Jeep Wrangler: STARTING THE ENGINE — DIESEL ENGINE (IF EQUIPPED) / Extreme Cold Weather

The engine block heater is a resistance heater installed in the water jacket of the engine. It requires a 110–115 Volt AC electrical outlet with a grounded, three-wire extension cord. Its use is recommended for environments that routinely fall below -10°F (-23°C). It should be used when the vehicle has not been running overnight or longer periods and should be plugged in two hours prior to start. Its use is required for cold starts with temperatures under -20°F (-28°C).

NOTE:

The engine block heater cord is a factory installed option. If your vehicle is not equipped, heater cords are available from an authorized Mopar® dealer.

  • A 12 Volt heater built into the fuel filter housing aids in preventing fuel gelling. It is controlled by a built-in thermostat.
  • A Diesel Pre-Heat system both improves engine starting and reduces the amount of white smoke generated by a warming engine.

    Automatic Transmission

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    Normal Starting

    Observe the instrument cluster lights when starting the engine. NOTE: Normal starting of either a cold or a warm engine is obtained without pumping or pressing the accelerator pedal...

    Other information:

    Jeep Wrangler 2018-2025 Owners Manual: Occupant Classification System (OCS) — Front Passenger Seat


    The Occupant Classification System (OCS) is part of a Federally regulated safety system for this vehicle. It is designed to activate or deactivate the Passenger Advanced Front Air Bag depending on the occupant’s seated weight. It is designed to deactivate the Passenger Advanced Front Air Bag for an unoccupied seat and for occupants whose seated weight classifies them in a category other than a properly seated adult...

    Jeep Wrangler 2018-2025 Owners Manual: Installing The Hard Top


    If the door frames are installed from soft top usage, they must be removed prior to installation of the hard top. For removal procedures. To install the hard top, place the hard top on the vehicle while making sure that the top is sitting flush with the body at the sides and check to ensure that there is a uniform gap between the lift glass and hard top...

    Categories

    Bi-Level Mode

    Jeep Wrangler. Bi-Level Mode Air comes from the instrument panel outlets and floor outlets. A slight amount of air is directed through the defrost and side window demister outlets.

    NOTE:

    Bi-Level mode is designed under comfort conditions to provide cooler air out of the panel outlets and warmer air from the floor outlets.

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