Hybrid Modes of Operation Description: Autostop

After a successful engine start, the hybrid powertrain control module (HPCM) may turn off the engine and operate in the Autostop mode. Some of the vehicle conditions that allow the engine to stop running and enter the Autostop mode include:

• Vehicle power mode is correct:
  • The ignition switch is in the Run position after first being turned to the crank position which resulted in a successful engine start,

    OR

  • The ignition switch is turned to the Run position after a successful remote vehicle start request.
• Hood switch position status is Closed.
• ECM is not requesting continued engine operation for diagnostic purposes.
• Gear selector is not in the Reverse or Manual position.
• Hybrid battery state of charge (SOC) is greater than 20 percent.
• Hybrid battery voltage, temperature or power limits are not exceeded.
• Engine coolant temperature (ECT) is greater than an acceptable limit.
• Drive motor generator temperature limits are not exceeded.
• Drive motor generator power inverter module (PIM) temperature limits are not exceeded.
• No hybrid system faults exist.

A chime will sound if the drivers door is opened while in Autostop as a reminder that the engine is not in the OFF mode.

Engine OFF and AUTOSTOP modes are indicated on the Drive Efficiency Gage.

• When the Drive Efficiency Gage indicates OFF, the engine is not running and will remain Off until the ignition key is placed in the Crank position or a remote vehicle start request is received from the keyless entry transmitter.
• When the Drive Efficiency Gage is in the white zone of the gage indicating AUTOSTOP, the engine is not running but may Autostart at any time without notice.