Hybrid Modes of Operation Description: Autostart
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
The Two-Mode Hybrid vehicle does not require internal combustion engine operation at all times. After a successful engine start, the hybrid powertrain control module may turn off the engine (Autostop) when not required for the current vehicle conditions. The engine will remain off while in Autostop mode, until such time that vehicle conditions require the engine to run. The near-instant starting of the engine from Autostop mode is called Autostart. Some of the vehicle conditions that may cause the hybrid powertrain control module to exit the Autostop mode and Autostart the engine include:
- Hood switch position status changes to Open
- ECM Request
- Gear selector is placed in the Reverse or Manual position
- Hybrid battery state of charge is too low
- Hybrid battery voltage, temperature or power limits are exceeded
- Engine coolant temperature (ECT) is too low
- Drive motor generator temperature limits are exceeded
- Drive motor generator power inverter module temperature limits are exceeded
- A hybrid system fault is observed
- Electric Launch capability has been exceeded and engine operation is required
IMPORTANT:
If any of the following conditions exist while operating in Autostop, the hybrid powertrain control module may Autostart the engine without notice.