•  The heater system warms the front/rear heater core using the engine coolant warmed while the engine is operating, and warms the air passing through the front/rear heater core.

•  The heater system intakes a portion of the warmed engine coolant into the front/rear heater core and circulates it.

1.  Engine coolant flows into the front/rear heater core by the operation of the water pump.

2.  When the warmed engine coolant circulates in the front/rear heater core, the front/rear heater core warms up.

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3.  The air passing through the warmed front/rear heater core is warmed by heat exchange.

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