2022 Jeep Wrangler STOP/START SYSTEM — AUTOMATIC TRANSMISSION (IF EQUIPPED)
STOP/START SYSTEM — AUTOMATIC 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. Releasing the brake pedal or pressing the accelerator pedal will automatically restart the engine.
- 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 system 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
- Primary Battery
- 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. At that time, the system will go into STOP/START READY and if all other conditions are met, can go into a STOP/START AUTOSTOP ACTIVE Autostop mode.
To Activate The Autostop 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 display within the Stop/Start section page 120.
- The vehicle must be completely stopped.
- The shifter must be in forwarding gear and the brake pedal pressed.
POSSIBLE REASONS THE ENGINE DOES NOT AUTOSTOP
Prior to the engine shut down, the system will check many safety and comfort conditions to see if they are fulfilled. Detailed information about the operation of the Stop/Start system may be viewed in the instrument cluster display Stop/Start Screen. Situations when the engine will not stop include (but are not limited to):
- The driver’s seat belt is not buckled.
- The driver’s door is not closed.
- The battery temperature is too warm or cold.
- The battery charge is low.
- The vehicle is on a steep grade.
- Cabin heating or cooling is in process and an acceptable cabin temperature has not been achieved.
- The gear selector is in MANUAL (M) mode.
- HVAC is set to full defrost mode at a high blower speed.
- HVAC is set to MAX A/C.
- The engine has not reached the normal operating temperature.
- The engine or exhaust temperature is too high.
- The transmission is not in a forward gear.
- The Hood is open.
- The transfer case is in 4L or N (Neutral).
- The brake pedal is not pressed with sufficient pressure.
- Accelerator pedal input.
- The vehicle speed threshold has not been achieved from the previous Autostop.
- The steering angle is beyond the threshold (ESS Models Only).
- ACC is on and speed is set.
- The vehicle is at a high altitude.
- System fault is present.
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 above.
TO START THE ENGINE WHILE IN AUTOSTOP MODE
While in a forward gear, the engine will start when the brake pedal is released or the throttle pedal is pressed. The transmission will automatically re-engage upon engine restart.
Conditions That Will Cause The Engine To Start Automatically While In Autostop Mode:
- The transmission selector is moved out of DRIVE.
- To maintain cabin temperature comfort.
- The actual cabin temperature is significantly different than the temperature set on Auto HVAC.
- HVAC is set to full defrost mode.
- HVAC system temperature or fan speed is manually adjusted higher.
- Battery voltage drops too low.
- Stop/Start OFF switch is pushed.
- A Stop/Start system error occurs.
- Stop/Start Autostop Active time exceeds five minutes.
- The transfer case is in 4L or N (Neutral).
- The steering wheel is turned beyond the threshold (ESS Models Only).
TO MANUALLY TURN OFF THE STOP/START SYSTEM
Push the Stop/Start OFF switch (located on the switch bank). The light on the switch will illuminate. The “Stop/Start OFF” message will appear in the instrument cluster display within the Stop/Start section, and the autostop function will be disabled on page 120.
NOTE: 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 page 120.
- 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