Question about 2000 Lexus RX 300

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My lexus rx300 new belts are squealling,battery light on,

Have new belts,new battery,alternator is good,also. Belt squeal when air is turned on,battery light comes on, and now for it has failed to turn over twice in the past two weeks on the first crank like the battery wasnt even hooked up.???

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As the a/c motor is a pump (resistance to turning),if the belt is not adjusted correctly(too loose)it will squeel,and the alternator will not produce enough power to keep the battery charged up.you should always retension the belts after about 1k/1 month after fitting new.
adjust so that the longest run of the belt, between pulleys, has 1/2"flex

Posted on Jul 16, 2010

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2 Answers

Why does the Lexus rx300 belt make a squeel noise when a/c unit starts running?


Most LIKELY is either the belt needs to be replaced or the belt tensioner needs to be replaced. The belt gets hard and "slick" as it ages, the tensioner holds the belt tightly against the pulleys. Either could cause slippage (hence the squeal) when the A/C comes on.

Jul 09, 2014 | 2000 Lexus RX 300

1 Answer

Squealing belt, replaced tensioner and new belt still squealling


Pulleys may not be properly aligned. Could be that a bracket is bent. This happened to my car once. I put another alternator bracket on and it fixed the problem.

Mar 26, 2013 | 1999 Dodge Grand Caravan

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Toyota Siena squealls when car starts & really bad


Do you know how old the assy drive belt is?

There other item would be the blower under the dash
Should be easy to separate those sounds

Sep 10, 2012 | Cars & Trucks

1 Answer

Alternator


Vehicles: any failing to keep its battery charged.

A vehicle unable to charge its own battery has one of 4 problems:
(a) alternator failure
(b) voltage regulator failure
(c) battery failure
(d) wiring problem between battery and alternator/voltage regulator.

One most modern vehicles (including 2002 Lexus RX300 - 2WD and AWD), the voltage regulator is an integral component of the alternator and is not separately serviceable.

In the US, one can get a free "charging system diagnosis" from the popular auto parts chains: AutoZone, Advance Auto Parts & Pep Boys. You needn't remove any parts from the car to get this diagnostic, since they can attach a diagnostic meter to the charging system in the parking lot. This diagnostic aid will tell you exactly which component has failed - battery, alternator or voltage regulator.

In case the vehicle is immobile, one can DIY (do it yourself) the diagnosis.
(a) inspect the wiring for corrosion/loose connections/loose connectors/etc.
(b) check alternator belt/pulley - if drive belt is properly turning the alternator pulley (no slippage/misrouting/etc.), then the mechanical tests are complete, and you'll need to continue testing the electrical performance of the charging system components.
(c) first component to test: battery
DIY test 1: remove battery from car and put battery on a 120VAC automotive battery charger and charge it fully (or just check it in the car with motor off, since the car's charging system is a type of automotive battery charger).
test parameter: a fully charged lead-acid automotive battery should read 12.45 volts on a VOM/DMM
DIY test 2: disassemble battery out of car after driving it to one of the auto parts chain stores (Advance/AutoZone/Pep Boys) for a free battery test. These testers will test the battery under load, which is not possible with just a DMM.
(d) if wiring is good, and battery tests good under load, then
the failed component is the alternator/voltage regulator - by process of elimination.
(e) DIY test 3: direct alternator/voltage regulator test (car must start and idle successfully to perform this test)
Start the car, and put a VOM/DMM across the terminals of the battery. Since the car is running, you'll be reading the output voltage of the alternator and not the output voltage of the battery. The acceptable ranges for alternator/voltage regulator output are:

ALTERNATOR CHARGING VOLTAGE

Most alternators that are charging properly should produce a voltage of about 13.8 to 14.2 volts at idle with the lights and accessories off. Always refer to the vehicle manufacturer's specifications. Many Asian vehicles, for example, have higher charging voltages of around 15 volts.

When the engine is first started, the charging voltage should rise quickly to about two volts above base battery voltage, then taper off, leveling out at the specified voltage.

The exact charging voltage will vary according to the battery's state of charge, the load on the vehicle's electrical system, and temperature. The lower the temperature the higher the charging voltage, and the higher the temperature the lower the charging voltage. The "normal" charging voltage on a typical application might be 13.9 to 15.1 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.8 volts. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts.

Here are the full specs for installation of the 2002 Lexus RX300 alternator - you may be able to check these specs yourself (with a torque wrench), or pass them along to your mechanic.

Note: the VIN 8th digit should be "F" for the 2002 Lexus RX300 (2WD & AWD)

2002 Lexus RX300 (2WD and AWD) - 3.0L Engine, VIN "F" SFI DOHC

Alternator

Drive belt. Tension the belt to 170-180 lbs. for a new belt or 95-135 lbs. for a used belt.
Adjusting alternator lockbolt. Tighten the bolt to 13 ft.-lbs. (18 Nm).
Alternator pivot bolt. Tighten the bolt to 41 ft.-lbs. (56 Nm).

Glossary of acronyms
--------------------------------
DIY = do it yourself
DMM = Digital Multimeter
DOHC = Dual Overhead Cam
SFI = Sequential Fuel Injection
VOM = Volt Ohmmeter

References
----------------
How to test a Car Alternator - todayifoundout.com

Alternator & Charging System Checks - aa1car.com

Dec 26, 2011 | 2002 Lexus RX 300

1 Answer

Hi there. I have lexus rx300. A few days ago the brake light been going on and off when driving. So i took it to the dealer, then they only said the brake fluid was low, but if it happens again then we...


If the fluid level is again low, you are losing it; if not, the level sensor is likely bad. Lost fluid indicates a failed master or slave cylinder at one of the wheels. The squealing you are hearing isn't likely from the brakes but from a belt that needs replacement or at least tightened; the fact that is squeals when starting and in turns, indicates that the steering pump being driven by that belt is slipping a little under the stress of making turns. This often goes away once the engine room is warmed up since the belt rubber gains a little grip when warm which stops the squealing.

Jul 10, 2011 | Lexus RX 300 Cars & Trucks

1 Answer

My lexus rx300 new belts are squelling,battery light on,


It sounds like you have loose belt(s). When the A/C is turned on, it puts a big load on the belt, if it is loose and starts slipping and squeeling, then the alternator won't turn, so the battery runs down as you drive. Make sure all your belts and battery terminals are tight.

Jul 16, 2010 | 2000 Lexus RX 300

3 Answers

I have a squeal that makes my battery voltage drop and im not sure what it is. it is not the alternator


can be a couple of things, the belt may be slipping on the pullys or the brushes are worn in the alternator, possibly the latter, take to a mechanic he won't charge you to look at it. Good luck

Nov 20, 2009 | 2000 Dodge Durango

1 Answer

How to tighten belts on a 2002 Lexus RX300


Bring it back to the dealer, tell them they squeck. new belts should not squeck. Squeaking means they are too loose or have fluids on them. If they're not shiny, the're loose.

Sep 16, 2009 | 2002 Lexus RX 300

3 Answers

03 kia spectra new alt and belt random squealing now no heat


right size belt ? cheap belt ? have battery tested

Feb 19, 2009 | 2003 Kia Spectra

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