Question about 2003 Toyota 4Runner

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Center differential is locked. How do I unlock it? pushing the button doesn't turn it off and I can't drive.

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SOURCE: door locks not working

You have a common proble. Replace the control assembly. have replaced several with the same issue.

Posted on Jul 18, 2009

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SOURCE: drivers side rear door not locking. push the

pull the door panel off an look to see if the striker rod for the lock is connected to the lock...u may want to have a service station look at it since pulling a door panel can sometimes be complex...u can easly break the plastic paneling if u have not removed door panels before

Posted on Jul 15, 2011

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Why does my 4 wheel drive not work all the time?


Elaine,

not work, do tell what makes you think it dont work (a lamp) or tires slipping or dead tires. (by tires mean that and traction)??????????

what mode fails, of the many, and where.???????



first off, we dont know what your tires are touching.

on road, or off road. pavement or ICE or snow.

that matters big time . (you read manual and match MODE to Road)

your lost operators guide explains all that, right?

eg: how and when to use, 4wd, its all there. I promise.

ControlTrac 4-wheel-drive system



here are the mode. which one , gives you problems.



quote ford with comments.



What are the modes, and how do they differ?

(note this is the operational behavior of a 2008 Ford Expedition. Newer and older Expeditions will vary only slightly)



2H 2-wheel-drive with high range gearing (1.00:1) Rear-wheel-drive capability,

2-wheel electronic traction control system is enabled



4A 4-wheel-drive Auto with high range gearing (1.00:1) Full-time all-wheel-drive capability, ((best on pavement or any time)

Electronically adjusted torque split to front & rear wheels, Electronically variable center differential,

Front driveshaft & rear primary driveshaft allowed rotational speed difference,

4-wheel electronic traction control system is enabled



4H 4-wheel-drive with high range gearing (1.00:1) Part-time 4-wheel-drive capability, (not for dry pavement EVER)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled



4L 4-wheel-drive with low range gearing (2.64:1) Part-time 4-wheel-drive capability, (off road usage, mostly)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled, ESC and RSC are disabled



In 4A mode the center differential is electronically-controlled and rear drive wheel bias. The on-board computer monitors for any sign of rear drive wheel slip (loss of traction)

If loss of traction is detected, the center differential is told to send a share of the engine\'s torque to the front drive wheels. It will not let the front driveshaft turn at the same speed as the rear driveshaft.



What about traction management?

1997-2002 model Ford Expeditions offered an optional limited-slip rear differential (LSD). A conventional open rear differential was standard along with the conventional open front differential and the electronic locking center differential.

comment with out LSD, one tire can spin, on say ice.

but the other 3 tires dont, in full time.

Jul 04, 2014 | 2003 Ford Expedition

1 Answer

There is no drive shaft for the 4 wheel drive however the button got pushed and it sounds horrilble


button got pushed in, the front differential is now locked in, and your ring and pinion gears in the front are now turning when you drive. There must have been a problem with your frontend, or the driveshaft would not have been removed. I bet your front ring and pinion have damaged gears! Just curious, did you buy this blazer this way? Who removed the driveshaft?

Dec 10, 2013 | 2000 Chevrolet Blazer

1 Answer

I have changed 4WD Actuator on my 2007 Toyota 4Runner. Now the Central Differential Lock isn't coming off when pushing(but don't know if before it was working). I push to Unlock the Differential but i


Put back on H2 or all normal, remove both battery cables from the battery, without touching the battery, hold the positive and the negative cables together for 30 seconds, then return the cables to the proper posts on the battery. This will drain all memory at the ECU, the next 10 or so miles , under normal driving will re- teach the computer. I hope this improves the issue!

Dec 03, 2013 | 2007 Toyota 4Runner

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.

Feb 11, 2011 | 2004 Lexus GX 470

1 Answer

I have the light up opn the dashboard illuminating the words C.DIFF LOCK what does it mean??


That means that the center differential is locked, making it 4-wheel drive, but restricting the tightness of turns that it can take. You should not operate it on dry pavement or above 45mpg in C DIFF LOCK mode or it could damage the car.
To turn it off, drive it to a level spot, stop, and press the button to turn it off. Drive a few feet forward and wait for the tone to go off. If necessary, put it in revers, drive backward a few feet and then go forward. That should turn the tone off and the light.

Jan 23, 2011 | 1997 Toyota RAV4

2 Answers

Should the front drive shafts be turning when the truck is not in 4 wheel drive


If your transfer case has an "auto 4wd" push button choice then the front shaft will turn all the time. This is due to how the transfer case is designed internally to provide that option.

Nov 02, 2010 | 2001 Chevrolet Silverado 1500

2 Answers

My 2006 Hummer H3 is having the same issue with the Four-wheel drive button. Do you put the vehicle in park then neutral and then select 4Up? I was told to drive it backwards to unlock it if it doesn't...


It doesn't take long to learn when and how to use your truck's 4WD system. Follow these steps and you'll feel confident about engaging the system the next time you need to get out of a slippery situation.

For a conventional system, where you can select 2WD or 4WD, the instructions refer to engaging 4WD. For trucks with permanent 4WD, they refer to locking the center differential.

Time Required:
varies
Here's How:
  1. Refer to your owner's manual to find out how to engage your truck's 4WD mechanism.
  2. When driving in snow, mud, or just going off road, shift into 4WD when you get ready to leave solid ground. If you have lockable front hubs, lock them for those operations.
  3. For severe conditions, use low range if available. Before shifting into low range you must either stop or slow down to at least 3 mph to prevent grinding gears.
  4. When you return to normal conditions, shift out of 4WD or unlock the center differential. If the shifter doesn't want to move from 4WD or the differential lock stays engaged, don't panic, becaue the problem is normal and is caused by pressure on the gears.
    • Try backing in a straight line about 10 feet and try to move the shifter again.
    • If the shifter still won't move, try backing in an "S" pattern while trying to move the shifter.
  5. If you have lockable hubs, don't forget to unlock them when you return to dry pavement.
Tips:
  1. Vehicles with permanent 4WD are set up for everyday driving, but not necessarily for maximum traction on slick surfaces. Engaging the differential lock increases the vehicle's traction capabilities.
  2. Do not operate a locked 4WD on dry, hard surfaces. Doing that could cause damage to the driveshafts, differentials or transfer case.
What You Need:
Owner's Manual

Good luck and remember to rate this solution.

Thanks for using Fixya.

Mar 07, 2010 | 2009 Hummer H3

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.

Oct 04, 2009 | 2007 Toyota RAV4

2 Answers

Where does diff lock display come on dash or button


diff lock displays on dash and is opperated by a dial to the left of the steering column. the center diff lock is operated by a button in the center dash and locks your center differential, making your front and rear driveshafts turn at the same speed. the front and rear differentials lock either your front or rear or both differentials making each wheel on the same axle turn at the same speed. all of these features are for increased traction in off road and wet conditions and situations

Jul 13, 2009 | 1993 Toyota Land Cruiser

1 Answer

Differetial locks for 94 land cruiser


91-97 Land Cruisers had a factory option for front and rear locking differentials. This is a seperate switch and is usually located to the left of US model Land Cruisers. The center dash button locks your transfer case differential changing your Land Cruiser from all wheel drive to four wheel drive depending if you have ABS or not this button either says ECT or Center Dif Lock. If you do not have the Front/Rear locking differential option then your Land Cruiser has open Front and Rear. Hope this answers your question.

Jan 19, 2009 | 1994 Toyota Land Cruiser

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