Ram 1500/2500/3500 Owners & Service Manuals

Ram 1500/2500/3500: Automatic 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 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 "Autostop" mode.

To Activate The Autostop Mode, The Following Must Occur:

1. The system must be in STOP/START READY state. A STOP/START READY message will be displayed in the Electronic Vehicle Information Center (EVIC) within the Stop/Start section. Refer to "Electronic Vehicle Information Center (EVIC)" in "Understanding Your Instrument Panel" for further information.

2. The vehicle must be completely stopped.

3. The transmission Gear Selector must be in Drive and the brake pedal depressed.

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 AUTO STOP

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 stop:

  • Driver's seat belt is not buckled
  • Driver's door is not closed
  • Outside temperature is less than 1ºF (-17ºC) or greater than 104ºF (40ºC)
  • Battery temperature too warm or cold
  • 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
  • Battery discharged
  • The transmission is not in DRIVE
  • Hood is open
  • Vehicle is in 4LO transfer case mode

Other factors which can inhibit AutoStop include: fuel level, accelerator pedal input, engine temp too high and steering angle.

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.

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