2021 RAM 1500 Owners Manual - STOP/START SYSTEM — IF EQUIPPED

STOP/START SYSTEM — IF EQUIPPED

The Stop/Start function is developed to save fuel and reduce emissions. The system will stop the engine automatically during a vehicle stop if the required conditions are met. Releasing the brake pedal or shifting out of DRIVE will automatically restart the engine.

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.

AUTOSTOP MODE

The Stop/Start feature is enabled after every normal customer engine start. It will remain in STOP/START NOT READY until you drive forward with a vehicle speed greater than

2 mph (3 km/h). At that time, the system will go into STOP/START READY.

The system must be in STOP/START READY state. A STOP/START READY message will be displayed in the instrument cluster within the Stop/Start section page 114.

The vehicle must be completely stopped.

The transmission gear selector must be in DRIVE 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 an Autostop. While in an Autostop, the Climate Controls system may automatically adjust airflow to maintain cabin comfort. Customer settings will be maintained upon return to an engine running condition.

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. In following situations, the engine will not Autostop:

Driver’s seat belt is not buckled

Driver’s door is not closed 4

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

Engine has not reached normal operating temperature

Engine temperature too high

The battery is charging

The transmission is not in DRIVE

Hood is open

Transfer case is in 4WD LOW

TOW/HAUL mode is selected

Accelerator pedal input

Excessive 12 Volt loads

It may be possible to operate the vehicle several consecutive times in extreme conditions and not meet all criteria to enable an Autostop state.

TO START THE ENGINE WHILE IN AUTOSTOP MODE

While in DRIVE, the engine will start when the brake pedal is released or the throttle pedal is pressed and the transmission will automatically reengage upon engine restart.

The engine will start automatically when:

The transmission selector is moved from DRIVE to REVERSE, NEUTRAL, or PARK

To maintain cabin temperature near the HVAC settings

HVAC is set to full defrost mode

12 Volt demand requires engine restart

Stop/Start OFF switch is pushed

Transfer case is in 4WD LOW

The emissions system override is present

A Stop/Start system error present

The engine will not start automatically and the transmission will be placed in PARK if:

The driver door is open and brake pedal released

The driver door is open and the driver seat belt is unbuckled

The engine hood has been opened

A Stop/Start system error present

The engine may then be restarted by moving the transmission shift selector out of PARK (e.g. to DRIVE) or, in some cases, only by a KEY START. The instrument cluster will display a SHIFT OUT OF PARK message, or a STOP/START KEY START REQUIRED message, to indicate which action is required page 114.

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

page 114.

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 will appear in the instrument cluster display page 126.

The system will need to be checked by an authorized dealer.