Page 243 of 751
15-430000-00
C. Operation process
The ceramic PTC has a feature that the resistance goes up very high at a certain temperature. There
are three circuits in PTC heater. Only one circuit is connected when PTC1 relay is ON, and two circuits
are connected when PTC2 relay is ON.
<00760097008c00990088009b0090009600950047009700990096008a008c009a009a006100470099008c0088008a008f008c009a00470088009b004700880047008a008c0099009b0088009000950047009b008c00940097008c00990088009b009c009900
8c02e7008f0090008e008f00470099008c009a0090009a009b>ance→low current→less heat
<00990088008b00900088009b00900096009502e7009b008c00940097008c00990088009b009c0099008c0047008b0096009e009502e7008f0090008e008f00470099008c009a0090009a009b00880095008a008c02e7008f0090008e008f0047008a009c00
990099008c0095009b02e7009b008c00940097008c00990088>ture up
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15-44
D. Control conditions
Operation Operating condition PTC Heater
HI
(PTC2)- Coolant temperature < 15℃PTC HI ON
LO
(PTC1)- Coolant temperature 15℃ ≤ 65℃, intake air
temperature ≤ -10℃
- Coolant temperature 15℃ < 65 to 60℃, intake air
temperature <-10℃ to 0℃
- Coolant temperature 15℃ ≤ 60℃, intake air
temperature ≤ 0℃ to 5℃PTC LO ON
Stop- A/C blower switch OFF
- Defective ambient air temperature sensor
(including open or short circuit)
- Engine cranking
- Low battery voltage (below 11V)
- During pre-glow process (glow indicator ON)
Operation diagram for PTC heater LO (step 2) ▶
Page 287 of 751

06-72112-01
4) Water Pump
The belt-driven centrifugal water pump consists of an impeller, a drive shaft, and a belt pulley.
The impeller is supported by a completely sealed bearing.
The water pump is serviced as an assembly and, therefore, cannot be disassembled.
5) Thermostat
A wax pellet-type thermostat controls the flow of the engine coolant through the engine cooling system.
The thermostat is mounted in the thermostat housing to the front of the cylinder head.
The thermostat stops the flow of the engine coolant from the engine to the radiator to provide faste
r
warm-up, and to regulate the coolant temperature. The thermostat remains closed while the engine
coolant is cold, preventing circulation of the engine coolant through the radiator. At this point, the engine
coolant is allowed to circulate only throughout the heater core to warm it quickly and evenly.
As the engine warms, the thermostat opens. This allows the engine coolant to flow through the radiato
r
wherethe heat is dissipated. This opening and closing of the thermostat permits enough engine coolant
to enter the radiator to keep the engine within proper engine temperature operating limits.
The wax pellet in the thermostat is hermetically sealed in a metal case. The wax element of the
thermostat expands when it is heated and contracts when it is cooled.
As the vehicle is driven and the engine warms, the engine coolant temperature increases. When the
engine coolant reaches a specified temperature, the wax pellet element in the thermostat expands and
exerts pressure against the metal case, forcing the valve open. This allows the engine coolant to flow
through the engine cooling system and cool the engine.
As the wax pellet cools, the contraction allows a spring to close the valve.
The thermostat begins to open at 87°C(188.6 °F) and is fully open at 102°C(215.6°F). The
thermostat closes at 85°C (187°F).
6) Electric Cooling Fan
Keep hands, tools, and clothing away from the engine cooling fans to help prevent personal injury.
This fan is electric and can turn on even when the engine is not running. -
If a fan blade is bent or damaged in any way, no attempt should be made to repair or reuse the
damaged part. A bent or damaged fan assembly should always be replaced with a new one to
prevent possible injury. -
Page 682 of 751
01-36810-01
1. SPECIFICATIONS
Description Specification
HeaterCore size (mm²)200 x 165.5 x 25
Capacity (kcal/h) 4,700
EvaporatorCore size (mm²)254.8 x 196.7 x 60
Capacity (kcal/h) 4,700
Blower Supplied power (W) 240 + 10% Max (at12V)
Fan speed (rpm)2900 ± 200
Supply voltage (V) 12.0
PTC Supply power (W) 900~1,050
Compressor Capacity (cc/rev) 170
Diameter of pulley (mm) 120
Max. speed (rpm) 8,000
Supply voltage (V) 12.0
Power consumption (A) 2.2
Discharge pressure (kgf/cm²G)8~10
Power transistor Supply voltage (V) 12.0
Operating temperature (℃) -30℃~60℃
ResistanceHi-Low (Ω) 2.0 Ω ± 10%
Hi-ML (Ω) 0.9 Ω ± 10%
Hi-MH (Ω) 0.4 Ω ± 10%
Page 684 of 751
01-56810-01
3. COMPONENTS
Blower and evaporator assembly
Actuator assembly - Intake
Air filter assembly
Cover - Air filter
Blower motor assembly
Resistor
Expansion valve assembly
Wiring assembly - Heater & evaporator
Heater assembly 1.
2.
3.
4.
5.
6.
7.
9.
10.Actuator assembly - Temperature
Actuator assembly - Mode
Heater assembly - PTC
Control assembly - Heater and A/C control
Bulb
Insert assembly - Ventilation
Sensor assembly - Humid and Incar
Sensor assembly - Intake 11.
12.
15.
20.
21.
22.
23.
24.
Page 685 of 751
01-6
Compressor Assy-A/CON
Condenser Assy
Receiver Drier & Brkt Assy
Hose Assy-Discharge & Suction
Pipe Assy-Joint
Pipe Assy-Liquid No1
Pipe Assy-Liguid No2
Hose Assy-Liguid
Hose Assy-Heater Inlet
Hose Assy-Heater Outlet
Hose-Drain 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Page 700 of 751
01-216810-01
1) Components
4. A/C MODULE
Mode door actuator
PTC heater assembly
Duct temperature sensor
Air mix door actuator
Air source door actuator
A/C antibacterial filter
Blower motor 1.
2.
3.
4.
5.
6.
7.Power transistor
Thermo AMP
Mode door
Heater core
Air mix door
Evaporator
Air source door 8.
9.
10.
11.
12.
13.
14.
Page 701 of 751
01-22
2) Configuration
Air source door
caseA/C filter
Blower unit
(upper) case
Blower motor
assembly
Power
Transistor
A/C cable
assembly
Thermo AMP
Heater unit (right)
case
Air mix door
actuator
Lower duct
Mode door
link assembly Mode door
actuator Heater unit (left) case Mode doorHeater core Duct temperature
sensorEvaporatorBlower unit
(lower) case Air source door
actuator