Ride Control Systems
Traction Control/Electronic Stability Control System Operation
The vehicle has a Traction Control System (TCS) and StabiliTrak/Electronic Stability Control (ESC). These systems help limit wheel spin and assist the driver in maintaining control, especially on slippery road conditions. TCS activates if it senses that any of the drive wheels are spinning or beginning to lose traction. When this happens, TCS applies the brakes to the spinning wheels and reduces engine power to limit wheel spin. StabiliTrak/ESC activates when the vehicle senses a difference between the intended path and the direction the vehicle is actually traveling. StabiliTrak/ESC selectively applies braking pressure to any one of the vehicle
wheel brakes to assist the driver in keeping the vehicle on the intended path. Trailer Sway Control (TSC) is also on automatically when the vehicle is started. See Trailer Sway Control (TSC) 0 305. If cruise control is being used and traction control or StabiliTrak/ESC begins to limit wheel spin, cruise control will disengage. Cruise control may be turned back on when road conditions allow. Both systems come on automatically when the vehicle is started and begins to move. The systems may be heard or felt while they are operating or while performing diagnostic checks. This is normal and does not mean there is a problem with the vehicle. It is recommended to leave both systems on for normal driving conditions, but it may be necessary to turn TCS off if the vehicle gets stuck in sand, mud, ice, or snow. See If the Vehicle Is Stuck 0 204 and “Turning the Systems Off and On” later in this section. When the transfer case (if equipped) is in Four-Wheel Drive Low, the TCS and StabiliTrak/ESC are automatically disabled, g
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comes on, and the appropriate message will appear on the Driver Information Center (DIC).
The indicator light for both systems is in the instrument cluster. This light will: . Flash when TCS is limiting wheel spin. . Flash when StabiliTrak/ESC is activated. . Turn on and stay on when either system
is not working. See Traction Control System (TCS)/StabiliTrak Light 0 119. If either system fails to turn on or to activate, a message displays in the DIC, and d comes on and stays on to indicate that the system is inactive and is not assisting the driver in maintaining control. Without the assistance of properly functioning StabiliTrak/ESC the possibility of rollover is increased. Adjust driving accordingly. If d comes on and stays on: 1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds. 3. Start the engine. Drive the vehicle. If d comes on and stays on, see your dealer.
Turning the Systems Off and On
The button for TCS and StabiliTrak/ESC is on the instrument panel to the left of the steering wheel.
Caution
Do not repeatedly brake or accelerate heavily when TCS is off. The vehicle driveline could be damaged.
To turn off only TCS, press and release g. The traction off light i displays in the instrument cluster. The appropriate message will display in the DIC. To turn TCS on again, press and release g. The traction off light i displayed in the instrument cluster will turn off. If TCS is limiting wheel spin when g is pressed, the system will not turn off until the wheels stop spinning. To turn off both TCS and StabiliTrak/ESC, press and hold g until the traction off light i and the StabiliTrak OFF light g come on and stay on in the instrument cluster, then release. The appropriate message will display in the DIC. To turn TCS and StabiliTrak/ESC on again, press and release g. The traction off light i and the StabiliTrak OFF light g in the instrument cluster turn off. For vehicles without four corner air suspension StabiliTrak/ESC will automatically turn on if the vehicle exceeds 56 km/h (35 mph). Traction control will remain off.
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For vehicles with four corner air suspension StabiliTrak/ESC will automatically turn on if the vehicle exceeds 32 km/h (20 mph). The vehicle has a Trailer Sway Control (TSC) feature and a Hill Start Assist (HSA) feature. See Trailer Sway Control (TSC) 0 305 or Hill Start Assist (HSA) 0 225. Adding accessories can affect the vehicle performance. See Accessories and Modifications 0 318.
Hill Descent Control (HDC)
If equipped, Hill Descent Control (HDC) sets and maintains vehicle speed while driving down steep grades in a forward or reverse gear. The HDC switch is on the instrument panel to the left of the steering wheel.
Press 5 to enable or disable HDC. Vehicle speed must be below 60 km/h (37 mph).
When enabled, the HDC light displays on the instrument cluster. A blinking HDC light indicates the system is actively applying the brakes to maintain vehicle speed. HDC can maintain vehicle speeds between 1 and 30 km/h (1 and 19 mph) on grades greater than or equal to 5%.
If HDC is to be used for more than three minutes or on grades steeper than 25%, the transfer case should be put into Four-Wheel Drive Low (4 n) to reduce the possibility of brake overheating. Noise from the hydraulic brake control module is normal when HDC is active. When HDC is activated, the initial HDC speed is set to the current driving speed. It can be increased or decreased by pressing +RES or SET- on the steering wheel, or by applying the accelerator or brake pedal. This adjusted speed becomes the new set speed. HDC will remain enabled between 30 and 60 km/h (19 and 37 mph); however, vehicle speed cannot be set or maintained in this range. HDC will automatically disable if the vehicle speed is above 80 km/h (50 mph) or above 60 km/h (37 mph) for at least 30 seconds. 5 must be pressed again to re-enable HDC. HDC may disable after an extended period of use. If this happens, HDC will require time to cool down. The length of time HDC remains active depends on road conditions, grade, set speed, vehicle loading, and outside temperature.
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When enabled, if the vehicle speed is above 30 km/h (19 mph) and below 60 km/h (37 mph), a DIC message will display.
Driver Mode Control
Driver Mode Control (DMC) allows the driver to adjust the overall driving experience to better suit preference by adjusting multiple subsystems simultaneously. Drive Mode availability and affected vehicle subsystems are dependent upon vehicle trim level, region, and optional features. Normal Mode is the default mode every time the vehicle is started. A unique and persistent indicator is displayed in the instrument cluster for each mode. Depending on trim level, Normal, Sport, Snow/Ice, Off-Road, Tow/Haul, and Terrain modes may be available.
To activate each mode, turn the Mode knob on the instrument cluster to the left of the steering wheel.
To activate Terrain Mode, press the Terrain Mode button located next to the Mode knob.
Normal Mode : Use this mode for normal city and highway driving to provide a smooth ride. This setting provides balance between comfort and handling. This is the standard/default mode. There is no persistent indicator in the instrument cluster for this mode. 8 Sport Mode : Use this mode where road conditions or personal preference demand a more controlled response. When in Sport Mode the vehicle automatically down shifts. In this mode, the vehicle also monitors driving behaviors and automatically enables Performance Shift Features when spirited driving is detected. These features maintain lower transmission gears to increase available engine braking and improve acceleration response. The vehicle resumes normal operation after a short period when no spirited driving is detected. The steering changes to provide precise control.
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6 Snow/Ice Mode : Use this mode to improve vehicle acceleration on snow and ice covered roads. When active, Snow/Ice Mode adjusts acceleration to optimize traction on slippery surfaces. This can compromise the acceleration on dry asphalt. This feature is not intended for use when the vehicle is stuck in sand, mud, ice, snow, or gravel. If the vehicle becomes stuck, see If the Vehicle Is Stuck 0 204. 7 Off-Road Mode : Use this mode for off-road recreational driving. Off-Road Mode should be used to improve driving at moderate speeds, on grass, gravel, dirt, unpaved roads, or snow-covered roads. The accelerator pedal is tuned for off-road use. This mode modifies pedal mapping, ride height, and Traction Control System (TCS) performance. For more information on off-road driving, see Off-Road Driving 0 198. _ Tow/Haul Mode : Use this mode when hauling heavy loads to provide increased performance and vehicle control. Tow/Haul Mode adjusts the transmission shift pattern, steering, and Electronic Stability Control (ESC) performance.
If the vehicle is turned off while in Tow/ Haul Mode and then restarted within four hours or less, it will remain active. Otherwise, the vehicle will start in Normal Mode. If the vehicle has a diesel engine, exhaust braking is automatically activated when Tow/Haul Mode is selected. It maintains vehicle speed by automatically implementing a shift pattern that uses the engine and the transmission to slow the vehicle. The system will command downshifts and use the turbo charger on the engine to reduce vehicle speed when the brake is applied. The normal Tow/Haul shift pattern will return once the vehicle is on a low grade or when the accelerator pedal is pressed. For more information, see Towing Equipment 0 296 or Transporting a Disabled Vehicle 0 386.
If equipped, select Terrain Mode by pressing theg below the 4 m transfer case button. g Terrain Mode : Use this mode when traveling on very rough roads at very low speeds, such as a two-track or heavily rutted road. This mode can also be used for pulling a boat out of the water on a trailer. When in Terrain Mode, the vehicle shifts automatically, but will hold a lower gear longer to maximize engine torque. This mode has a unique pedal map and transmission shift pattern for better control at lower speeds and over rough terrain. This mode modifies accelerator pedal mapping, transmission shift pattern, ride height, and electronic Limited Slip Differential (eLSD).
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When the vehicle comes to a stop on an upward grade, automatic vehicle hold is engaged until the driver presses the accelerator pedal. Stop/Start and cruise control are disabled in Terrain Mode. Active Braking during lift throttle will be engaged. This feature automatically applies light braking to simulate heavy engine braking of four-wheel-dive low. It also applies light braking in D (Drive) until the vehicle is at idle speeds. In L1 and L2 light braking will typically bring the vehicle to a stop. Active Braking during lift throttle also reduces trailer braking. Terrain Mode automatically exits to Normal Mode if the brake temperatures become too hot, electronic parking brake becomes inoperable, or the vehicle cannot perform braking or vehicle hold. For more information on off-road driving, see Off-Road Driving 0 198 and Hill and Mountain Roads 0 202.
Terrain Mode Drive Select Expected Vehicle Behavior Ideal Terrain
Drive (L3-Lx)
Minor deceleration when off throttle and mild ability to modulate throttle; mimics performance of 4 n without torque multiplication.
Grassy fields, mild two tracks, rutted roads, large rolling hills
L2 Moderate deceleration when off throttle and moderate ability to modulate throttle; brings vehicle to a stop in most cases.
Mild rock crawling, heavy ruts, short, steeper grades
L1 Significant deceleration when off throttle and significant ability to modulate throttle; brings vehicle to a stop in most cases.
Rock crawling downhill
Vehicle Hold Features . When the vehicle comes to a stop on an
incline grade in forward gear or on a decline grade in reverse gear, Vehicle Hold is engaged until the accelerator pedal is pressed.
. When the vehicle is in forward gear on a decline, the vehicle will creep down the hill when the brake pedal is released
without pressing the accelerator pedal. The vehicle will also creep forward on flat ground.
. If the driver seat belt is removed and the driver door is opened while the vehicle is being held, Electric Parking Brake (EPB) is engaged.
. EPB engages if the vehicle is held for an extended period.
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Terrain Mode is only available on vehicles equipped with the single speed transfer case. Terrain Mode can only be active when: . Vehicle speed is less than 80 km/h
(50 mph). . The transfer case is in 4 m. Frequent use of this mode may cause brake wear due to the light braking. The vehicle automatically exits the mode if the brakes get too hot. Terrain Mode can be turned back on after the brakes have cooled. When Terrain Mode is selected: . Auto Engine Start/Stop is disabled. . The Terrain Mode indicator displays on
the instrument cluster.
Magnetic Ride Control
This vehicle may have a semi-active damping system called Magnetic Ride Control. With this feature, improved vehicle ride and handling is provided under a variety of passenger and loading conditions.
Locking Rear Axle
Vehicles with a locking rear axle can give more traction on snow, mud, ice, sand, or gravel. It works like a standard axle most of the time, but when traction is low, this feature will allow the rear wheel with the most traction to move the vehicle.
Four Corner Air Suspension System
The Four Corner Air Suspension feature provides full time load leveling capability along with the benefit of adjusting ride height for increased convenience and capability.
Warning
To help avoid personal injury or death, make sure the area underneath the vehicle and inside the wheel wells is clear when lowering the vehicle.
Warning
To help avoid personal injury or death, always select the lowest ride height for the current driving conditions. Higher ride heights raise the vehicle's center of gravity, increasing the chance of a rollover during extreme maneuvers.
Warning
Heavy loads on the roof rack will make the vehicle's center of gravity higher, increasing the possibility of a rollover. To avoid losing control of the vehicle, always select the normal height setting and avoid high speeds, sudden starts, sharp turns, sudden braking, or abrupt maneuvers when carrying cargo on the roof rack.
232 Driving and Operating Changing Ride Height
Press the Ride Height button to open the Ride Height Menu on the Instrument Panel.
Turn the knob left or right to select the desired ride height in the menu. To finalize the selection, either press the Ride Height button again or wait three seconds for the menu to timeout. Ride Heights that are unavailable for selection will be greyed out in the menu.
Ride Height Descriptions
Normal Height is the standard vehicle height used for everyday driving.
Entry/Exit Height
Entry/Exit Height is 50 mm (2 in) lower than Normal Height. This ride height lowers the vehicle for easy entry and exit from the vehicle as well as providing a lower height for loading and unloading cargo from any door or the rear liftgate. This ride height can be selected in the Ride Height Menu at any vehicle speed. When Entry/Exit Height is selected at higher speeds, the vehicle will wait to lower until the vehicle slows to less than 12 km/h (7 mph). The vehicle will automatically raise to Normal Height from Entry/Exit Height when speed increases above 8 km/h (5 mph). If no door has been opened since lowering to Entry/Exit Height, the vehicle will wait to
raise to Normal Height until 30 km/h (19 mph). This gives the driver more flexibility when lowering to Entry/Exit Height for passenger pick up and drop off. The driver can enable Automatic Entry/ Egress Mode to automatically lower to Entry/Exit Height when the vehicle is shifted to P (PARK). Automatic Entry/Egress Mode may be enabled via the infotainment screen under Settings/Vehicle/Ride Height. When the vehicle is higher than Normal Height, Automatic Entry/Egress Mode is disabled. When the vehicle is in Tow/Haul Driver Mode, Off-Road Driver Mode, or it senses a trailer is connected, Automatic Entry/Egress Mode is disabled.
Increased Height
Increased Height is 25 mm (1 in) higher than Normal Height. This ride height raises the vehicle for off-road use, allows for higher speeds than Maximum Height, and is only available with specific optional content. Increased Height can be selected in the Ride Height Menu while vehicle speed is less than 80 km/h (50 mph). If vehicle speed exceeds 80 km/h (50 mph), the vehicle will automatically lower to Normal Height.
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Off-Road Driver Mode and Terrain Driver Mode will automatically set Increased Height when vehicle speed is less than 80 km/h (50 mph). If vehicle speed exceeds 80 km/h (50 mph), the vehicle will lower to Normal Height. Normal Height will be maintained until vehicle speed is slowed to less than 16 km/h (10 mph) and then the vehicle will automatically raise back to Increased Height. The vehicle will automatically lower from Increased Height to Normal Height to provide improved stability if aggressive maneuvers are detected.
Maximum Height
Maximum Height is 50 mm (2 in) higher than Normal Height. This ride height raises the vehicle for off-road use and is only available with specific optional content. To raise the vehicle to Maximum Height, first shift the transfer case to 4 n. Once the transfer case is in 4 n and vehicle speed is less than 48 km/hr (30 mph), select Maximum Height in the Ride Height Menu. If vehicle speed exceeds 48 km/h, the vehicle will automatically lower to Increased Height.
The vehicle will automatically lower from Maximum Height to Normal Height to provide improved stability if aggressive maneuvers are detected.
Aerodynamic Height
Aerodynamic Height is 20 mm (0.75 in) lower than Normal Height. This ride height lowers the vehicle at higher vehicle speeds to improve aerodynamics. The vehicle will lower to Aerodynamic Height when vehicle speed exceeds 105 km/h (65 mph) for a period of time. The vehicle will raise to Normal Height when the vehicle slows to less than 48 km/h (30 mph). Aerodynamic Height is automatically disabled when a trailer is connected to the vehicle or Tow/Haul Driver Mode is active.
Suspension Modes
The air suspension has two special modes located in the infotainment screen under Settings/Vehicle/Suspension. When either is active, the following amber icon will be illuminated in the instrument cluster.
See Four Corner Air Suspension Light 0 120.
Service Mode
Service Mode will disable all air suspension operation including raising and lowering the vehicle and operation of the air compressor. This mode is useful when the vehicle is being towed on a flat bed or when any work under the vehicle is being performed. Service Mode is automatically enabled when the vehicle is put on a hoist or a floor jack is used to raise a corner. Service Mode may temporarily enable during intense off-road situations to prevent damaging air suspension activity. Service Mode automatically disables when vehicle speed exceeds 16 km/h (10 mph).
Alignment Mode
Alignment Mode will optimize the vehicle height to provide the most accurate wheel alignment. This mode should be enabled once the vehicle is driven onto the alignment station.
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To enable Alignment Mode, ensure the vehicle is at Normal Height and shift the vehicle to Neutral. Alignment Mode automatically disables when vehicle speed exceeds 16 km/h (10 mph).
Air Suspension Operation with Door(s) or Hood Open
The air suspension will temporarily suspend all height changes while the hood or any door is open. The air suspension resumes height changes once the hood and all doors are closed. An open rear liftgate does not suspend the air suspension operation.
System Over-Temperature
If the air suspension is under heavy use, the system may temporarily suspend all height changes to allow compressor cooldown. When this occurs and a height change is requested, a ‘Leveling System Unavailable’ message will be displayed in the instrument cluster.
Suspension Lowered for Stability
In the event of a loss of Electronic Stability Control, the air suspension will lower the vehicle at higher speeds to provide increased stability. This will be accompanied by a ‘Vehicle Lowering for Stability’ message in the instrument cluster.
Excessive Vehicle Loading
If the air suspension detects excessive vehicle loading, it will not raise above Normal Height.
Air Suspension Service
If a ‘Service Leveling System’ message is displayed in the instrument cluster, see your authorized dealer immediately.
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