VENTILATION, HEATING, AND AIR CONDITIONING SYSTEM
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The vehicle equiped with the DI engine has the supplemen-
tary heating devices to increase the heating effect before the
engine coolant fully warms up. The supplementary heating
devices are as follows:
-
PTC (Positive Temperature Coefficient)
SUPPLEMENTARY HEATING DEVICE
PTC
This supplementary heater is an electrical air heating
type and installed on the heater outlet port. This device
improves the heating effect by increasing the tempera-
ture of flowing air into the passenger room.
This device is operational/non-operational when the en-
gine control unit supplies/cuts off the voltage to the PTC
according to the coolant temperature and the ambient
temperature.
XX
XX
X Operational Condition
This device is activated when the blower switch is at
any position other than the “OFF” position and the cool-
ant temperature and the ambient temperature is within
a specified range.
XX
XX
X Non-operational Condition
• The blower switch is at the “OFF” position
• Defective ambient temperature sensor
• During engine cranking
• Battery voltage is too low
• During pre-glowing process (
indicator ON)
C100_RHD_09-Ventilation, Heating, and Air Conditioning System.p65 2006-05-16, ¿ÀÈÄ 8:305
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