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I finally took my Commander in some pretty serious mud this past weekend. I have the QDII system, so I turned off the ESP and left it in regular 4 Hi. When the mud got really tough and the Commander started to slip and really had to work to get through the mud, it made a clunk sound followed by a grinding noise. The commander did well and handled the mud better than most, but the clunk and grinding noise made me somewhat nervous. Has anyone else experienced it?

On the way out, I put it in 4Lo and it handled everything great. I saw a big improvement as far as handling between 4hi and 4lo. 4Hi did fine, but it would start to slide or bog down, and then make the noises and regain control and power out of the mud.

I was wondering if the clunk and grinding noise was normal or do I need to bring it in? My guess was it was redistributing the power, but was surprised by the noise.
 

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its the brake activated traction control. mine does it all the time when i hit the gas on ice or snow, or i'm on three wheels while climbing obstacles. you'll get used to it.
 

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Yes, very normal. Although scary at first.
 

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slw&lw said:
I finally took my Commander in some pretty serious mud this past weekend. I have the QDII system, so I turned off the ESP and left it in regular 4 Hi. When the mud got really tough and the Commander started to slip and really had to work to get through the mud, it made a clunk sound followed by a grinding noise. The commander did well and handled the mud better than most, but the clunk and grinding noise made me somewhat nervous. Has anyone else experienced it?

On the way out, I put it in 4Lo and it handled everything great. I saw a big improvement as far as handling between 4hi and 4lo. 4Hi did fine, but it would start to slide or bog down, and then make the noises and regain control and power out of the mud.

I was wondering if the clunk and grinding noise was normal or do I need to bring it in? My guess was it was redistributing the power, but was surprised by the noise.
When you say you turned off ESP, what did you do? Please give set by set.
 

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Here are the instructions. Sorry they look like they do but that's how they turned out after copying and pasting them from my document folder.


NOTE:
To improve the vehicle’s traction when driving
with snow chains, or starting off in deep snow, sand, or
gravel, it may be desirable to switch to the “Partial Off”
mode by pressing the ESP switch. Once the situation
requiring ESP to be switched to the “Partial Off” mode is
overcome, turn ESP back on by momentarily depressing
the “ESP Control Switch”. This may be done while the
vehicle is in motion.

Full Off
This mode is intended for off-highway or off-road use
when ESP stability features could inhibit vehicle maneuverability
due to trail conditions. This mode is entered by
depressing and holding the “ESP Control Switch” for 5
seconds when the vehicle is stopped and the engine is
running. In this mode, all ESP and TCS stability features
are turned off except for the “limited slip” feature described in the TCS section. After 5 seconds, a chime will
sound, the ESP/TCS Indicator Light will illuminate,
and the ESP OFF message will appear in the Electronic
Vehicle Information Center (EVIC). Refer to “Electronic
Vehicle Information Center (EVIC)” in Section 4 of this
manual. (See page 186 for more information.) To turn ESP
on again, momentarily depress the ESP Control Switch.
This will restore the normal “ESP On” mode of operation.

NOTE:
The “ESP OFF” message will display and the
audible chime will sound when the gear selector is
placed into the “P” (Park) position from any position
other than “P” (Park), and then moved out of the “P”
(Park) position. This will occur even if the message was
previously cleared.

WARNING!
With the ESP switched off, the enhanced vehicle
stability offered by ESP and ERM are unavailable. In
an emergency evasive maneuver, the ESP and ERM
systems will not engage to assist in maintaining
stability. The “Full Off” ESP mode is intended for
off-highway or off-road use only.
4WD Low Range


Partial Off
This is the normal operating mode for ESP in 4WD low
range. Whenever the vehicle is started in 4WD low range,
or the transfer case (if equipped) is shifted from 4WD
high range or neutral to 4WD low range, the ESP system
will be in this mode. In 4WD low range, ESP and TCS,
except for the “limited slip” feature described in the TCS
section, are turned off until the vehicle reaches a speed of
30 mph (48 km/h). At 30 mph (48 km/h), the normal ESP
stability function returns but TCS remains off. When the
vehicle speed drops below 25 mph (40 km/h), the ESP
system shuts off. ESP is off at low vehicle speeds in 4WD
low range so that it will not interfere with off-road
driving but ESP function returns to provide the stability
feature at speeds above 30 mph (48 km/h). The
ESP/TCS Indicator Light will always be illuminated in 4WD
low range when ESP is off.

Full Off
This mode is intended for off-highway or off-road use
when ESP stability features could inhibit vehicle maneuverability
due to trail conditions. This mode is entered by
depressing and holding the “ESP Control Switch” for 5
seconds when the vehicle is stopped and the engine is
running. In this mode, all ESP and TCS stability features
are turned off except for the “limited slip” feature described
in the TCS section. After 5 seconds, a chime will
sound, and the “ESP OFF” message will appear in the
Electronic Vehicle Information Center (EVIC). Refer to


“Electronic Vehicle Information Center (EVIC)” in Section
4 of this manual. (See page 186 for more information.)
To turn ESP on again, momentarily depress the
“ESP Control Switch”. This will restore the normal “Partial
Off” mode of operation in 4wd low range.

NOTE:
The “ESP OFF” message will display and the
audible chime will sound when the gear selector is
placed into the “P” (Park) position from any position
other than “P” (Park), and then moved out of the “P”
(Park) position. This will occur even if the message was
previously cleared.

WARNING!
With the ESP switched off, the enhanced vehicle
stability offered by ESP and ERM are unavailable. In
an emergency evasive maneuver, the ESP and ERM
systems will not engage to assist in maintaining
stability. The “Full Off” mode is intended for offhighway
or off-road use only.

ESP/BAS Warning Lamp and ESP/TCS Indicator
Light
The malfunction indicator lamp for the ESP is
combined with the BAS indicator. The yellow
“ESP/BAS Warning Lamp” and the yellow
“ESP/TCS Indicator Light” in the instrument
cluster both come on when the ignition switch is turned
to the “ON” position. They should go out with the engine
running.
If the “ESP/BAS Warning Lamp” comes on
continuously with the engine running, a malfunction
has been detected in either the ESP or
the BAS system, or both. If this light remains on
after several ignition cycles, and the vehicle has been
driven several miles at speeds greater than 30 mph (48
km/h), see your authorized dealer as soon as possible to
have the problem diagnosed and corrected.

NOTE:
The ESP/TCS Indicator Light and the ESP/BAS
Warning Lamp come on momentarily each time the
ignition switch is turned ON.
Each time the ignition is turned ON, the ESP System
will be ON even if it was turned off previously.
The ESP Control System will make buzzing or clicking sounds when it is active. This is normal; the sounds will stop when ESP becomes inactive following the maneuver that caused the ESP activation.



 

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I reformatted this. Hopefully, it is more readable.

QDII operation

NOTE:
To improve the vehicle’s traction when driving
with snow chains, or starting off in deep snow, sand, or
gravel, it may be desirable to switch to the “Partial Off”
mode by pressing the ESP switch. Once the situation
requiring ESP to be switched to the “Partial Off” mode is
overcome, turn ESP back on by momentarily depressing
the “ESP Control Switch”. This may be done while the
vehicle is in motion.

Full Off
This mode is intended for off-highway or off-road use
when ESP stability features could inhibit vehicle maneuverability
due to trail conditions. This mode is entered by
depressing and holding the “ESP Control Switch” for 5
seconds when the vehicle is stopped and the engine is
running. In this mode, all ESP and TCS stability features
are turned off except for the “limited slip” feature described in the TCS section. After 5 seconds, a chime will sound, the ESP/TCS Indicator Light will illuminate, and the ESP OFF message will appear in the Electronic Vehicle Information Center (EVIC). Refer to “Electronic Vehicle Information Center (EVIC)” in Section 4 of this
manual. (See page 186 for more information.) To turn ESP
on again, momentarily depress the ESP Control Switch.
This will restore the normal “ESP On” mode of operation.

NOTE:
The “ESP OFF” message will display and the
audible chime will sound when the gear selector is
placed into the “P” (Park) position from any position
other than “P” (Park), and then moved out of the “P”
(Park) position. This will occur even if the message was
previously cleared.

WARNING!
With the ESP switched off, the enhanced vehicle
stability offered by ESP and ERM are unavailable. In
an emergency evasive maneuver, the ESP and ERM
systems will not engage to assist in maintaining
stability. The “Full Off” ESP mode is intended for
off-highway or off-road use only.
4WD Low Range

Partial Off
This is the normal operating mode for ESP in 4WD low
range. Whenever the vehicle is started in 4WD low range,
or the transfer case (if equipped) is shifted from 4WD
high range or neutral to 4WD low range, the ESP system
will be in this mode. In 4WD low range, ESP and TCS,
except for the “limited slip” feature described in the TCS
section, are turned off until the vehicle reaches a speed of
30 mph (48 km/h). At 30 mph (48 km/h), the normal ESP
stability function returns but TCS remains off. When the
vehicle speed drops below 25 mph (40 km/h), the ESP
system shuts off. ESP is off at low vehicle speeds in 4WD
low range so that it will not interfere with off-road
driving but ESP function returns to provide the stability
feature at speeds above 30 mph (48 km/h). The ESP/TCS Indicator Light will always be illuminated in 4WD low range when ESP is off.


ESP/BAS Warning Lamp and ESP/TCS Indicator Light

The malfunction indicator lamp for the ESP is
combined with the BAS indicator. The yellow
“ESP/BAS Warning Lamp” and the yellow
“ESP/TCS Indicator Light” in the instrument
cluster both come on when the ignition switch is turned
to the “ON” position. They should go out with the engine
running.

If the “ESP/BAS Warning Lamp” comes on
continuously with the engine running, a malfunction
has been detected in either the ESP or
the BAS system, or both. If this light remains on
after several ignition cycles, and the vehicle has been
driven several miles at speeds greater than 30 mph (48
km/h), see your authorized dealer as soon as possible to
have the problem diagnosed and corrected.

NOTE:
The ESP/TCS Indicator Light and the ESP/BAS
Warning Lamp come on momentarily each time the
ignition switch is turned ON.
Each time the ignition is turned ON, the ESP System
will be ON even if it was turned off previously.
The ESP Control System will make buzzing or clicking sounds when it is active. This is normal; the sounds will stop when ESP becomes inactive following the maneuver that caused the ESP activation.
 

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Discussion Starter #7
UberCommander said:
When you say you turned off ESP, what did you do? Please give set by set.
I only turned it partially off as described above. I did not turn it fully off as I probably should have.
 

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I've never actually turned the ESP and TCS fully off. Maybe I need to find some harder trails. =)
 

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OK I have read the posts above twice, I have looked at it in the manual, and I have done some experimenting on my own with the three settings.
I still can't figure out what the different settings do exactly.
Maybe its me...
I understand that there are three different settings: On, Partial Off, and Full Off.
That doesn't mean anything because they mention ESP,ERM,TCS,BAS, and limited slip but none of these are explained in detail as to what they do and when they activate.
If anybody can explain their functionality I know I would totally appreciate it!!!!
As far as the modes go this is what I get the difference to be:

Full off:
ESP is off
ERM is off
TCS is off except for limited slip. (whatever that means)

Partial off:
ESP is off below 30mph
TCS is off except for limited slip. (whatever that means)

Now If I just knew what all the acronyms meant!!!!
 

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JJSEBASTIAN said:
I understand that there are three different settings: On, Partial Off, and Full Off.
That doesn't mean anything because they mention ESP,ERM,TCS,BAS, and limited slip but none of these are explained in detail as to what they do and when they activate.
If anybody can explain their functionality I know I would totally appreciate it!!!!


ESP = Electonic Stability Program - a suite of sensors and programs designed to keep the vehicle stable. ERM, TCS, and BAS are part of the ESP system.


ERM = Electronic Roll Mitigation - yaw and speed detectors in the vehicle sense when a vehicle is about to roll over and attempt to stop it by changing throttle and braking on specific wheels. If you use the search you will find a thread about one member's wife experiencing this first hand... and it worked.


TCS = Traction Control System - enhances mobility and prevents wheel slip when accelerating on slippery surfaces. It also provides a measure of directional stability control -- an advancement beyond prior traction control systems. Using the wheel-speed sensors, it can detect excessive yaw and help keep the car on the intended course as, for instance, when accelerating around a curve.

BAS = Brake Assist System - detects emergency braking situations (rapid deceleration based on user slamming their foot on the brake) and applys additional braking power as well as monitors the vehicle stability to adjust braking accordingly.

ELSD = the QDII system Electronic Limited Slip Differentials. The ELSDa use electronically controlled clutch packs to automatically and instantly vary from slip to lock at each axle. This maximizes traction when needed without any of the axle hop / binding issues found in a traditional locking differential.
 

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ESP - Electronic Stability Program. ESP applies selective braking and throttle input to put the vehicle back onto the driver’s intended path. The system is calibrated to offer safe control of the Commander under a variety of conditions, and to operate in a manner that is not intrusive in normal or spirited driving

TCS - Traction Control System. All-Speed TCS enhances mobility and prevents wheel slip when accelerating on slippery surfaces. It also provides a measure of directional stability control, a clear advancement beyond prior traction control systems. In addition to the brake engagement at low speeds used by conventional traction control systems, All-Speed TCS uses throttle control as well.

ERM - Electronic Rollover Mitigation. The Jeep Commander comes equipped with ERM, the next step in vehicle
stability control, to help prevent rollover crashes from occurring. ERM
monitors when a driver is about to enter a potential rollover situation,
detects the danger, and works to keep the vehicle on all four wheels. The
system rapidly applies the brakes with a high burst of pressure to the
appropriate wheel(s) to interrupt the rollover before it occurs, potentially
reducing the chance of a crash.
 

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i would go find a snow or ice covered parking lot and try out the 3 different settings.

its actually pretty cool you can shut them down.

in a parking lot try making the jeep fish tail. you will be automatically corrected and driving straight. its very weird. it doesn't seem to kick in until you start to correct. then its driving straight before you know whats going on.

in the partial mod, its almost the same as above except it seems to let you contol the vehicle a little more. it does not seem to cut out the throttle as much if you are on a slick surface, too keep the wheels from spinning.

in full off mode. you can do whatever you want. the protective measures will not kick in. the only part that still works are the limited slip features.

i have also been playing around with my switch while driving. i have noticed as long as you are not going over 10mph you can turn off the esp all the way. you can do it in neutral while coasting.
 

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I am confused when they talk how ESP automatically goes to partial off when you switch to 4WD low but comes back on when you hit 30MPH. You can't drive that fast in 4WD low with out screwing up something else. Am I missing something here?
 

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I wondered about that 30mph in 4LOW also, maybe I'm just not going fast enough in 4LOW?? =)
 

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i didn't know it did not turn the esp off all the way when you are in 4 low.

strange. i thought it was all the way off. i'll have to try to turn it all the way off and see if i can notice any real change.

if you are going 30mph you should probably be in 4-hi.
 

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slw&lw said:
I only turned it partially off as described above. I did not turn it fully off as I probably should have.

That is what I thought. When you turn it all off, you will not get those noises.

PS
I know how to turn it off Jeep5253, but thanks for posting that.
 

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Discussion Starter #18
Thanks for the post. It sounds like the noises are normal. I will make certain I turn it all the way off next time or just use 4Lo. I'm still not clear on the differences between partial off and fully off as it seems its is fully off in the partial mode as long as you are going less than 30 mph. I will just have to try turning it fully off next time and see if I notice a difference. Again, the commander did really well in the mud. I was surprised how well it handled it.
 

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Thanks for clearing that up! I have been meaning to experiment but havent found a good testing ground!
 

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ODII operation

I will revive this thread to keep from starting new, but my question is about the 4wd operation of the QDII. I have read everything and still do not understand how and when the locking occurs in the differentals, and is there a locking fuction in the power divider in high? I know it locks in low. I am wondering if the power divider lock is simular to the axele locks, electronicly controled. Which could be computer controled and lock as necessary in High.
 
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