AWD Lock - Nissan Murano Forum
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post #1 of 19 Old 10-11-2011, 12:15 AM Thread Starter
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AWD Lock

Hey guys quick question the AWD lock button on bottom, when I press it on park and the AWD Lock light turns on, does it mean the AWD is locked and it doesnt turn on, or does it mean the AWD will always stay on until I turn off the car?
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post #2 of 19 Old 10-11-2011, 01:02 AM
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AWD lock keeps all 4 wheels locked up to a specific speed...I think it's about 10 to 14 MPH. Used for better traction in snow,sand etc. So no, hitting the AWD lock while in Park does not turn it off.

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post #3 of 19 Old 10-14-2011, 06:44 PM
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Dont use the AWD lock button at all unless you are off road or in snow. All wheel drive always functions and there is no way to turn it off. As HVT said the lock button locks all 4 wheels in up to a certain low speed for improved traction on low traction surfaces. Using it on dry pavement can cause damage to the AWD system.

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post #4 of 19 Old 10-15-2011, 09:42 AM
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I wouldn't use it unless you are stuck! There is no need to turn it on off-road or in the snow unless you are dead stuck. We get heavy snow here and the AWD is more than capable to get around, I haven't had to lock it yet. Do a search and you'll see there are plenty of posts regarding the same.

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post #5 of 19 Old 10-15-2011, 10:33 PM
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lol...relax guys. It's not a 4WD and the AWD lock doesn't act like a part time set-up. You're fine to use it if you feel the need. You won't hurt anything. It'll shut off if not needed or if going faster than the specific low speed.

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post #6 of 19 Old 10-17-2011, 04:51 AM
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There seems to be so much speculaton and a variety of opinions on this issue...Nissan bilds a 4 wheel lock that has a specific function....yet some folks say don't use it because you can damage it...others say it shuts itself off at 10-18mph, others say no problem, use it at will, but only in snow or mud.

It's always perplexing to me to get conflicting information like this...if Nissan has a shi**y AWD control, then I'd like to know...I've never used mine mostly because of all the scare tactics used in the forums...it's there to use....some engineer(s) allegedly designed it as an AWD assist for those instances where you might need a little extra traction. The U tube video clip I saw of the various cars going up a 30 degree dirt ramp didn't do the Murano very much justice....it couldnt' make it up the slope. What's a guy to believe here? Use the damn thing until it breaks and hope that the CVT warranty covers it unless it knocks out the tranfer case in which case you appear to be S.O.L.

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post #7 of 19 Old 10-17-2011, 12:56 PM
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Can't speak for second generation but AWD system in first generation MO when turned on locks the wheels in such a way that they all turn at the same rate. This is obviously not an issue if you are driving straight, or turning on slippery roads where wheels can compensate by slipping a little. But if you try to turn on a dry road where wheels cannot slip, then the chances for your transfer case to get damaged is really high. The AWD system is also set to disengage above a certain mph (it was 18 mph for 03 and 04 and later reduced to 6 mph for 05 and above) so manually putting it in locked position above that speed will not make a difference. However the computer will activate AWD if it detects wheel slippage at any speed.

Former owner of 2004 SL AWD
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post #8 of 19 Old 10-17-2011, 01:17 PM
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cj-

The MO's AWD system is not a very well thought out system. Most systems have a differential between the front and rear to compensate for the difference in front/rear axle speeds when a vehicle is turning. The lack of a center differential can cause the driveline to bind and stress the components. The weak point in the stressed drive train appears to be the transfer case which is only covered by the powertrain warranty.

Any four-wheeler will tell you you can not drive on dry ground with a LOCKED center differential. The driveline will bind and if stressed enough some component will fail. When the MO's AWD LOCK is engaged below xx-mph it's rear clutch pack functions as a locked differential.

Nissan acknowledge this deficiency back in November 2004 when it released TSB#04-129 that instructed the mechanic to replace 1) the AWD-LOCK toggle switch with a momentary-on switch and 2) the AWD controller, when replacing a damaged Transfer Case. The first section of the TSB contained the following note: Damage may have been caused by operating the AWD system in the LOCK mode on dry pavement.

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post #9 of 19 Old 10-17-2011, 02:26 PM
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Njj, has the issue been permanently resolved for the 2nd gen?
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post #10 of 19 Old 10-17-2011, 07:03 PM
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http://www.nissanusa.com/content/dam...san-Murano.pdf

Page 5-22 talks about the AWD LOCK

LOCK mode will change to AUTO mode
automatically when the vehicle has been
driven at a high speed. The AWD LOCK
indicator light turns off.
*3: LOCK mode will automatically be cancelled
when the ignition switch is turned to the OFF
position.
. If the AWD LOCK switch is operated while
accelerating or decelerating, or if the ignition
switch is turned off, you may feel a jolt. This
is normal.
. The oil temperature of power train parts will
increase if the vehicle is continuously
operated under conditions where the difference
in rotation between the front and rear
wheels is large (wheel slip), such as when
driving the vehicle on rough roads through
sand, mud or freeing a stuck vehicle. In
these cases, the AWD warning light blinks
rapidly and the AWD mode changes to
2WD to protect the powertrain parts. If you
stop driving with the engine idling and wait
until the warning light stops blinking, the
AWD returns to the AUTO mode.
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post #11 of 19 Old 10-17-2011, 09:26 PM
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Quote:
Originally Posted by 121traffic View Post
Njj, has the issue been permanently resolved for the 2nd gen?
Yes... and no.

Starting with the 2005 MO the AWD-LOCK switch and AWD controller were modified to default to the automatic mode once vehicle speed exceeds 6-mph.

However, the MO still does not have a center differential. So if you engage the AWD-LOCK switch and drive at 5-mph on dry pavement you will bind the driveline if you deviate from a straight line.

That is why it is best to simply leave the switch alone unless you are attempting to start in low-traction conditions and the wheels are spinning.

-njjoe

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post #12 of 19 Old 10-18-2011, 12:49 AM
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And since the new muranos all start from a standstill in 50/50 AWD mode, the AWD lock shouldn't even be needed.

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post #13 of 19 Old 02-14-2014, 10:20 AM
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From my understanding the AWD Muranos..it runs on 80/20 then when the AWD is engaged it is 50/50....

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post #14 of 19 Old 02-14-2014, 01:01 PM
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Quote:
Originally Posted by HVT View Post
And since the new muranos all start from a standstill in 50/50 AWD mode, the AWD lock shouldn't even be needed.
I don't believe that is accurate. The Murano system is all-time FWD, and in standard mode the rear drive kicks in only when the front wheels begin to slip...so the front wheels engage first, and the rears only if slip occurs. I can feel this quite easily in my 07.

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post #15 of 19 Old 02-18-2014, 11:20 PM
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It's accurate. From a stop, AWD is always 50/50. It converts to 100/0 FWD once up to speed (specific speed not given though). Here's the quote from the brochure:

"All Wheel Drive - The second you pull away, the AWD turns on, delivering power to both front and rear wheels for improved grip. Once you're up to speed, no sense powering all four wheels, so Murano efficiently sends the power all up front. Then, for enhanced cornering control and traction, AWD compensates by transferring some of that power (70/30) from the front wheels to the rear".

So yes, from a stop, Murano is always powering all four wheels. The Rogue works the same way.

Oh and I just noticed you have an 07. I could be wrong but I believe this only pertains to the 09s and up.

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