The Doc
Active Member
I would think EPA requires all systems need to be active and on upon ignition start up for it to be counted towards the claimed MPG.My understanding is they offer this if a customer asks for it only as a dealer programmable option and they started doing this in 2012. Eventually they made 'default to last state' standard.
Five years later I have not heard of any other car-maker offering this.
I have not heard of complaints about the car hesitating or jerking in the ESS system in the Cherokee. It should be very smooth and seamless. Also in total stop and go it will not even engage. If it doesn't reach the 5MPH threshold after the previous auto-stop it won't auto stop. There's a lot of instances it won't auto stop.
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. Detailed information about the operation of the Stop/ Start system may be viewed in the DID Stop/Start Screen. In the following situations, the engine will not stop:
Other Factors Which Can Inhibit Autostop Include
- Driver’s seat belt is not buckled.
- Driver’s door is not closed.
- Battery temperature is too warm or cold.
- Battery charge is low.
- The vehicle is on a steep grade.
- Cabin heating or cooling is in process and an accept- able cabin temperature has not been achieved.HVAC is set to full defrost mode at a high blower speed.
- HVAC set to MAX A/C.
- Engine has not reached normal operating temperature.
- The transmission is not in a forward gear.
- Hood is open.
- Vehicle is in 4LO transfer case mode
- Brake pedal is not pressed with sufficient pressure.
- Accelerator pedal input
- Engine temp too high
- 5 MPH threshold not achieved from previous AUTO- STOP.
- Steering angle beyond threshold.
- ACC is on and speed is set.
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