150mphclub

Apr 13, 2007 (6:04 am)

Replying to: knowspinzone (Apr 12, 2007 2:20 pm)
That's the point. I would expect to pay extra on a $21,000 car, but not on a $61,000 car.

#32 of 60 Anti battery drain feature by rennybosch

May 28, 2007 (3:00 pm)

If you accidentally leave a door ajar, or even the trunk lid not quite closed, the headlights will remain on until the battery is dead. Here is my suggested improvement: Install some logic in the electronic vehicle control system that turns the headlights off when the battery voltage falls below a safe level. Also turn off any other battery drains. If you (Lexus) can think of any situations in which this would be undesirable, then provide a mechanism for overriding this feature, but let the default be to protect the battery.
 
Does any car provide this feature?

#33 of 60 Re: Anti battery drain feature [rennybosch] by nvbanker

May 28, 2007 (8:12 pm)

Replying to: rennybosch (May 28, 2007 3:00 pm)

Does any car provide this feature?
 
Ford has had that for years. After 10 minutes, if there is an abnormal drain on the battery, inside light left on, for instance, the Body Control Module cuts power to all auxiliary functions (leaving power to clocks, alarm, etc.) until the car is unlocked - when all power is restored. Not an original idea, but a good one, and I too wonder why my Explorer has this - but my Lexus doesn't

#34 of 60 Re: Remote Engine Start [rennybosch] by fun1

Jun 01, 2007 (3:14 pm)

Replying to: rennybosch (Oct 27, 2006 6:19 pm)
I have had after market remote start on my LS430 '05, since i purchase it. I can start the car from several floors above. But sine having this feature, simply haven't used it much. The annoying part with remote start is you dont have to insert the key and sometimes in valet parking you forget to give the key to valet. Also the Lexus remote entry key has to be reprogrammed via third part/dealership and you have to use an addtional remote to open and shut the doors. So essentially the first press on unlock, unlocks the drivers side, the second press unlocks the rest of the car and the third press starts the engine. I so like my '05 that am in no rush to get the 460. The 460 did not seem to have as comfortable a ride as LS430, aslo visually seems smaller
 
Sam
 
Sam

#35 of 60 Re: Remote Engine Start [fun1] by rennybosch

Jun 01, 2007 (3:42 pm)

Replying to: fun1 (Jun 01, 2007 3:14 pm)
Sam, that's fascinating. I had no idea there was an after market remote start available. My LS430 is an 04 but that is probably similar enough to the 05 so that the same feature should work for me. What is the name of the company that does this? Also, is there any problem with Lexus such as voiding a warranty or the like?
 
Thanks for the info.
 
Renny

#36 of 60 Re: Anti battery drain feature [nvbanker] by roddmod11

Aug 26, 2007 (3:00 pm)

Replying to: nvbanker (May 28, 2007 8:12 pm)
If you have a 460 it does,read your manual.

#37 of 60 Re: Anti battery drain feature [roddmod11] by sidgriggs

Aug 26, 2007 (3:15 pm)

Replying to: roddmod11 (Aug 26, 2007 3:00 pm)
Where in the Manual--I just tried to look it up (I Have an LS460)

#38 of 60 Re: Anti battery drain feature [sidgriggs] by roddmod11

Aug 26, 2007 (4:12 pm)

Replying to: sidgriggs (Aug 26, 2007 3:15 pm)
Pg 407 I have a more detailed pdf but Edmunds wont upload it, it refers to shutting systems down as the battery gets close to 10 volts so the car will still start.
 
ELECTRIC POWER CONTROL SYSTEM
DESCRIPTION
 The electric power control system is provided to supply power constantly to the vehicle equipped with
many electronic systems.
 The electric power control ECU always monitors the battery condition. In accordance with the battery
condition, the electric power control ECU implements various control measures on systems that operate
while the vehicle is parked or systems that require a large amount of power in a short period of time.
 System Image 
Charging Control
Outputs the charging control request to the ECM in accordance with
the battery status.
Load Control
Limits the operation of the ECU in order to suppress discharge of the
battery and voltage drop.
Control While Parked
Cuts parasitic current of switches in order to prevent the battery from
being degraded while the vehicle is parked for a long period of time.
 
2. Charging Control
General
This control lowers the generated voltage when the vehicle is idling or is being driven at a constant speed,
and raises the generated voltage when the vehicle is decelerating. This reduces the load on the engine as
a result of the electric generation of the generator, thus contributing to the fuel economy of the engine.
During acceleration, this system regulates the generated voltage in order to place the amperage estimation
value close to the target value.
 This system consists primarily of ECM, generator, electric power control ECU, battery current sensor,
and battery temperature sensor.
 The electric power control ECU detects the state of charge and discharge of the battery based on battery
voltage and the signals from the battery current sensor and battery temperature sensor. Then, it calculates
the accumulated amperage and sends a charging control request signal to the ECM.
 Based on the charging control request signal from the electric power control ECU, the signals from
various sensors and switches, and the charging state signal from the generator, ECM outputs signals to
the generator (IC regulator). Thus, the ECM controls the generated voltage to be optimal for the driving
condition.
 Under the following conditions, the electric power control ECU sends a request signal to the ECM so
that the ECM stops charging control and switches the generator to normal power generation mode.
- Various electrical loads are input.
- Failures of various sensors and switches are detected.
 
This is no German or American junk.

#39 of 60 Re: Anti battery drain feature [roddmod11] by pat

Aug 27, 2007 (6:16 am)

Replying to: roddmod11 (Aug 26, 2007 4:12 pm)
If you can convert the pdf to a jpeg, you can upload it to your CarSpace page.

#40 of 60 ETA display in Nav system by rennybosch

Sep 21, 2007 (1:14 pm)

It would be nice to have an ETA (Estimated Time of Arrival) display on the navigation screen. It's obviously very easy to calculate, since the nav computer already knows (and displays) time-to-arrival, and it knows current time (or it can get it from the rest of the car data base). The only challenge is to find room in the display for another 6-character entry (eg. 12:34p) plus a label for it, without robbing the display of valuable navigation data.
 
Of course having the time-to-arrival, we can ourselves add that to the current time, but on a car like this, should we have to do mental arithmetic? Also, observing the ETA over a longer period and noting whether it is staying approximately constant or advancing or retarding, would give us a little extra information.

Messages Page 4 of 6

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