When the battery module charge is at or below a specific value
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
When the SOC of the battery module drops, idle speed is increased in each shift position to charge the battery module. When the battery module SOC value is low, selecting the L range mode gives priority to battery module charging by lowering the IMA motor assist level, increasing the idle speed, and increasing the regeneration amount (see ELECTRONIC CONTROL SYSTEM ). Charge priority control is canceled when the battery module state-of-charge reaches about 40 percent.