If you can't find the audio amplifier under the seat as mentioned in the manual, there are a few other places you might want to check:
Trunk area: Some Lexus LX470 models have the audio amplifier located in the trunk area, often mounted on the side panels or near the rear speakers.
Behind the dashboard: In some vehicles, especially those with more complex audio systems, the amplifier may be located behind the dashboard or near the head unit. You may need to remove some panels to access it.
Under the center console: Occasionally, car manufacturers install amplifiers under the center console or beneath other interior panels. This location keeps the amplifier hidden and can save space in the trunk or under the seats.
Behind the glove compartment: Sometimes, especially in luxury vehicles like Lexus, the amplifier may be tucked away behind the glove compartment. Removing the glove compartment may give you access to the amplifier.
If you still can't locate the amplifier after checking these areas, you may need to consult with a professional car audio technician or refer to specific technical documentation for your vehicle model. They may have insights or access to resources that can help you pinpoint the exact location of the amplifier.
Certainly! Here's a question inspired by your inquiry:
"I'm a proud owner of a 1998 Lexus LX470 with the Lexus Premium Sound System, Matsushita Model No 8620-60320, Reference No CQ-LT4730A. Does anyone have information on the pin-out and schematic for this particular sound system? I'm looking to understand the wiring better and would greatly appreciate any insights or resources on this topic. Thank you!"
I have read this 6 times and still not sure what the issue is? I have a 2005 ES330. To open all the doors with the key fob, you have to double press the Unlock Button. Pressing the Unlock button once, only opens the driver door.
The door lock module and further help is in the link.
https://www.google.com/search?q=2003+lexus+rx300.+door+lock+module+location
The Club Lexus forums are a great resource.
Yes, it is possible for the ECU to be bad even if it is still providing codes to the OBD2 scanner. The ECU is a complex electronic device and it is possible for one or more of its internal components to fail without affecting its ability to communicate with the OBD2 scanner.
In your case, the fact that the codes went away after replacing the #35 fuse and the IAC motor suggests that those were the underlying problems causing the "crank but no start" condition. However, the fact that the car still won't start after those repairs indicates that there is another problem, and it is possible that the ECU is at fault.
To be sure, you would need to take the car to a qualified mechanic and have them perform a more thorough diagnosis. The mechanic may be able to test the ECU to see if it is functioning properly. If the ECU is found to be bad, it will need to be replaced.
Here are some other possible causes of the "crank but no start" condition in your Lexus IS300:
Faulty fuel pump
Faulty spark plugs
Faulty ignition coil
Faulty camshaft or crankshaft sensor
Low compression in one or more cylinders
Clogged fuel filter
Restriction in the air intake system
If the mechanic is unable to find any other problems, then the ECU may indeed be the culprit. However, it is important to rule out all other possibilities before replacing the ECU, as it can be a costly repair.
The Check Engine Light is on? Did you read the DTCs.
The second link has the answer, the first link says it is a known issue. It is times like this you need the Dealership or a good auto electrician.
does it start with 5%(a tad) right foot throttle pressed?
is the IP cluster, IMMO lamp happy? (immobilizer)?????
check all fused first? NOT RELAYS.
check spark first if engine itself tests good.
the classic way for 100 years a test spark plug used.
if spark is good then spray test fuel works.? FOR 3seconds
if that works, then fueling is bad. (no start)
the knock sensor does not kill spark. (it fine tunes spark timing only and only if the engine pings going fast.
then scan the pCM OBD2 port for DTC errors.
check fuel pressure, at the rail.
ok dead fuel pressure.
fuel pump relay is called on this car
AS EFI MAIN relay
HORN RELAY SAME (SWAPS)
if the PCM detects spark bad it cuts fuel dead.
to prevent crash and burn as see on TV..
the crash sensor also trips the pump off line.
page 553 users man
FUEL PUMP SHUT OFF SYSTEM
The fuel pump shut off system stops supplying fuel to the
engine to minimize the risk of fuel leakage when the engine
stalls or an airbag inflates upon collision. To restart the engine
after the fuel pump shut off system activates, turn the ignition
switch to "ACC" or "LOCK" once and start it.
https://au.lexusownersclub.com/forums/topic/8368-how-do-i-access-the-rx330-fuel-pump/
There is a fuel pressure Shrader Valve just before the fuel rail. All this stuff can be diagnosed with a professional grade scan tool computer at the stealership, or call out a mobile auto electrician.
https://www.google.com/search?q=mobile+auto+electrician+near+me
..
Some throttle pedals when they are replaced need to be calibrated to the vehicle so the electronics understands were the new pedal is for each position as you use the pedal. This is often done using an OBD2 diagnostic system.
If you have to pay for this service ask at 4 or 5 different places as prices can be VERY different.
using only electronic key or the metal key.(feature)
got park assist option?
a no key slot ignition, fails we scant the PCM for cause.
the steering is first. so wheels against curb or hard rock>?
front tires are free of objects?
to unluck it , try both key car came with new
and grab the wheel and move it CCW/CW roughly to free the key.
shifter is in park I guess. try Neutral? step brake
release hand brake, and shift to N
then unlock wheel. this answer is flat ground answer only
the steps are here
Check that the parking brake is set.
Check that the shift lever is set in P.
Sit in the driver's seat and firmly depress the brake pedal.
The "ENGINE START STOP" switch indicator turns green.
Pressthe"ENGINESTART
STOP" switch
if steering lock fails the books states
The "ENGINE START STOP" switch indica-
tor will flash in green and a message will be
shown on the multi-information display. Press
the "ENGINE START STOP" switch again
while turning the steering wheel left and right!!
read page 137
https://assets.sia.toyota.com/publications/en/om-s/OM53839U/pdf/OM53839U.pdf
Why do you think there is fuel in the oil? Does it smell like it? Or is the dipstick level climbing? Tell us more about the problem and what you have already tried/done. When was the car last fully serviced? Poor maintenance is no excuse for poor running.
NO COUNTRY TOLD at all. (sold to day1 new) no VIN told no VIN #8 digit told so we can see what engine is there. and what country, some have 8 engines choices not one I can guess and is a pure engine question the endless hunt here. 2 gas engines here and 1 hybrid , engine is TOYOTA's USA got the 3.5L V6, are you here? USA??? the USA engine has 2 pin CKP sensor, 2 pins is huge clue. crank sensors are on the cranks sure but are on front, middle or rear of crank or even under flywheel, 4 places all engines, 1 is true the cranks shaft has the CKP huge tone while dead front of crank. the service manual covers this, only or you can google this. toyota 3.5 L 2GR-FE V6 cranks sensor location bingo.(note using the real name)
most cars IT is deep in the IP cluster
only the SM service manual shows this.
door AJAR CHIME
THE DOOR OPENS AND DOOR CPU SENDS THIS
DATA FACT TO THE CLUSTER, (ON THE MX DATA NETWORK AND THE CLUSTER CHIMES.
if the chime is bad say so? we can not guess goals.
or too loud or what?
here it is
2006 Lexus RX400H hybrid .and long story.(you added and very very good)and if was mine, my story would be same, park it and wonder what to next.?this car is very complex, unlike ICE real cars were simple and still are to a good extent.I do wish you find a good shop to cure all that.a full service manual in hand may do the trick.IDK.good luck! and be SAFE.use the scan tool as the hybrid starts and fails to light off the engine, see DTC code for that.scan before ,during and after failuresand use the pending button too on t he scan tool as here may be marginal or intermittent failuresalso (Im no hybrid guru) but some hybrids do not run the engine (to save fuel) until the battery has some amount of discharge detected.some even have switches to set the mode you want,save fuel or save battery life, IDK this car.