2006 ACURA CSX climate control

21-98Climate Control
A/C System Noise Check (cont’d)
5. Turn the ignition switch to LOCK (0), and check the
drive belt for excessive wear, oil contamination,
improper routing, or a faulty belt tensioner
(see page 4-30). Correct any problems found. Start
the engine, run the A/C system, and check if the
noise is coming from the drive belt, the belt
tensioner or any of the pulleys. Repair or replace
any faulty components.
6. Listen for noises coming from the A/C lines, the A/C hoses, the condenser, the evaporator, the receiver/
drier, or the expansion valve, and check these
items:
 Noises caused by A/C components touching other components or the body. Reroute or
insulate the A/C component(s) as needed, and
recheck for noise.
 Loose, damaged or excessively worn A/C components or mounting hardware. Repair or
replace the faulty component(s) or hardware, and
recheck for noise.
 A moaning noise coming from the A/C suction line. If there is a moaning noise, check the
system refrigerant charge (see page 21-92). If the
refrigerant charge is OK, replace the receiver/
dryer.
7. Check the operation of the A/C compressor clutch:  Make sure compressor clutch engages withoutslipping. If the clutch does not engage,
troubleshoot the A/C compressor clutch circuit
(see page 21-62). If the compressor clutch slips,
replace the complete clutch assembly (see page
21-86).
 Make sure the compressor clutch disengages. If the clutch does not disengage, do the A/C
compressor clutch check (see page 21-85). If the
compressor clutch is OK, replace the A/C
compressor (see page 21-83).
 Make sure the compressor clutch cycles normally. If the compressor clutch is cycling rapidly, the
A/C system is probably low on refrigerant due to
a leak. Do the refrigerant leak check (see page
21-93). If the refrigerant charge is OK, and there
are no leaks, troubleshoot the A/C compressor
clutch circuit. 8. Listen with a stethoscope for noises coming from
the A/C compressor, and check these items:
 The noise changes when the compressor clutch disengages. If the noise does not change when
the A/C compressor disengages, the noise may
be caused by an engine-related component.
Probe the engine area with a stethoscope to
pinpoint the noise.
 The A/C system operating pressures are normal. If the system pressures are abnormal,
troubleshoot the problem using the pressure test
table in the A/C system check (see page 21-99).
Correct the pressure-related problem(s), and
recheck for noise.
 The compressor hose connections, mounting brackets, and fasteners are in good condition. If
any of these components are loose, damaged, or
excessively worn, repair or replace the faulty
component(s), and recheck for noise. If these
components are in good condition, and the noise
is still present, replace the A/C compressor
(see page 21-83).
08/08/21 14:44:54 61SNR030_210_0099
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DYNOMITE -2009-

Î
21-100Climate Control
A/C System Test (cont’d)
80 %
HUMIDITY
LEVEL
°C
(°F)
49
(120)
°C
(°F)
33
(92)
25
(77)
14
(57)
VENT
(DELIVERY)
TEMPERATURE
35
(95)
Ambient (Intake) Temperature vs. Vent (Delivery) Temperature
AMBIENT (INTAKE) TEMPERATURE 30 %
28
(32)
17
(62)
8
(47) 31
(87)
22
(72) 19
(67)
11
(52)
6
(42)
3
(37)
0
(32) 46
(115)
43
(110)
41
(105)
38
(100)
32
(90)
29
(85)
27
(80)
24
(75)
21
(70)
18
(65)
16
(60)
10. To complete the vent (delivery)/ambient air (intake) temperature chart:
 Mark the vent (delivery) temperature on the vertical line.
 Mark the ambient air (intake) temperature on the bottom line.
 Draw a vertical line from the ambient air (intake) temperature mark.
 Draw a horizontal line from the vent (delivery) temperature mark unit it intersects the vertical line.NOTE: The low side and intake temperatures should intersect in the shaded area within about 10 % of the
measured humidity level. Any measurements outside the line may indicate the need for further inspection.
08/08/21 14:44:55 61SNR030_210_0101
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DYNOMITE -2009-

Î
21-102Climate Control
A/C System Test (cont’d)
80 %
HUMIDITY
LEVEL
°C
(°F)
49
(120)
psi
(kPa)
60
(414)
45
(310)
25
(172)
LOW SIDE
(SUCTION)
PRESSURE
35
(95)
Ambient (Intake) Temperature vs. Low Side (Suction) Pressure
AMBIENT (INTAKE) TEMPERATURE 30 %
50
(345)
30
(207)
15
(103) 55
(379)
40
(276) 35
(241)
20
(138)
10
(69) 5
(34)0 46
(115)
43
(110)
41
(105)
38
(100)
32
(90)
29
(85)
27
(80)
24
(75)
21
(70)
18
(65)
16
(60)
12. To complete the low side (suction pressure)/ambient air (intake) temperature chart:
 Mark the low side (suction pressure) temperature along the vertical line.
 Mark the ambient air (intake) temperature along the bottom line.
 Draw a vertical line from the ambient air (intake) temperature mark.
 Draw a horizontal line from the vent (delivery) temperature mark unit it intersects the vertical line.NOTE: The low side and intake temperatures should intersect in the shaded area within about 10 % of the
measured humidity level. Any measurements outside the line may indicate the need for further inspection.
08/08/21 14:44:56 61SNR030_210_0103
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DYNOMITE -2009-

Test results Related symptoms Probable causeRemedy
21-104Climate Control
A/C System Test (cont’d)














Suction and
discharge pressures
are abnormally high,
and refrigerant line
temperatures are
abnormal
The high pressure
vapor line to the
condenser is too hot.
The low pressure liquid
line from the
expansion valve is not
cold.
There is an abrupt
temperature drop
along a refrigerant line,
or in the condenser or
evaporator.The A/C system
refrigerant flow is
restricted.
Replace the restricted line or
component.
Suction and
discharge pressures
are abnormally high,
but drop rapidly
when the
compressor
disengages After stopping the A/C
compressor, the
discharge pressure
quickly drops about
196 kPa (28 psi), then
falls gradually.
The input and output
temperatures at the
expansion valve are
not similar.There is excess air in
the A/C system.
Recover refrigerant (see page 21-90),
evacuate the system (see page 21-91),
and recharge the system (see page
21-92).
Suction and
discharge pressures
are abnormally high,
and there is little or
no airflow through
the A/C condenser The condenser
and/or radiator fins
are clogged.
The condenser fins
are damaged.
The condenser
and/or radiator
fans are not
working properly.Clean debris from the condenser
and/or radiator fins.
Comb the condenser fins to repair
any damage.
Troubleshoot the A/C condenser fan
and/or the radiator fan circuit(s).
The suction pressure
is high and the
discharge pressure is
low. Both pressures
are steady The liquid line
temperature is similar
on both sides of
expansion valve.
System pressures do
not vary at a steady
engine speed.The expansion valve
is stuck open.
Replace the expansion valve (see page
21-80).
The suction pressure
is low, the discharge
pressure is high, and
the refrigerant
temperature changes
abnormally
somewhere in the
system The high pressure
liquid line going into
the expansion valve is
cold.
There is an abrupt
temperature drop in
the line between the
compressor and the
condenser, or in the
line between the
condenser and the
expansion valve.The A/C system
refrigerant flow is
restricted.
Replace the restricted line or
component.
08/08/21 14:44:56 61SNR030_210_0105
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DYNOMITE -2009-

Test results Related symptoms Probable causeRemedy
21-106Climate Control
A/C System Test (cont’d)


The discharge
pressure is low, the
suction pressure is
extremely low, and
the expansion valve
outlet is abnormally
warm
There is no frost on the
expansion valve outlet,
and the liquid line
temperature changes
significantly across the
expansion valve.
There is excessive
moisture in the A/C
system.
Recover refrigerant (see page 21-90),
then replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the suction line is
abnormally cold There is frost on the line
from the evaporator to
the compressor.
The evaporator is
internally
contaminated or
plugged.Recover refrigerant (see page 21-90),
then replace the evaporator. Evacuate
the system (see page 21-91), and
recharge the system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the refrigerant
temperature doesn’t
change going
through the
expansion valve There is no frost on the
expansion valve, and
the low pressure liquid
line is not cold.
The liquid line
temperatures are
similar on both sides of
expansion valve.
The expansion valve
is faulty.
Replace the expansion valve (see page
21-80).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the expansion valve
is abnormally cold There is frost on the
expansion valve.
Excessive moisture
in the system is
freezing the
expansion valve.Recover refrigerant (see page 21-90),
the replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the high pressure
liquid line is
abnormally cold There is frost on the line
from the receiver/dryer to
the expansion valve.
The receiver/dryer is
clogged.
Recover refrigerant (see page 21-90),
then replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
08/08/21 14:44:57 61SNR030_210_0107
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DYNOMITE -2009-

Î
22-9
SRS UNIT
CLIMATE CONTROL UNIT
IMMOBILIZER-KEYLESS
CONTROL UNIT
(With built-in receiver)
EPS CONTROL UNIT
AUDIO UNIT or
NAVIGATION UNIT
TPMS CONTROL UNIT
(’08-09 models)
08/08/21 14:22:06 61SNR030_220_0011
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DYNOMITE -2009-

•••
•••´
´
•••
Under-dash Fuse/Relay Box
Fuse
Number Amps
Component(s) or Circuit(s) Protected
22-62Power Distribution
Fuse to Components Index (cont’d)
1 7.5 A Power mirror switch light
2 15 A ECM/PCM, Fuel pump (via PGM-FI main relay 2), Immobilizer-keyless control unit
3 10 A Alternator, CMP sensor A, ECM/PCM (via brake pedal position switch), ELD, EVAP canister purge valve, MAF
sensor/IAT sensor, Reverse lockout solenoid , Secondary HO2S (sensor 2)
4 7.5 A ABS modulator-control unit , EPS control unit, VSA modulator-control unit , Yaw rate-lateral acceleration sensor
5 15 A Seat heaters (via seat heater relays)
6 20 A Fog light relay, Fog lights (via fog light relay)
7 Not used
8 Not used
9 7.5 A ODS unit, Passenger’s airbag cutoff indicator, SRS unit
10 7.5 A Back-up light (M/T), Gauge control module (speedo), Gauge control module (tach), MICU, Shift lock solenoid (A/T), TPMS control unit
11 10 A SRS unit
12 10 A Right headlight (high beam)
13 10 A Left headlight (high beam)
14 7.5 A Audio unit light , Climate control unit light, Dash lights brightness controller and odometer select/reset switch light, Driver’s footwell light , Driver’s seat heater switch light, Glove box light, Hazard warning switch light,
Moonroof switch light, Navigation unit , Park pin switch light (A/T), Passenger’s airbag cutoff indicator light,
Passenger’s footwell light , Passenger’s seat heater switch light, Steering wheel switches light (via cable reel),
VSA OFF switch light
15 7.5 A Parking lights, Taillights, License plate lights, Side marker lights
16 10 A Right headlight (low beam) 15 A Right HID unit
17 10 A Left headlight (low beam) 15 A Left HID unit
18 20 A MICU ( B H/L HI)
19 15 A MICU ( B SMALL LT)
20 Not used
1: ’06-07 Touring and Premium models
2: ’07 TYPE S and ’08-09 models
3: ’08-09 models
4: TYPE S model
5: With HID
6: Without HID
7: TYPE S and ’08 Premium and ’09 models
8: Without navigation system
9: With navigation system
4
1 2
2
7
3
8 49
4
6
5
6
5
08/08/21 14:24:03 61SNR030_220_0064
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DYNOMITE -2009-

´
´
•••
•••
´
•••
•••
•••

Fuse
Number Amps
Component(s) or Circuit(s) Protected
22-63
23 45
1 16 17
19
18 20
11
12 1413 15
26 27 2928 30
21 22
2423 25
36 37
38
3132
34
33
35
10
67 8
9
21 20 A MICU ( B H/L LO)
30 A MICU ( B H/L LO)
22 Not used
23 Not used
24 20 A Moonroof control unit/motor
25 20 A MICU ( B DR LOCK)
26 20 A Driver’s power window motor (via power window master switch)
27 Not used
28 15 A Console accessory power socket (via console accessory power socket relay)
29 15 A Front accessory power socket (via front accessory power socket relay)
30 20 A Front passenger’s power window motor
31 Not used
32 20 A Moonroof control unit/motor, Moonroof switch , Right rear power window motor
33 20 A Left rear power window motor
34 Not used
35 7.5 A Audio unit , Console accessory power socket relay, Front accessory power socket relay, HandsFreeLink control unit , Ignition key switch, Navigation unit , Stereo amplifier
36 10 A Climate control unit, Driver’s seat heater switch, Fan control relay and radiator fan relay (via A/C diode), Passenger’s seat heater switch, Power mirrors (via power mirror switch), Under-hood fuse/relay box (A/C
compressor clutch relay, Blower motor relay, Power mirror defogger relay, Rear window defogger relay)
37 7.5 A MICU (daytime running lights power supply)
38 30 A MICU (IG 1 WIPER)
1: ’06-07 models
2: TYPE S model
3: Without HID
4: With HID
5: ’09 model with navigation system
6: Without navigation system
7: With navigation system3
4
1
6
5 72
08/08/21 14:24:03 61SNR030_220_0065
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