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1990LS400 last won the day on February 5

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About 1990LS400

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  1. Although I've been active on this forum for many years, its activity level has dramatically declined. I suggest you ask your question on the much more active Club Lexus forum at https://www.clublexus.com/
  2. I wonder if the traction battery or a related component is going bad. I assume the traction battery is used to start the internal combustion engine of the RX400h like it is on other hybrid vehicles made by Toyota. And how old is the regular 12V battery? Does it test OK? Even through it isn't used to start the internal combustion engine, it's critical in powering the vehicle's electric infrastructure ... gauges, audio system, accessories, etc. I doubt if the brake code has anything to do with the problem. Sometimes meaningful codes trigger others that aren't.
  3. I don't see changing the transmission and differential fluid in the maintenance schedule for the 2008 LS460. Lexus dealers like to make money by doing unnecessary services which was one of the reasons I rarely used Lexus dealers for service during my 24 years of driving LS sedans. I see that engine coolant (120 months) and brake fluid (180 months) could be past due or due to be changed based on time instead of mileage. If you are going to be conservative, those might be services to have performed ... or maybe not. Ask the dealer service writer where in the heck something called induction system cleaning is specified in the maintenance manual. That sounds like a totally bogus trumped up service. Here's a link to the maintenance manual for the 2008 LS460: https://drivers.lexus.com/t3Portal/document/omms-s/L-MMS-08LS460/pdf/L-MMS-08LS460.pdf
  4. I would be surprised if a hitch ever becomes available from Lexus USA. They usually supply hitches at the time a vehicle is introduced as they did with the UX in the U.K. and the NX and RX in the U.S. Maybe an aftermarket hitch will eventually become available but the UX is selling in pretty low numbers ... only a little over 16,000 in 2019 - might not be cost effective for an aftermarket hitch company for such a low volume vehicle. I don't like carrying bikes on a roof either but I've sometimes done it. I carried bikes on the room of a Mercedes for 11 years since a receiver hitch wasn't available and I wasn't about to trash the trunk lid with a trunk lid mount bike rack. I now check on hitch availability before I buy a vehicle. I even installed a 1 1/4 inch receiver hitch on my wife's Prius so she could plug in a 2-bike rack. I'm planning to buy a 2-seat sports car next summer for which neither a roof rack or receiver hitch is available. Although I'll buy the car even if I can't carry bikes on it, I'm already investigating having a class I 1 1/4 inch receiver hitch fabricated for it.
  5. I've never heard of a Toyota/Lexus navigation system using two map DVD's at the same time. The final map DVD's for the 2002-2004 SC430 were the ones that were made available in 2013. The part numbers for the ones from 2013 are: PT219-GN23W-13 (for West of the Mississippi River) PT219-GN23E-13 (for East of the Mississippi River) The -13 in the part number refers to the publication year (2013). The 23 in the part number refers to the DVD being for navigation generations 2 and 3. Maybe the trunk mounted map DVD reader isn't the problem. The problem could be in the in-dash navigation head unit or in an electrical connection between the two units. I've found that Lexus dealers have little interest in repairing older cars. Their technicians seems to be familiar only with current models and no one wants to crack a manual to see how to repair the older ones. It's almost seemed like a strategy to get customers to buy newer cars. If you want to further investigate the problem yourself, you could subscribe to the Toyota technical information website which should have information on how to diagnose the problem: https://techinfo.toyota.com/
  6. The mirrors should tilt downward when you shift into Reverse and return to their normal position when you shift back into Drive. Have you tried to tilt the mirrors downward with the mirror control switch while you are in reverse? Wondering if that might reset them.
  7. It's as if some of the personalized settings have become lost. Normally these settings on the LS430 can be modified using hardware/software connected to the diagnostic port under the dashboard. You could have a Lexus dealership try to set them the way you want but they might not "stick" due to what sounds like some sort of electrical problem in the vehicle ECU where the settings are stored. The driver's door seems to be working as designed. I don't think there is a way to make all the doors unlock when the inside driver door handle is pulled. There is a setting that causes all the doors to unlock after shifting into Park. The following ancient thread has a list of settings that can be customized:
  8. Well ,,, it's possible that the problem could be in the radio head unit since that is what sends the audio signals to the amplifier. When I had low volume on a Nakiamichi system in a 2000 LS400 a long time ago, the problem was in the in-dash head unit - fixed by a Florida company. When a friend had similar low volume in a 1999 LS400, the problem was an old defective phone ECU that was grounding out and muting the audio system. Uninstalling the phone ECU solved that one. Does your RX happen to have an old Lexus phone system?
  9. My suggestion is to avoid using fuel additives or randomly replacing things and to take your RX to a Lexus dealership for an evaluation. 115000 km is quite low. We have a heavier Toyota Sienna Limited van that has the same engine and transmission as your RX. It is at 95,000 miles (about 153,000 km), runs perfectly and averages from 18 to 24 miles per gallon (13.1 to 9.8 L/100km). It has been maintained according to the maintenance schedule. We live in a warmer climate where temperatures average between -10 to +10 Celsius in Winter but colder temperatures should not make much difference unless you are extensively idling the engine to warm it before driving. The spark plugs should be good to 192,000 km / 120,000 miles. I've always waited to 120,000 mles to change spark plugs per the maintenance schedule and old spark plugs always looked like new. Using premium 91 octane fuel really isn't necessary. Toyota recommends regular gasoline for the same engine in the Sienna and it runs fine on regular.
  10. Did you read the section about EV mode in your owners manual? It starts on page 139 of the 2019 Lexus ES300h owners manual which you can view online at https://drivers.lexus.com/t3Portal/document/om-s/OM06178U/pdf/OM06178U.pdf It's probably working normally. One has to really "baby" the throttle to stay in EV mode in a non-PHEV Toyota hybrid. I've experimented with keeping my wife's Prius in EV mode as long as possible but can't after I drive out of our cul-de-sac due to very slight upward slopes in both directions and needing to go fast enough to avoid antagonizing or getting rear-ended by other drivers. A limitation of non-PHEV hybrid Toyota/Lexus vehicles sold in the North America seems to be their Ni-MH traction batteries. The same vehicles sold in Europe with lithium ion traction batteries have longer EV ranges at higher speeds. EV mode is more useful when the vehicle is just barely creeping along or not moving, e.g. entering/exiting our garage, when stopped at a traffic light or otherwise "idling" and waiting. I like how I can be waiting in line for a car wash bay on a hot summer day in silence with the hybrid system in EV mode and the interior being cooled by the all-electric A/C system. We like EV mode a lot and are leaning towards replacing our 2012 Prius with a 2021 RAV4 Prime plug-in hybrid which should become available later this year - it is supposed to go up to 40 miles at normal street/highway speeds in EV mode before the ICE kicks it. The RAV4 Prime will have a lithium ion traction battery like most PHEV's and full EV's. 40 miles is far more than my wife drives in a typical day. We're also considering the upcoming Tesla Model Y but aren't willing to pre-order without a test drive. A range increase to 320 miles was recently announced for the Model Y.
  11. I can offer only standard recommendations. Try rebooting your iPhone if you haven't already. Try turning Bluetooth on your iPhone off and then back on. Verify that your iPhone has the latest iOS update. (IIRC, there was an iOS update a while back that negatively impacted Bluetooth.) Delete your iPhone from the RX in-dash system. I don't specifically know how the RX in-dash system works but some Toyota/Lexus vehicles of that vintage require separately deleting the phone for hands-free and audio streaming. Re-pair your iPhone with the RX in-dash system. If all else fails, connect your iPhone to the RX aux-in port with a cord - it's a hassle but at least you will be able to listen to audio from your phone. I did that for years on an older car that didn't have Bluetooth. By the way, can other phones stream audio to your RX over Bluetooth without problems? Particularly, something other than an iPhone?
  12. A Lexus dealer can disable the feature with Techstream. I don't know if apps like Carista can do it. Lot's of people have been in the same boat as you. I think it was a Swiss army knife in the same pocket as my car key or fob that pressed against the buttons but my vehicles were in my garage the few times it happened. I got into the practice of removing my key/fob from my pocket as soon as I got home. It's a handy feature in hot weather. I've frequently opened windows, etc. with the key or fob as I approached one of our vehicles to let hot air escape when a vehicle has been sitting in the sun on a hot summer day.
  13. They can be difficult to find outside of a Lexus dealership. People on another forum have mentioned a shortage of the special batteries for the Toyota Highlander with stop/start - I wonder if that is related to your Lexus dealer not helping you. You could ask a Toyota dealership and give them the type code of the battery you need. It might be the same as ones used in the Highlander Hybrid and other Toyota hybrids. The problem with getting a battery from a Toyota dealership is that it might not be warranted for use in your Lexus - at least that's what I was told when I started to buy a battery from a U.S. Toyota dealership for my Lexus.
  14. The ClubLexus forum is at https://www.clublexus.com/ I've been a registered member on this forum and ClubLexus since around 2003. POE = "Port of Entry". All Lexus and Toyota vehicles go through a POE regardless even if manufactured in the U.S. That might be because car manufacturing plants are typically in a special tax zone. Accessories are usually (always?) installed at the POE instead of at the factory if the ordering dealership specifies accessory installation when the vehicle is ordered. It can be substantially less expensive to get accessories installed at a POE than at a local dealership and I suspect the quality is better since people at a POE are installing accessories in a factory-like environment. Car dealers typically outsource the installation of accessories like paint protection film instead of having their own employees do it. It's only less expensive to have accessories installed at a POE if the dealership passes along the savings to the customer. Some don't. Some do. I doubt that we will ever buy another vehicle out of dealer inventory after discovering the joys of special ordering and getting precisely what we want. We're both retired and I doubt that we will be buying many more vehicles. Our main travel vehicle is the 2014 Sienna Limited van referenced in my forum signature. I never thought I would be driving a minivan after 24 years of driving Lexus LS sedans and Mercedes for many years before that but it's pretty wonderful for carrying passengers and cargo. It's quite Lexus-like with it's nice leather interior and memory driver seat ... very similar to a fully optioned Lexus RX but with a usable 3rd row seat. I'm shooting for a 2021 Corvette C8 retractable convertible next year if my wife goes along with it - what every guy in his 70's needs! She's starting to relent.
  15. Several Toyota models (e.g. Highlander, Sienna) used the same brake system that the 2010-2015 Lexus RX used - rotors, pads, everything. I don't remember about the RX but I do remember there being a service campaign that addressed brake disc warping and vibration on the generation 3 Sienna. I have a 2014 Sienna but mine never developed the problems. I did modify components under the vehicle that directed brake cooling airflow per the service bulletin "just in case". I've wondered why I've never had the problems reported by many others especially since my Sienna Limited is heavier than any Highlander or RX and likely stresses the brakes more. One reason might be because I've paid extremely close attention to lug nut torque. Uneven and/or over torquing lug nuts is a known common cause of brake rotor warping. The correct lug nut torque on the RX, Highlander, Sienna and most other vehicles manufactured by Toyota is only 76 ft. lbs. An air wrench should never be used to tighten these lug nuts and they should always be tightened with a manual torque wrench. I've had both Lexus and Toyota dealers tighten lug nuts to over 200 ft. lbs. on too many occasions. One service manager swore that his mechanics never used air wrenches on lug nuts but I then watched as one of his mechanics had to use an air wrench to remove the lug nuts that one of his mechanics had just over-tightened. I've learned to always check lug nut torque with my own torque wrench after someone else messes with my wheels. If I hadn't done that, I wouldn't have been able to change a flat tire on one trip. So ... my 2014 Sienna that has the same brake system as the 2012 RX and is on the original brake rotors and pads front and back at 94,xxx miles. Based on the wear rate, I'll have the original front and rear pads replaced at the same time and the original rotors turned at a little over 110,000 miles when the pads will by then be worn down to the 1 mm minimum specification. Yes, only 1 millimeter of pad thickness is the minimum specification for most Lexus and Toyota vehicles. 1 mm looks scary to the uninformed which is why so many people get scammed into premature brake work. On Lexus vehicles that have electronic brake pad were sensors, the low pad warning in the instrument cluster starts when a brake pad is worn down to about 1.5 mm. My recommendation is to buy a torque wrench if you don't already have one and check and re-torque lug nuts after each time someone removes and re-installs your wheels.