2022 Jeep Grand Cherokee Stop/Start System User Manual

2022 Jeep Grand Cherokee Stop/Start System User Manual

STOP/START SYSTEM

The Stop/Start 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 re-start the engine. This vehicle has been upgraded with a heavy-duty starter, enhanced battery, and other upgraded engine parts, to handle the additional engine starts.

AUTOSTOP MODE

The Stop/Start feature is enabled after every normal customer engine 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 on page 99.
• The vehicle must be completely stopped.
• The gear selector must be in a forward gear and the brake pedal pressed.

The engine will shut down, the tachometer will move to the zero position and the Stop/Start telltale will illuminate indicating you are in Autostop. Customer settings will be maintained upon return to an engine running condition.

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. In the following situations, the engine will not stop:

• 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.
• 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 transmission is not in a forward gear.
• The Hood is open.
• Part-Time 4WD, 4WD Lock, 4WD LOW, or an off-road Selec-Terrain mode is selected (if equipped).
• The brake pedal is not pressed with sufficient pressure.
• Accelerator pedal input.
• The engine temperature is too high.
• 5 mph (8 km/h) threshold has not been achieved from the previous Autostop.
• The steering angle is beyond the threshold.

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.
• HVAC is set to full defrost mode.
• HVAC system temperature or fan speed is manually adjusted.
• Battery voltage drops too low.
• Stop/Start OFF switch is pushed.
• A Stop/Start system error occurs.
• Part-Time 4WD, 4WD Lock, 4WD LOW, or an off-road Selec-Terrain mode is selected (if equipped).
• The steering angle is beyond the threshold.

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 and the Autostop mode will be disabled on page 99.
NOTE: The Stop/Start system will reset itself back to the ON mode 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 on page 99.
• If the “SERVICE STOP/START SYSTEM” message appears in the instrument cluster display, have the system checked by an authorized dealer.