2006 ACURA CSX climate control




21-82Climate Control
Heater Unit/Core Replacement (cont’d)
A
A
B B
C D
A
6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)A
9. Disconnect the connector (A) from the recirculation
control motor.
10. Disconnect the connectors (A) from the mode control motor, the evaporator temperature sensor,
and the power transistor. Remove the wire harness
clip (B). 11. Disconnect the connectors (A) from the air mix
control motor and A/C wire harness. Remove the
connector clip (B), the wire harness clips (C), and
the wire harness (D).
12. Remove the mounting bolt, mounting nuts, and blower-heater unit (A).
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21-84Climate Control
A/C Compressor Replacement (cont’d)
8x1.25mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)
A
7. Remove the mounting bolts and the A/C
compressor (A). Be careful not to damage the
radiator fins when removing the A/C compressor. 8. Install the compressor in the reverse order of
removal, and note these items:
 Inspect the A/C lines for any signs of contamination.
 If you’re installing a new A/C compressor, you must calculate the amount of refrigerant oil to be
removed from it (see page 21-7). A new A/C
compressor comes with a full charge of oil.
 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.
 Use refrigerant oil (SP-10) for HFC-134a SANDEN spiral type A/C compressor only.
 To avoid contamination, do not return the oil to the container once dispensed, and never mix it
with other refrigerant oils.
 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).
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Special Tools Required
21-86
Climate Control
A/C Compressor Clutch Overhaul
25.5 N·m
(2.6 kgf·m, 18.8 lbf·ft)
A
B A
B
A
B A
B
C
D 1.3 N·m
(0.1 kgf·m, 1.0 lbf·ft)
A/C clutch holder, Robinair 10204 or Kent-Moore
J37872, or Honda Tool and Equipment KMT- J33939,
commercially available
1. Remove the center nut while holding the armature plate (A) with a commercially available A/C clutch
holder (B).
2. Remove the armature plate (A) and shim(s) (B), taking care not to lose the shim(s). If the clutch
needs adjustment, increase or decrease the
number and thickness of shims as necessary, then
reinstall the armature plate, and recheck its
clearance (see page 21-85).
NOTE: The shims are available in four thicknesses:
0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm. 3. If you are replacing the field coil, remove the snap
ring (A) with snap ring pliers, then remove the rotor
pulley (B). Be careful not to damage the rotor pulley
and A/C compressor.
4. Remove the bolt and holder (A), then disconnect the field coil connector (B). Remove the snap ring
(C)withsnapringpliers,thenremovethefieldcoil
(D). Be careful not to damage the field coil and A/C
compressor.
5. Reassemble the clutch in the reverse order of disassembly, and note these items:
 Install the field coil with the wire side facing down, and align the boss on the field coil with the
hole in the A/C compressor.
 Clean the rotor pulley and A/C compressor sliding surfaces with contact cleaner or other
non-petroleum solvent.
 Install new snap rings, note the installation direction, and make sure they are fully seated in
the groove.
 Make sure that the rotor pulley turns smoothly after it’s reassembled.
 Route and clamp the wires properly or they can be damaged by the rotor pulley.
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21-88 Climate Control
A/C Condenser Replacement
6x1.0mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
A
6x1.0mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft) A 6x1.0mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)
A
A
B CD
1. Recover the refrigerant with a recovery/recycling/
charging station (see page 21-90).
2. Remove the front grille:  ’06-08 models (see page 20-160)
 ’09 model (see page 20-161)
3. Remove the bolts, then disconnect the discharge hose (A) from the A/C condenser.
4. Remove the bolt, then disconnect the receiver line (A) from the A/C condenser. 5. Remove the bolts and the A/C condenser upper
mount brackets (A).
6. Lift the tab (A) to release the lock, then remove the outside air temperature sensor (B) from the bracket.
Disconnect the 2P connector (C), then remove the
clip (D).
7. Remove the hood latch (see page 20-181).
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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.
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 )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).
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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.
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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.
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