Blower Motor Control Module

The blower motor and the blower motor speed control are combined into one assembly called the blower motor control module. The blower motor pulls air from the air inlet and forces it into the climate control housing and the plenum chamber where it is mixed and distributed. The blower motor speed control uses a PWM signal from the HVAC Control Module to determine the desired blower speed and varies the ground feed for the blower motor to control the speed.

Cabin Coolant Heater System 

The cabin coolant heater circuit provides warm coolant to the heater core to warm the passenger compartment. A SOBDMC controlled cabin coolant heater warms the coolant. The cabin heater diverter valve allows warm coolant from the electric motor circuit, when available, to enter the cabin heater circuit to provide warm coolant for cabin heat. The upper temperature limit for the cabin heater circuit is 80°C (176°F). The cabin heater coolant temperature sensor, [ ECT sensor], in the cabin heater circuit provides the PCM with coolant temperature information. For additional information on the electric powertrain cooling system, Refer to: Electrified Drivetrain Cooling . Refer to: Electrified Drivetrain Cooling .

An auxiliary high voltage cable connects the high voltage battery to each of the high voltage components: cabin coolant heater, ACCM, DC/DC and Battery Charger Control Module (BCCM) also known as the SOBDM. Two circuits supply high voltage to the DC/DC and two separate circuits supply high voltage to the cabin coolant heater. The DC/DC acts as a pass through and sends high voltage to the SOBDM. The cabin coolant heater acts as a pass through and sends high voltage to the ACCM (air conditioning control module). [The high voltage low current fuse, mounted in the high voltage battery junction box, supplies voltage to the cabin coolant heater and ACCM (air conditioning control module)]. For additional information on the high voltage battery, mounting and cable system, Refer to: High Voltage Battery, Mounting and Cables - Vehicles With: LG Extended Range Battery/LG Standard Range Battery - System Operation and Component Description .