ACURA CSX 2006 Service Repair Manual


(#'

 )
21-8921-89
Receiver/Dryer Desiccant
Replacement
A 6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft) A
B
C
8. Remove the A/C condenser (A) by lifting it up. Be careful not to damage the radiator and A/C
condenser fins when removing the A/C condenser.
9. Install the A/C condenser in the r everse order of
removal, and note these items:
 If you’re installing a new A/C condenser, add refrigerant oil (SP-10) (see page 21-7).
 Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before
installing them. Be sure to use the correct O-rings
for HFC-134a (R-134a) to avoid leakage.
 Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture
absorption.
 Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil
contacts the paint, wash it off immediately.
 Charge the system (see page 21-92).
 Adjust the hood latch (see page 20-152). NOTE: Install the receiver/dryer as quickly as possible
to prevent the system from absorbing moisture from
the air.
1. Remove the A/C condenser (see page 21-88).
2. Remove the bolts from the A/C condenser, then remove the receiver/dryer (A), the bracket (B), and
the O-rings (C).
3. Install the receiver/dryer in the reverse order of removal. Replace the O-rings with new ones, and
apply a thin coat of refrigerant oil (SP-10) before
installing them. Be sure to use the correct O-rings
for HFC-134a (R-134a) to avoid leakage.
08/08/21 14:43:49 61SNR030_210_0090
ProCarManuals.com
DYNOMITE -2009-


(#'

 )
21-8921-89
Receiver/Dryer Desiccant
Replacement
A 6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)
6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft) A
B
C
8. Remove the A/C condenser (A) by lifting it up. Be careful not to damage the radiator and A/C
condenser fins when removing the A/C condenser.
9. Install the A/C condenser in the r everse order of
removal, and note these items:
 If you’re installing a new A/C condenser, add refrigerant oil (SP-10) (see page 21-7).
 Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before
installing them. Be sure to use the correct O-rings
for HFC-134a (R-134a) to avoid leakage.
 Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture
absorption.
 Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil
contacts the paint, wash it off immediately.
 Charge the system (see page 21-92).
 Adjust the hood latch (see page 20-152). NOTE: Install the receiver/dryer as quickly as possible
to prevent the system from absorbing moisture from
the air.
1. Remove the A/C condenser (see page 21-88).
2. Remove the bolts from the A/C condenser, then remove the receiver/dryer (A), the bracket (B), and
the O-rings (C).
3. Install the receiver/dryer in the reverse order of removal. Replace the O-rings with new ones, and
apply a thin coat of refrigerant oil (SP-10) before
installing them. Be sure to use the correct O-rings
for HFC-134a (R-134a) to avoid leakage.
08/08/21 14:43:49 61SNR030_210_0090
ProCarManuals.com
DYNOMITE -2009-


(#'


 )

21-90Climate Control
Refrigerant Recovery
A
C B
 Air conditioning refrigerant or lubricant vaporcan irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
1. Connect an R-134a refrigerant recovery/recycling/ charging station (A) to the high-pressure service
port (B) and the low-pressure service port (C), as
shown, following the equipment manufacturer’s
instructions. 2. Measure the amount of refrigerant oil removed
from the A/C system after the recovery process is
completed. Be sure to put the same amount of new
refrigerant oil back into the A/C system before
charging.
08/08/21 14:44:52 61SNR030_210_0091
ProCarManuals.com
DYNOMITE -2009-

µ
µ Î
(#'


 )

21-91
System Evacuation
A
C B
 Air conditioning refrigerant or lubricant vaporcan irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
 Do not allow moisture to contaminate the A/C system oil. Moisture in the oil is difficult to remove, and it can
damage the A/C compressor.
1. When an A/C System has been opened to the atmosphere, such as during installation or repair, it
must be evacuated using an R-134a refrigerant
recovery/recycling/charging station. If the system
has been open for several days, the receiver/dryer
should be replaced, recover the refrigerant, if any,
from the A/C system (see page 21-90). And the
system should be evacuated for several hours.2. Connect an R-134a refrigerant recovery/recycling/
charging station (A) to the high-pressure service
port (B) and the low-pressure service port (C), as
shown, following the equipment manufacturer’s
instructions. Recover the refrigerant, if any, from
the A/C system (see page 21-90).
3. Evacuate the system. The vacuum pump should run for a minimum of 45 minutes to eliminate all
moisture from the system. When the suction gauge
reads 93.3 kPa (700 mmHg, 27.6 in.Hg) for at least
45 minutes, close all valves, and turn off the
vacuum pump.
4. If the suction gauge does not reach approximately 93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes,
there is probably a leak in the system. Partially
charge the system, and check for leaks (see page
21-93).
08/08/21 14:44:53 61SNR030_210_0092
ProCarManuals.com
DYNOMITE -2009-

µ
Î
(#'


 )Refrigerant Capacity:
400 to 450 g
0.40 to 0.45 kg
0.9 to 1.0 lbs
14.1 to 15.9 oz
21-92
Climate Control
System Charging
A
C B
 Air conditioning refrigerant or lubricant vaporcan irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
1. Connect an R-134a refrigerant recovery/recycling/ charging station (A) to the high-pressure service
port (B) and the low-pressure service port (C), as
shown, following the equipment manufacturer’s
instructions. 2. Recover the refrigerant in the A/C system (see page
21-90).
3. Evacuate the system (see page 21-91). If the system cannot reach a vacuum of 93.3 kPa (700 mmHg,
27.6 in.Hg) in 15 minutes, or cannot hold a vacuum
for at least 15 minutes, there is probably a leak. Do
the Refrigerant Leak Check (see page 21-93), and
repair any leaks before charging the system.
4. Add the same amount of new refrigerant oil to the system that was removed during recovery. Use
only SP-10 refrigerant oil.
5. Charge the system with the specified amount of R-134a refrigerant. Do not overcharge the system;
the A/C compressor will be damaged.
Select the appropriate units of measure for your
refrigerant charging station.
6. Check for refrigerant leaks (see page 21-93).
7. Check the system performance (see page 21-99).
08/08/21 14:44:53 61SNR030_210_0093
ProCarManuals.com
DYNOMITE -2009-

(#'


")
Special Tools Required
Leak Detector Usage Tips (Refer to the
Operator’s Manual for complete operating
instructions)
21-93
Refrigerant Leak Check
 Leak detector YGK-H-10PM
 Leak detector HLD-100
 Leak detector TIFZX-1, or commercially available
 OPTIMAX Jr. A/C Leak Detection Kit (TRP124893)
These tools are available through the Honda Tool and
Equipment Program; call
888-424-6857
 Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
 Check the system for leaks using an R-134a refrigerant leak detector with an accuracy of 14 g
(0.5 oz) per year or better.  Position the vehicle in a wind-free work area. This will
aid in detecting small leaks.
 When using the leak detector for the first time, allow it to warm up for 2 minutes with the probe in a clean
atmosphere. This lets the temperature sensor in the
detector stabilize.
 The calibration check should be done in the ‘‘Search 2’’ mode. Once that is done, the other check
modes do not need calibrating.
 When leak checking through the HVAC module drain hose, avoid drawing water into the probe. Water can
damage the internal pump and sensor.
 Avoid creasing the flexible probe extension. Creases can restrict air flow and give false readings.
 Because the detector recalibrates itself for ambient gases, it may be necessary to move the detector
away from the leak to clear the sensor. Once the
sensor has cleared, recheck the suspected leak.
 When removing the clear probe tip, be careful not to lose the flow ball.
 R-134a is heavier than air; always check below and to the sides of all potential leak sources.
 Halogen leak detectors are sensitive to chemicals: windshield washing solutions, solvents/cleaners, and
some vehicle adhesives. Keep these chemicals out of
the area when doing leak detection.
(cont’d)
08/08/21 14:44:53 61SNR030_210_0094
ProCarManuals.com
DYNOMITE -2009-

Î
Fluorescent Dye Usage Tips
Refrigerant Capacity:
400 to 450 g
0.40 to 0.45 kg
0.9 to 1.0 lbs
14.1 to 15.9 oz
21-94Climate Control
Refrigerant Leak Check (cont’d)
A
C B
 Use only Tracer-Stick single dose fluorescent dyecapsules from Tracerline
. Other dyes contain
solvents that may contaminate the refrigerant oil,
leading to component failure.
 Adding excessive amounts of dye can damage the compressor.
 PAG oil is water soluble, so condensation on the evaporator core or the refrigerant lines may wash the
PAG oil and fluorescent dye away from the actual
leak. Condensation may also carry dye through the
evaporator module drain.
 After checking and repairing leaks, thoroughly clean any residual dye from the areas where leaks were
found. Use GLO-AWAY dye cleaner, from Tracerline
,
and hot water to remove the dye (follow the
instructions on the bottle). Residual dye stains can
cause misdiagnosis of any future A/C system leaks.
 If any refrigerant dye contacts an exterior paint surface, remove it by doing this:
– Carefully wash the affected surfaces to remove any dirt, and to prevent paint scratching.
– Mix water and isopropyl alcohol in a 50/50 mixture.
– Soak a soft 100 percent cotton towel with the water/ alcohol mixture, and place the cloth on the affected
areas to remove the dye.
– After removing the dye with the water/alcohol- soaked cloth, carefully wash the affected areas, and
check that there is no remaining dye. 1. Connect an R-134a refrigerant recovery/recycling/
charging station (A) to the high-pressure service
port (B) and the low-pressure service port (C), as
shown, following the equipment manufacturer’s
instructions.
2. Recover refrigerant from the A/C system (see page 21-90), and evacuate the system (see page 21-91). If
the system achieves a vacuum of approximately
93.3 kPa (700 mmHg, 27.6 in.Hg) in 15 minutes, and
holds the vacuum for 15 minutes, then the system
does not have a leak at this time. If the system
cannot achieve or hold a vacuum, continue the
refrigerant leak check.
3. Open the high pressure valve to charge the system to the specified capacity.
Select the appropriate units of measure for your
refrigerant charging station.
08/08/21 14:44:54 61SNR030_210_0095
ProCarManuals.com
DYNOMITE -2009-

Possible Leak Area Diagnostic Procedure with theLeak Detector Notes
21-95
4. With the engine OFF, use a halogen leak detector first to detect the leak source. Follow a continuous path in order
to ensure that you will not miss any possible leaks. Test the following areas of the system for leaks:

 





 


Service Ports Check the service ports with
the detector.
If the detector ‘‘sniffs’’ a leak,
use fluorescent dye to
confirm it. When capping the service ports, ensure that the seals
on the port caps are in place, and that the caps are
tight. The caps are used as the final seals in the
system.
Condenser If the detector ‘‘sniffs’’ a leak, use fluorescent dye to confirm it. Check for joints or connections coated with oily
dust.
Check for damaged and corroded areas.
Check all fittings, couplings, brazed/welded areas
and areas around attachment points.
Move the probe slowly (1 inch/second or less), and
keep it within 1/4 inch of the component being
checked. This maximizes the chance of detecting a
leak.
If you detect a leak, blow compressed air over the
area, then recheck for leaks. For large leaks,
clearing the area with compressed air may help
you pinpoint the leak source.
A/C Lines (Low
pressure side) Wiggle the rubber hoses
when checking crimped metal
ends.
If the detector ‘‘sniffs’’ a leak,
use fluorescent dye to
confirm it. Check all fittings, couplings, pressure switches,
brazed/welded areas, and areas around attachment
points on A/C lines and components.
Check for damaged and corroded areas.
Move the probe slowly (1 inch/second or less), and
keep it within 1/4 inch of the component being
checked. This maximizes the chance of detecting a
leak.
5. Close the quick coupler valves, then disconnect the quick couplers from the vehicle service ports.
6. Attach the universal connect set, from the Optimax Jr. Leak Detection Kit, to the service valve fitting. Close the control valve (the black knob on the connect set).
7. Attach the charging station low pressure hose quick coupler to the service valve fitting, and open the quick coupler valve. Evacuate the connect set using the charging station vacuum pump, then close the quick coupler
valve.
8. Detach the universal connect set, and install a Tracer-Stick
dye capsule between the connect set and the service
valve fitting (see the manufacturer’s instructions for more detail).
9. Attach the quick coupler on the universal connect set to the low pressure service port on the vehicle. Open the charging station low pressure hose quick coupler valve, but do not open the control valve.
10. Start the engine, and set the A/C system to MAX A/C. Open the control valve to let refrigerant and the dye enter the A/C system through the low pressure service port. Close the control valve when the Tracer-Stick
dye capsule
is empty.
11. Run the engine and A/C system for 15 minutes to thoroughly circulate the dye. Then shut the engine off, and inspect the following areas of the system for leaks.
(cont’d)
08/08/21 14:44:54 61SNR030_210_0096
ProCarManuals.com
DYNOMITE -2009-

Possible Leak AreaDiagnostic Procedure with Fluorescent Dye
21-96Climate Control
Refrigerant Leak Check (cont’d)
NOTE:
 Check for leaks in a dark work area, and use the UV light and the special glasses from the leak check kit. Other UV lights may not work well with the Tracer-Stick
dye.
 Small leaks may take up to 1 week of vehicle operation (with normal A/C use) to become visible.

















Service Ports If a leak is found, replace the Schrader valve on the service port.
A/C Lines Use a permanent marker pen to circle the leak area.
If a leak is found, remove and replace the A/C line (see page 21-8).
Condenser If a leak is found, remove the condenser (see page 21-88). Determine whether leak is in the condenser or the receiver/dryer.
Use a permanent marker pen to circle the leak area.
Replace either the receiver/dryer (see page 21-89), or the condenser
(see page 21-88), depending upon which is leaking.
A/C Compressor Check for leaks at all of the compressor joints, the clutch center, the compressor front housing bolts, and the scroll bolts on the back of the
compressor.
If a leak is found, use a permanent marker pen to circle the leak area.
If the compressor relief valve appears to be leaking, determine whether the
leak is coming from the relief valve, or the joint between the compressor
casing and the valve.
If the leak is from the relief valve, check the A/C system pressures, and refer
to the pressure test table in the A/C system test (see page 21-99). If the leak is
from the casing/valve joint, replace the A/C compressor relief valve (see page
21-87).
If the leak is coming from the suction hose and/or discharge hose fittings on
the compressor, clean the A/C fittings and replace the suction/discharge
fitting O-rings.
For all other compressor leaks, remove and replace the A/C compressor
(see page 21-83).
Evaporator Start checking for evaporator leaks by illuminating the evaporator drain tube area.
If a leak is found, remove theevaporator core (see page 21-78).
Determine whether leak is from evaporator or expansion valve.
Use a permanent marker pen to circle the leak area.
Replace the expansion valve (see page 21-80), or the evaporator core
(see page 21-78), depending upon which is leaking.
08/08/21 14:44:54 61SNR030_210_0097
ProCarManuals.com
DYNOMITE -2009-

(#'

")
21-97
A/C System Noise Check
 Air conditioning refrigerant or lubricant vaporcan irritate your eyes, nose, or throat.
 Be careful when connecting service equipment.
 Do not breathe refrigerant or vapor.
The A/C system noise check will help you determine the
source of abnormal A/C system noise.
NOTE:  If accidental system discharge occurs, ventilate the work area before resuming service.
 Additional health and safety information may be obtained from the refrigerant and lubricant
manufacturers.
 Identify the conditions when the noise occurs. The weather, the vehicle speed, the vehicle being in gear
or in neutral, the engine temperature, or other
conditions may be factors in determining the noise
source.
 Do an A/C system inspection (see page 21-6), and correct any problems found prior to diagnosing
abnormal noises.
 Abnormal A/C noises can be misleading. For example,
a sound similar to a failed bearing may be caused by
loose fasteners, loose mounting brackets, or faulty
compressor clutch assembly.
1. Inspect the air inlet grille in the cowl cover for debris. If debris is present, remove it.
2. Sit inside the vehicle, close the doors and windows, and turn the ignition switch to ON (II), but do not
start the engine. Cycle the HVAC system through all
blower speeds and all air distribution modes to
determine where and when the noise occurs. 3. Operate the blower at each speed with the engine
and A/C off, and check for unusual noises and
excessive vibration. If noise and/or vibration are
present, do the following checks:
–1 If the noise or vibration occurs only in a specific mode or setting, then check these
items: Operation of the mode control motor, door, and linkage
 Operation of the air mix control motor(s), door(s), and linkage
 Operation of the recirculation motor, door, and linkage
–2 If there is a squeaking or chirping noise, but no unusual vibration, replace the blower motor
(see page 21-77).
–3 Remove the blower unit (see page 21-76), and check for foreign material (leaves or twigs, for
example) on the blower motor and fan. If
foreign material is present, remove it, and
recheck for noise. If you don’t find any foreign
material, remove the blower motor (see page
21-77), and check these items: Check if the fan blades are cracked or broken
 Make sure the fan retainer is tight
 Inspect the fan alignment on the blower motor shaft
Replace the blower motor if any problems are
present.
4. Set up the vehicle for the running A/C che cks:
 Select a quiet area for testing
 Apply the parking brake
 Shift the vehicle in PARK or in Neutral
 Start the engine
 Set the temperature control dial to Max Cool
 Set the mode control switch to Vent
 Set the fan control dial to minimum (but not OFF)
 Turn the A/C switch ON
Switch the compressor on and off several times to
clearly identify the sound during A/C compressor
operation. Listen to the noise while the A/C
compressor clutch is engaged and disengaged.
Probe the A/C system with a stethoscope to
pinpoint the noise.
NOTE: If the noise does not change when the A/C
compressor clutch engages or disengages, the
noise may be caused by an engine-related
component. Probe the engine area with a
stethoscope to pinpoint the noise. (cont’d)
08/08/21 14:44:54 61SNR030_210_0098
ProCarManuals.com
DYNOMITE -2009-