Acura RSX Honda Integra. Manual — part 401
21-11
System Description
EVAPORATOR
EXPANSION VALVE
RECEIVER/DRYER
A/C COMPRESSOR
A/C CONDENSER
A/C PRESSURE SWITCH
BLOWER FAN
EVAPORATOR
A/C COMPRESSOR RELIEF VALVE
HIGH PRESSURE VAPOR
HIGH PRESSURE LIQUID
LOW PRESSURE LIQUID
LOW PRESSURE VAPOR
EVAPORATOR TEMPERATURE
SENSOR
THERMAL PROTECTOR
The air conditioning system removes heat from the passenger compartment by circulating refrigerant through the
system as shown below.
This vehicle uses HFC-134a (R-134a) refrigerant which does not contain chlorofluorocarbons. Pay attention to the
following service items:
• Do not mix refrigerants CFC-12 (R-12) and HFC-134a (R-134a). They are not compatible.
• Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (KEIHIN SP-10) designed for the R-134a A/C
compressor. Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in A/C
compressor failure.
• All A/C system parts (A/C compressor, discharge line, suction line, evaporator, A/C condenser, receiver/dryer,
expansion valve, O-rings for joints) are designed for refrigerant R-134a. Do not exchange with R-12 parts.
• Use a halogen gas leak detector designed for refrigerant R-134a.
• R-12 and R-134a refrigerant servicing equipment are not interchangeable. Use only a recovery/recycling/charging
station that is U.L.-listed and is certified to meet the requirements of SAE J2210 to service the R-134a air
conditioning systems.
• Always recover the refrigerant R-134a with an approved recovery/recycling/charging station before disconnecting
any A/C fitting.
(cont’d)
(Meters the required
amount of refrigerant
into the evaporator)
(Traps debris, and
removes moisture)
(Suction and compression)
(Radiation of heat)
When the refrigerant is below
196 kPa (2.0 kgf/cm , 28 psi)
or above 3,140 kPa (32 kgf/cm ,
455 psi), the A/C pressure
switch opens the circuit to
the A/C switch and stops the
air conditioning to protect the
A/C compressor.
(Absorption of heat)
(Relieves pressure at the A/C compressor
when the pressure is too high)
(Opens the A/C compressor clutch circuit
when the A/C compressor temperature
becomes too high)
2
2
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Climate Control Unit Inputs and Outputs
Cavity
Wire color
Signal
21-12
Climate Control
System Description (cont’d)
CLIMATE CONTROL UNIT 30P CONNECTOR
1
BLK
GROUND (G402)
OUTPUT
2
LT GRN
SENSOR COMMON GROUND
OUTPUT
3
4
GRY
AIR MIX POTENTIAL
5 V
OUTPUT
5
BRN
EVAPORATOR TEMPERATURE SENSOR
INPUT
6
ORN
SUNLIGHT SENSOR
INPUT
7
PNK
OUTSIDE AIR TEMPERATURE SENSOR
INPUT
8
LT BLU
IN-CAR TEMPERATURE SENSOR
INPUT
9
PNK/BLK
AIR MIX POTENTIAL
INPUT
10
11
YEL/GRN
MODE 5
INPUT
12
WHT/BLU
MODE 3, 6
INPUT
13
RED/BLU
MODE 2
INPUT
14
RED/YEL
MODE 1, 4
INPUT
15
BLK/YEL
IG2 (Power)
INPUT
16
BLU/RED
BLOWER FEEDBACK
INPUT
17
BLU/YEL
POWER TRANSISTOR CONTROL
OUTPUT
18
RED/WHT
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
OUTPUT
19
20
GRN
AIR MIX COOL
OUTPUT
21
PNK/BLU
AIR MIX HOT
OUTPUT
22
YEL/RED
MODE DEF
OUTPUT
23
YEL/BLU
MODE VENT
OUTPUT
24
BLU
A/C PRESSURE SWITCH
OUTPUT
25
GRN/WHT
FRESH
OUTPUT
26
GRN/YEL
RECIRCULATE
OUTPUT
27
YEL/BLK
REAR WINDOW DEFOGGER RELAY
OUTPUT
28
RED
DASH LIGHTS BRIGHTNESS CONTROLLER
(In the gauge assembly)
OUTPUT
29
30
RED/BLK
No.2 (15 A)
No.2 (10 A)
FUSE (In the under-hood
fuse/relay box)
INPUT
: ’05-06 models
Wire side of female terminals
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21-13
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21-14
Climate Control
Circuit Diagram
BLK
1
G302
G302
No. 20 (40 A) *
BLK/YEL
No. 19 (100 A)
5 V
ECT
SG2
GRN/YEL
B8
RED/WHT
G301
BLK
BLU/WHT
No. 12 (40 A)
3
2
1
4
YEL
SEFMJ
12 V
1
ACC
No. 14 (10 A)
BLK/RED
FANC
BLK/YEL
BLU/WHT
ECM/PCM
No. 1 (30 A)
No. 4 (20 A)
GRN
GRN/WHT
1
2
1
2
BLK
GRN/WHT
2
3
3
2
2
1
3
2
4
1
BLU/RED
RED
BLK
BLU/BLK
1
4
4
1
BLU/YEL
UNDER-HOOD FUSE/RELAY BOX
BAT
IG2
WHT
No. 20 (50 A) *
BATTERY
IGNITION SWITCH
IG2 HOT in ON (II)
UNDER-DASH
FUSE/RELAY BOX
RADIATOR
FAN
RELAY
A/C
CONDENSER
FAN
RELAY
A/C
COMPRESSOR
CLUTCH
RELAY
BLOWER
MOTOR
RELAY
THERMAL
PROTECTOR
A/C
COMPRESSOR
CLUTCH
MULTIPLEX
CONTROL UNIT
(In the under-dash
fuse/relay box)
A/C PRESSURE
SWITCH
ENGINE
COOLANT
TEMPERATURE
(ECT) SENSOR
A/C
CONDENSER
FAN
MOTOR
RADIATOR
FAN
SWITCH
(Closed: Above
199 °F (93 °C) )
RADIATOR
FAN
MOTOR
FANC
GRN/WHT
BLU
1
2
SEFMJ
YEL
12 V
YEL
SG2
GRN/YEL
RED/WHT
*3
*4
*3
*4
*3
*4
1
2
1
2
E10
B6
E18
F9
E12
E24
E13
A10
A23
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