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2022 Jeep Wrangler Owners Manual - Stop/Start System — Manual Transmission (If Equipped)



Owner’s Manuals 2022 Stop/Start System — Manual Transmission (If Equipped)

Stop/Start System — Manual Transmission (If Equipped)

The Engine Stop/Start (ESS) function is developed to reduce fuel consumption. The system will stop the engine automatically during a vehicle stop if the required conditions are met. Pressing the clutch pedal will automatically restart the vehicle.

ESS vehicles have been upgraded with a heavy-duty starter, enhanced battery, and other upgraded engine parts, to handle the additional engine starts. Vehicles equipped with eTorque contain a heavy duty motor generator and an additional hybrid electric battery to store energy from vehicle deceleration for use on engine startup after a stop as well as providing launch torque assist.

Note:

It is recommended that Stop/Start be disabled during off-road use.

Secondary Battery

Your vehicle may be equipped with a secondary battery used to power the Stop/Start system and the 12 Volt vehicle electrical system. The secondary battery is located behind the wheel well for the front passenger wheel.

Battery Locations

1 — Primary Battery

2 — Secondary Battery

AUTOSTOP MODE

WARNING:

  • Vehicles with the Stop/Start system will be equipped with two batteries. Both the main and the supplemental batteries must be disconnected to completely de-energize the 12 Volt electrical system.

  • Serious injury or death could result if you do not disconnect both batteries. To learn how to properly disconnect, see an authorized dealer.

The Stop/Start feature is enabled after every driver ignition start. It will remain in STOP/START NOT READY until you drive forward with a vehicle speed greater than 5 mph (8 km/h). At that time, the system will go into STOP/START READY and if all other conditions are met, can go into an STOP/START AUTO STOP ACTIVE mode.

To Activate The STOP/START AUTOSTOP ACTIVE Mode, The Following Must Occur:

  • The system must be in STOP/START READY state. A STOP/START READY message will be displayed in the instrument cluster .

  • Vehicle speed must be less than 2 mph (3 km/h).

  • The gear selector must be in the NEUTRAL position and the clutch pedal must be fully released.

POSSIBLE REASONS THE ENGINE DOES NOT AUTOSTOP

Prior to engine shut down, the system will check many safety and comfort conditions to see if they are fulfilled. Situations when the engine will not stop include (but not limited to):

  • Driver’s seat belt is not buckled.

  • Outside temperature is less than 10°F (–12°C) or greater than 109°F (43°C).

  • Actual cabin temperature is significantly different than temperature set on Auto HVAC.

  • HVAC is set to full defrost mode.

  • Engine has not reached normal operating temperature.

  • Battery is discharged.

  • When driving in REVERSE.

  • Hood is open.

  • Transfer case is in 4L or N (Neutral).

  • Driver's seat is not occupied or driver’s door is open.

  • Vehicle is at high altitude.

  • The vehicle is on a steep grade.

  • Forward Gear is engaged.

  • Steering angle is beyond threshold (ESS Models Only).

  • System fault is present.

  • HVAC is set to MAX A/C.

It may be possible for the vehicle to be driven several times without the Stop/Start system going into a STOP/START READY state under more extreme conditions of the items listed previously.

TO START THE ENGINE WHILE IN AUTOSTOP MODE

When the gear selector is in NEUTRAL, the engine will start when the clutch pedal is pressed (does not require complete/full pedal press). The vehicle will go into STOP/START SYSTEM NOT READY mode until the vehicle speed is greater than 5 mph (8 km/h).

Conditions that will cause the engine to start automatically while in STOP/START AUTOSTOP ACTIVE mode

The Engine Will Start Automatically When:

  • Actual cabin temperature is significantly different than temperature set on Auto HVAC.

  • HVAC is set to full defrost mode.

  • HVAC system temperature or fan speed is manually adjusted higher.

  • Stop/Start Autostop Active time exceeds five minutes.

  • Battery voltage drops too low.

  • Vehicle is moving faster than 5 mph (8 km/h).

  • STOP/START OFF switch is pressed.

  • Transfer case is in 4L or N (Neutral).

  • Steering wheel is turned beyond threshold (ESS Models Only).

TO MANUALLY TURN OFF THE STOP/START SYSTEM

  1. Push the Stop/Start OFF switch (located on the switch bank). The light on the switch will illuminate.

    Stop/Start OFF Switch

  2. The STOP/START OFF message will appear in the instrument cluster .

  3. At the next vehicle stop (after turning off the Stop/Start system), the engine will not be stopped.

  4. If the Stop/Start system is manually turned off, the engine can only be started and stopped by cycling the ignition switch.

  5. The Stop/Start system will reset itself back to an ON condition every time the ignition is turned off and back on.

TO MANUALLY TURN ON THE STOP/START SYSTEM

Push the Stop/Start OFF switch (located on the switch bank). The light on the switch will turn off.

SYSTEM MALFUNCTION

If there is a malfunction in the Stop/Start system, the system will not shut down the engine. A “SERVICE STOP/START SYSTEM” message and a yellow Stop/Start telltale will appear in the Instrument Cluster Display.

If the “SERVICE STOP/START SYSTEM” message appears in the instrument cluster display, have the system checked by an authorized dealer.

If a malfunction occurs during an autostop, the vehicle may not auto start and will need a key start.

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