Question about 2002 Lexus LX 470

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Center Differential Lock Stuck

My wife's 2002 LX-470's center diff switch has become stuck in the engaged position. I am hesitant to drive it 30 miles to the nearest service center this way. Owners manual indicates that electric service flows through fuse #40 in drivers kick panel, if I pull this fuse will the diff lock disengage? Also the switch when actuated does seem to click a relay under the glove box but car still remains in diff lock mode. Any ideas?

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  • fnb19 Jul 15, 2008

    I called the Lexus service center this morning before going back and they recommended backing up for at least twenty feet to dis-engage differential lock This worked on the second attempt and I did not need to pursue the fuse idea

  • Nana Aug 06, 2012

    Thank you, thank you! My Lexus 470 was stuck in 4wd, backing up worked the first try... :

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  • 2,427 Answers

Yes it will, once no power is going to it it should or it could remain locked as well Give it a try . But you should have a look at the relay

1 2
3 4

that is what the pins should look lik 1 - 4 should power it
try grounding pins 1 - 4 this should lick or unlock the diff..

Posted on Jul 15, 2008

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Was stuck using 4 lo. Had 3 wheels spinning except l/rear,just sat doing nothing.


4 wheel drive is unfortunately a bit of a myth as in 4 wd any two wheels with no traction will not move you any where
so if you have both rh side wheels slipping,
go no where
left front right rear ,
going no where
the wheel that was not turning was the only wheel that had traction but through the differential action the other wheel spun faster
now with limited slip diff centers , both wheels have to turn as the differential action locks up so yes you would be going some where.
posi traction is the same idea
vehicles that have limited slip diffs are Toyota and Nissan as standard with some Nissans having limited slip diffs in the front drive axle as well
now if you are doing a lot of 4wd driving in adverse conditions , you need to have locker diff centers ( available from off road shops ) as they physically lock the diff actions ( with the flick of a switch) with the result if all 4 wheels are spinning and you are not moving , your stuck but if one wheel has traction you keep moving

Nov 12, 2015 | Cars & Trucks

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1997 Terios center differential lock clunking when switched on problem with driving when engaged


sounds like you have a bad universal joint when you put it in 4 wheel drive ,

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Center differential


IF you are in constant 4wd then you will not have a centre diff unless you have an AWD. The difference is that AWD transfer cases have a centre diff that allows different road speeds between the front and rear diffs as in going over speed bumps and dips ion the road It is the same operation in the front and rear diffs that allow one wheel to go faster than the other when cornering. However in 4wd drive there is no diff action in the transfer case and both front and rear axles drive at the same speed regardless of speed bumps and dips in the road . This action produces what is known as torque wind up which results in the handling characteristics. This torque wind up places stress on all the drive line train and results in failures such as .that you describe.. This wind up is not noticeable when driving on loose surfaces slippery surfaces or in mud as it is allowed to escape when the wheels spin . If you have an AWD with diff lock capabilities then check that the diff lock is operating correctly

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I have a 5 speed 1994 toyota landcruiser prado short wheel base. The electric switch for the hubs illuminates when engaged however the 4wd light will not illuminate when the switch is engaged,...


what series? 80? LC?
which car do you have, we dont know see this quote
All 80s sold in North America and Europe now have a full-time four-wheel drive system. In Japan, Africa, and Australia, a part-time system was still available. 80s produced between 1990 and 1991 had an open centre differential which was lockable in 4HI and automatically locked in 4LO. From 1992 onward, vehicles with anti-lock brakes had a viscous coupling that sent a maximum of 30% torque to the non-slipping axle. The differential was lockable in 4HI and automatically locked in 4LO. unquote..
what drive do you have.????????? see the ambiguity here>>>????
Part time or Full time, it varies by unsaid COUNTRY !!

do not run Part time on dry pavement only ice or offroad.
or it will not shift or if does , it will wind up.

with or with out center differential.????
if with center and on dry road, the switch is bad or the linkage is failing
if no center diff, stop driving in part time 4wd on dry roads.

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1 Answer

How to put in four wheel drive


FOUR-WHEEL DRIVE SYSTEM

(a) Four-wheel drive control

Use the four-wheel drive control lever and center

differential lock button to select the following transfer and

center differential modes.

The "H" and "L" position of the four-wheel drive control lever

provides either lock or unlock mode of the center differential

depending on the center differential lock button position.

Use the center differential lock system if your wheels get stuck

in a ditch, or when you are driving on a slippery or bumpy

surface. When the center differential is locked, the vehicle

stability control system is automatically turned off and the

center differential lock and "VSC OFF" indicator lights come on

because the function that controls engine performance

As soon as the center differential lock switch is turned

on, the "VSC OFF" indicator light comes on. After the

wheels are out of the ditch or off the slippery or bumpy

surface, turn the center differential lock switch off.

Make sure the center differential lock indicator light and

vehicle stability control system off indicator light turn

off.

"H" (high speed position, center differential unlocked):

Lever at "H", center differential lock button left out

Use this for normal driving on all types of roads, from dry

hard-surfaced roads to wet, icy or snow-covered roads. This

position gives greater economy, quietest ride, least wear and

better vehicle control.

"H" (high speed position, center differential locked): Lever

at "H", center differential lock button pushed in

Use this for greater traction when you experience a loss of

power, such as wheel slipping, in the center differential unlock

mode.

"N" (neutral position): Lever at "N"

No power is delivered to the wheels. The vehicle must be

stopped.

"L" (low speed position, center differential unlocked):

Lever at "L", center differential lock button left out

Use this for maximum power and traction. Use this for climbing

or descending steep hills, off-road driving, and hard pulling in

sand or mud.

In this mode, the braking feeling that occurs when the wheels

are negotiating a sharp corner is further reduced than in the "L"

(low position, center differential locked) mode.

"L" (low speed position, center differential locked): Lever

at "L", center differential lock button pushed in

Use this for maximum power and traction. Use this for hard

pulling in situations the vehicle cannot negotiate even in the "L"

(low speed position, center differential unlocked) mode. Also,

using this mode when driving down steep off-road inclines will

help contribute to increased vehicle stability.

https://secure.drivers.lexus.com/lexusdrivers/info/my-lexus/resources/submit-owners-manual-search.do

Please copy and paste the link above and it will take you to the lexus site. There you will find the owners manual and you can download whatever sections you need for free.

Hope this helps.

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1 Answer

I just bought a RAV4 in France. Owners manual is


This is a manual center differential lock button for 4WD models.
When you push this button, it manually locks the front and rear axles. An amber C DIFF LOCK light should appear on the dash board when engaged.
Push it again and it will disengage. It may take a few seconds to disengage, and a beeping will be heard until the diff is unlocked.

The center differential lock is only meant to be used in emergency situations. Driving with it engaged at all times can damage your differential.

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J5

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