Jeep Wrangler: NORMAL OPERATION — DIESEL ENGINE / Cooling System Tips — Automatic Transmission

To reduce the potential for engine and transmission overheating in high ambient temperature conditions, take the following actions:

  • City Driving — When stopped, shift the transmission into NEUTRAL (N) and increase engine idle speed.
  • Highway Driving — Reduce your speed.
  • Up Steep Hills — Select a lower transmission gear.
  • Air Conditioning — Turn it off temporarily.


If the coolant temperature is too high, the A/C will automatically turn off.

Stopping The Engine

After full load operation, idle the engine for a few minutes before shutting it down. This idle period will allow the lubricating oil and coolant to carry excess heat away from the turbocharger...

Do Not Operate The Engine With Low Oil Pressure

If the low oil pressure warning light turns on while driving, stop the vehicle and shut down the engine as soon as possible. A chime will sound when the light turns on...

Other information:


PREPARE FOR THE APPOINTMENT All work to be performed may not be covered by the warranty. Discuss additional charges with the service manager. Keep a maintenance log of your vehicle's service history. This can often provide a clue to the current problem...

Jeep Wrangler 2018-2024 Owners Manual: Disconnecting The Jumper Cables

Disconnect the negative (-) end of the jumper cable from the engine ground of the vehicle with the discharged battery. Disconnect the opposite end of the negative (-) jumper cable from the negative (-) post of the booster battery. Disconnect the positive (+) end of the jumper cable from the positive (+) post of the booster battery...


Turn Signals. Lane Change Assist — If Equipped

Turn Signals

Move the multifunction lever up or down to activate the turn signals. The arrows on each side of the instrument cluster flash to show proper operation.


If either light remains on and does not flash, or there is a very fast flash rate, check for a defective outside light bulb.

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