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2020 Jeep Grand Cherokee Owners Manual - DRIVING TIPS



DRIVING TIPS

On-Road Driving Tips

Utility vehicles have higher ground clearance and a narrower track to make them capable of performing in a wide variety of off-road applications. Specific design charac- teristics give them a higher center of gravity than conven- tional passenger cars.

An advantage of the higher ground clearance is a better view of the road, allowing you to anticipate problems. They are not designed for cornering at the same speeds as conven- tional passenger cars any more than low-slung sports cars are designed to perform satisfactorily in off-road conditions. Avoid sharp turns or abrupt maneuvers. As with other vehi- cles of this type, failure to operate this vehicle correctly may result in loss of control or vehicle rollover.

NOTE:

Prior to off-road driving with non-Summit models that are also equipped with an Off Road Package, remove the lower fascia to prevent damage. The lower fascia is attached to the lower part of the front fascia with seven quarter turn fasteners and can be removed by hand. The front license plate bracket must be removed first if equipped.

Front Air Dam

    — Front Bumper
    — Front Air Dam Fasteners

NOTE:

On Summit models the lower front fascia is not removable.

Lower Front Fascia Removal:

    Remove the seven quarter turn fasteners.
    Starting on one side of the vehicle, disengage lower fascia from the upper fascia. Grasp the portion inside the wheel well. Pulling it downwards and toward you, separate the tabs from the slots in the upper fascia.
    Continue working your way across the vehicle, sepa- 5

rating the remaining tabs from the slots in the upper fascia.

NOTE:

Do not allow the lower fascia to freely hang from the tabs in the opposite corner as damage to lower and upper fascia may result.

    Store the lower fascia in a safe location.

NOTE:

It is recommend to also remove the radar sensor on vehicle equipped to Adaptive Cruise Control (ACC). This radar sensor is specifically calibrated to your vehicle and is not interchangeable with other radar sensors.

Radar Sensor Removal Procedure (If Equipped With Adaptive Cruise Control [ACC]):

    With the lower fascia removed, which provides access to the sensor and bracket, disconnect the wiring harness from the sensor.
    Using a suitable tool, disconnect the wire clip from the bracket.

NOTE:

Before the next step, it is recommended to scribe location to assist in reinstallation.

    Using a suitable tool, remove the two fasteners that hold the sensor bracket to the bumper beam.

    — Inside Bumper Beam

Bumper Beam

    Locate the protective connector on the rear of the bumper beam.
    — Protective Connector Location 3 — Sensor Bracket Fasteners

4 — Sensor Bracket

NOTE:

Only models with the Off Road Package are equipped with the a protective connector.

    Remove the plug from the protective connector and install on the sensor.
    Insert the wiring harness connector into the protective connector.
    Store sensor and bracket in a safe place.

NOTE:

All Speed Control functions will be disabled when the radar sensor is disconnected.

Radar Sensor Installation Procedure (If Equipped With Adaptive Cruise Control [ACC]):

    Disconnect the wiring harness connector from the protec- tive connector on the bumper beam.
    Remove plug from radar sensor and install in protective connector.
    Using the previously scribed marks, reinstall the radar sensor and bracket using the two fasteners.

NOTE:

Some alignment may be required upon fascia installation to align sensor with fascia.

    Install the wiring harness connector into the radar sensor.

NOTE:

If you receive a fault, see an authorized dealer they may need to perform a sensor alignment.

Lower Front Fascia Installation NOTE:

This will only work if you have a helper.

    Starting at the center of the vehicle, engage a sufficient number of tabs to support the weight of the lower fascia (typically one or two tabs) into the upper fascia.
    Working your way outward, engage the tabs into the slots on one side of the vehicle.
    Return to the center of the vehicle and repeat Step 2 to the 5

opposite side of the vehicle.

NOTE:

    It may be necessary to apply additional force to indi- vidual tabs to make sure they are fully engaged.
    Do not use any tools to apply additional force to the tabs as damage to the upper and lower fascias may result.
    Reinstall the seven quarter turn fasteners.

When off-roading, it is recommended that the lowest useable vehicle height that will clear the current obstacle or terrain be selected. The vehicle height should then be raised as required by the changes in terrain.

The Selec-Terrain switch will automatically change the vehicle to the optimized height based on the Selec-Terrain switch posi- tion. The vehicle height can be changed from the default height for each Selec-Terrain mode by normal use of the air suspension switches. Refer to “Four Wheel Drive Operation” in “Starting And Operating” for further information.

When off-road driving, shift to 4WD LOW for additional traction. This range should be limited to extreme situations such as deep snow, mud, or sand where additional low speed pulling power is needed. Vehicle speeds in excess of 25 mph (40 km/h) should be avoided when in 4WD LOW range.

Although your vehicle is capable of driving through water, there are a number of precautions that must be considered before entering the water.

NOTE:

Your vehicle is capable of water fording in up to 20 inches (51 cm) of water, while crossing small rivers or streams. To maintain optimal performance of your vehicle's heating and ventilation system it is recommended to switch the system into recirculation mode during water fording.

Driving through water more than a few inches/centimeters deep will require extra caution to ensure safety and prevent damage to your vehicle. If you must drive through water, try to determine the depth and the bottom condition (and loca- tion of any obstacles) prior to entering. Proceed with caution and maintain a steady controlled speed less than 5 mph (8 km/h) in deep water to minimize wave effects.

Flowing Water

If the water is swift flowing and rising (as in storm run-off), avoid crossing until the water level recedes and/or the flow rate is reduced. If you must cross flowing water avoid depths in excess of 9 inches (23 cm). The flowing water can erode the streambed, causing your vehicle to sink into deeper water. Determine exit point(s) that are downstream of your entry point to allow for drifting.

Standing Water

Avoid driving in standing water deeper than 20 inches (51 cm), and reduce speed appropriately to minimize wave effects. Maximum speed in 20 inches (51 cm) of water is less than 5 mph (8 km/h).

Maintenance

After driving through deep water, inspect your vehicle fluids and lubricants (engine oil, transmission oil, axle, transfer case) to assure the fluids have not been contami- nated. Contaminated fluid (milky, foamy in appearance) should be flushed/changed as soon as possible to prevent component damage.

In heavy snow, when pulling a load, or for additional control at slower speeds, shift the transmission to a low gear and shift the transfer case to 4WD LOW if necessary. Refer to “Four-Wheel Drive Operation” in “Starting and Operating” for further information. Do not shift to a lower gear than necessary to maintain forward motion. Over-revving the engine can spin the wheels and traction will be lost.

Avoid abrupt downshifts on icy or slippery roads, because engine braking may cause skidding and loss of control.

NOTE:

Before attempting to climb a hill, determine the conditions at the crest and/or on the other side.

Before climbing a steep hill, shift the transmission to a lower gear and shift the transfer case to 4WD LOW. Use first gear and 4WD LOW for very steep hills.

If you stall or begin to lose forward motion while climbing a steep hill, allow your vehicle to come to a stop and imme- diately apply the brakes. Restart the engine, and shift into REVERSE (R). Back slowly down the hill, allowing the compression braking of the engine to help regulate your speed. If the brakes are required to control vehicle speed, apply them lightly and avoid locking or skidding the tires.

Remember, never drive diagonally across a hill. Always drive straight up or down.

If the wheels start to slip as you approach the crest of a hill, ease off the accelerator and maintain forward motion by turning the front wheels slowly. This may provide a fresh “bite” into the surface and will usually provide traction to complete the climb.

When descending mountains or hills, use Hill Descent Control or Selec-Speed Control to avoid repeated heavy braking.

If not equipped with Hill Descent Control or Selec-Speed Control use the following procedure:

Shift the transmission into a low gear, and the transfer case into 4WD LOW range. Let the vehicle go slowly down the hill with all four wheels turning against engine compression drag. This will permit you to control the vehicle speed and direction.

When descending mountains or hills, repeated braking can cause brake fade with loss of braking control. Avoid repeated heavy braking by downshifting the transmission whenever possible.

Off-road operation puts more stress on your vehicle than does most on-road driving. After going off-road, it is always a good idea to check for damage. That way you can get any problems taken care of right away and have your vehicle ready when you need it.

    Completely inspect the underbody of your vehicle. Check tires, body structure, steering, suspension, and exhaust system for damage.
    Inspect the radiator for mud and debris and clean as required.
    Check threaded fasteners for looseness, particularly on the chassis, drivetrain components, steering, and suspension. Retighten them, if required, and torque to the values spec- ified in the Service Manual.
    Check for accumulations of plants or brush. These things could be a fire hazard. They might hide damage to fuel lines, brake hoses, axle pinion seals, and propeller shafts.

    After extended operation in mud, sand, water, or similar dirty conditions, have the radiator, fan, brake rotors, wheels, brake linings, and axle yokes inspected and cleaned as soon as possible.

5

    If you experience unusual vibration after driving in mud, slush or similar conditions, check the wheels for impacted material. Impacted material can cause a wheel imbalance and freeing the wheels of it will correct the situation.

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