Cabin Coolant Heater System

The cabin heater circuit provides warm coolant to the heater core to warm the passenger compartment. A SOBDMC controlled cabin coolant heater warms the coolant. The upper temperature limit for the cabin heater circuit is 90°C (194°F). The cabin coolant heater reports the coolant temperature exiting the heater to the SOBDMC through the LIN circuit. The SOBDMC relays the temperature information to the PCM through the FD-CAN. For additional information on the electric powertrain cooling system, Refer to: Refrigerant Cooling - System Operation and Component Description .

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, DCDC and Battery Charger Control Module (BCCM) also known as the SOBDM. Two circuits supply high voltage to the DCDC and two separate circuits supply high voltage to the cabin coolant heater. The DCDC 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. [The high voltage low current fuse, mounted in the high voltage battery junction box, supplies voltage to the electric cabin coolant heater and ACCM ]. For additional information on the high voltage battery, mounting and cable system, Refer to: High Voltage Battery, Mounting and Cables - Electric - Component Location .