Jeep Wrangler 2018-2025 Owners Manual / STARTING AND OPERATING / NORMAL OPERATION — DIESEL ENGINE

Jeep Wrangler: STARTING AND OPERATING / NORMAL OPERATION — DIESEL ENGINE

Observe the following when the diesel engine is operating:

All message center lights are off.
Malfunction Indicator Light (MIL) is off.
Engine Oil Pressure telltale is not illuminated.
Voltmeter operation.

The voltmeter may show a gauge fluctuation at various engine temperatures. This is caused by the glow plug heating system. The number of cycles and the length of the cycling operation is controlled by the engine control module. Glow plug heater operation can run for several minutes. Once the heater operation is complete, the voltmeter needle will stabilize.

Starting Fluids

The engine is equipped with a glow plug preheating system. If the instructions in this manual are followed, the engine should start in all conditions and no type of starting fluid should be used...

Cold Weather Precautions

Operation in ambient temperature below 32°F (0°C) may require special considerations. The following charts suggest these options: Fuel Operating Range NOTE: Use “Ultra Low Sulfur Diesel Fuels (ULSD)” ONLY...

Other information:

Jeep Wrangler 2018-2025 Owners Manual: Connecting The Jumper Cables

Connect the positive (+) end of the jumper cable to the remote positive (+) post of the discharged vehicle. Connect the opposite end of the positive (+) jumper cable to the positive (+) post of the booster battery. Connect the negative end (-) of the jumper cable to the negative (-) post of the booster battery...

Jeep Wrangler 2018-2025 Owners Manual: System Overview

Uconnect 3 With 5-inch Display Radio Button Media Button Phone Button Volume & On/Off Button Mute Button Compass Button Settings Button More Button Enter/Browse & Tune/Scroll Knob Screen Off Button Uconnect 4 With 7-inch Display Radio Button Media Button Climate Button Apps Button Controls Button Phone Button Settings Button NOTE: Uconnect screen images are for illustration purposes only and may not reflect exact software for your vehicle...

Manual Seat Height Adjustment

The driver's seat height can be raised or lowered by using the ratcheting handle, located on the outboard side of the seat. Pull upward on the handle to raise the seat, push downward on the handle to lower the seat. Several strokes may be necessary to achieve the desired position.

Jeep Wrangler. Manual Seat Height Adjustment

Seat Height Adjustment