ACURA CSX 2006 Service Repair Manual


(#'


 )
21-80Climate Control
Expansion Valve Replacement
A
5x0.8mm
3.2 N·m
(0.33 kgf·m,
2.4 lbf·ft)
B
1. Remove the evaporator core (see page 21-78).
2. Remove the bolts (A) and expansion valve (B).
3. Install the expansion valve in the reverse order of
removal and note these items:
 If you’re installing a new expansion valve, 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.
 Make sure that there is no air leakage.
 Charge the system (see page 21-92).
08/08/21 14:43:42 61SNR030_210_0081
ProCarManuals.com
DYNOMITE -2009-




(#'


 )
21-81
Heater Unit/Core Replacement
A
B C
8x1.25mm
12.3 N·m
(1.3 kgf·m, 9.0 lbf·ft)
B A
SRS components are located in this area. Review the
SRS component locations (see page 24-11) and the
precautions and procedures (see page 24-13) before
doing repairs or service.
1. Do the battery terminal disconnection procedure (see page 22-68).
2. Disconnect the A/C line from the evaporator core
(see page 21-78).
3. Remove the air cleaner housing assembly (see page 11-345).
4. When the engine is cool, drain the engine coolant from the radiator (see page 10-8).
5. From under the hood, slide the hose clamps (A) back. Disconnect the inlet heater hose (B) and the
outlet heater hose (C) from the heater unit. Note the
orientation of the hoses.
Engine coolant will run out when the hoses are
disconnected; drain it into a clean drip pan. Be sure
not to let coolant spill on the electrical parts or the
painted surfaces. If any coolant spills, rinse it off
immediately. 6. Remove the mounting nut from the heater unit.
Take care not to damage or bend the fuel lines or
brake lines, etc.
7. Remove the dashboard (see page 20- 108).
8. Disconnect the connector (A) from the blower motor. Remove the wire harness clip (B).
(cont’d)
08/08/21 14:43:43 61SNR030_210_0082
ProCarManuals.com
DYNOMITE -2009-




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).
08/08/21 14:43:44 61SNR030_210_0083
ProCarManuals.com
DYNOMITE -2009-


(#'



 )
21-8321-83
A/C Compressor Replacement
A C
B
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
A
B
13. Remove the self-tapping screws, the heater core cover (A), the grommet (B). and carefully pull out
the heater core (C).
14. Install the heater core and the evaporator core in the reverse order of removal.
15. Install the heater unit in the reverse order of removal, and note these items:
 Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely.
 Refill the cooling system with engine coolant (see page 10-8).
 Make sure that there is no coolant leakage.
 Make sure that there is no air leakage.
 Refer to evaporator core replacement (see page 21-78).
16. Do the battery terminal reconnection procedure (see page 22-68). NOTE: Do not install an A/C compressor into a system
unless you are completely sure that the system is free
of contamination. Installing the A/C compressor into a
contaminated system can result in premature A/C
compressor failure.
1. If the A/C compressor is marginally operable, run the engine at idle speed, and let the air
conditioning work for a few minutes, then shut the
engine off.
2. Recover the refrigerant with a recovery/recycling/ charging station (see page 21-90).
3. Remove the drive belt (see page 4-31).
4. Remove the front bulkhead and the condenser fan shroud (see page 10-19).
5. Remove the splash shield (see page 20-172).
6. Remove the bolt and the nut, then disconnect the suction hose (A) and discharge hose (B) from the
A/C compressor. Plug or cap the lines immediately
after disconnecting them to avoid moisture and
dust contamination.
(cont’d)
08/08/21 14:43:45 61SNR030_210_0084
ProCarManuals.com
DYNOMITE -2009-


(#'



 )
21-8321-83
A/C Compressor Replacement
A C
B
6x1.0mm
9.8 N·m
(1.0 kgf·m,
7.2 lbf·ft)
A
B
13. Remove the self-tapping screws, the heater core cover (A), the grommet (B). and carefully pull out
the heater core (C).
14. Install the heater core and the evaporator core in the reverse order of removal.
15. Install the heater unit in the reverse order of removal, and note these items:
 Do not interchange the inlet and outlet heater hoses, and install the hose clamps securely.
 Refill the cooling system with engine coolant (see page 10-8).
 Make sure that there is no coolant leakage.
 Make sure that there is no air leakage.
 Refer to evaporator core replacement (see page 21-78).
16. Do the battery terminal reconnection procedure (see page 22-68). NOTE: Do not install an A/C compressor into a system
unless you are completely sure that the system is free
of contamination. Installing the A/C compressor into a
contaminated system can result in premature A/C
compressor failure.
1. If the A/C compressor is marginally operable, run the engine at idle speed, and let the air
conditioning work for a few minutes, then shut the
engine off.
2. Recover the refrigerant with a recovery/recycling/ charging station (see page 21-90).
3. Remove the drive belt (see page 4-31).
4. Remove the front bulkhead and the condenser fan shroud (see page 10-19).
5. Remove the splash shield (see page 20-172).
6. Remove the bolt and the nut, then disconnect the suction hose (A) and discharge hose (B) from the
A/C compressor. Plug or cap the lines immediately
after disconnecting them to avoid moisture and
dust contamination.
(cont’d)
08/08/21 14:43:45 61SNR030_210_0084
ProCarManuals.com
DYNOMITE -2009-


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).
08/08/21 14:43:45 61SNR030_210_0085
ProCarManuals.com
DYNOMITE -2009-




(#'






")
µµ
µ
Clearance: 0.35 0.65 mm (0.014 0.026 in.)Field Coil Resistance: 3.15 3.45 20 °C (68 °F)
21-85
A/C Compressor Clutch Check
A
B
A
1. Check the armature plate for discoloration, peeling,or other damage. If there is damage, replace the
clutch set (see page 21-86).
2. Check the rotor pulley bearing play and drag by rotating the rotor pulley by hand. Replace the
clutch set with a new one if it is noisy or has
excessive play/drag (see page 21-86).
3. Measure the clearance between the rotor pulley (A) and the armature plate (B) all the way around. If the
clearance is not within specified limits, remove the
armature plate (see page 21-86) and add or remove
shims as needed to increase or decrease clearance.
NOTE: The shims are available in four thicknesses:
0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm. 4. Check the thermal protector for continuity between
the A/C compressor clutch connector terminals
No. 1 and No. 3. If there is no continuity, replace the
thermal protector (see page 21-87).
NOTE: The thermal protector will have no
continuity above about 122 to 128 °C (252 to 262 °F).
When the temperature drops below about 116 to
104 °C (241 to 219 °F), the thermal protector will
have continuity.
5. Disconnect the field coil connector (A). Check resistance of the field coil. If resistance is not within
specifications, replace the field coil (see page
21-86).
08/08/21 14:43:46 61SNR030_210_0086
ProCarManuals.com
DYNOMITE -2009-




(#'






!)
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.
08/08/21 14:43:47 61SNR030_210_0087
ProCarManuals.com
DYNOMITE -2009-


(#'




 )

(#'





 )
21-8721-87
A/C Compressor Thermal Protector
Replacement A/C Compressor Relief Valve
Replacement
7.4 N·m
(0.8 kgf·m, 5.5 lbf·ft)A
CB
B
A A
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
B
1. Remove the bolt and the holder (A). Disconnect the
field coil connector (B), then remove the thermal
protector (C).
2. Replace the thermal protector (A) with a new one, and apply silicone sealant (B) to the bottom of the
thermal protector.
3. Install the thermal protector in the reverse order of removal. NOTE: If the A/C compressor relief valve released
refrigerant to the atmosphere, determine and correct
the cause of the excessive system pressure, then
replace the relief valve.
1. Recover the refrigerant with a recovery/recycling/ charging station (see page 21-90).
2. Remove the relief valve (A), and the O-ring (B). Plug the opening to keep foreign matter from entering
the system and the A/C compressor oil from
running out.
3. Clean the mating surfaces.
4. Replace the O-ring with a new one at the relief valve, and apply a thin coat of refrigerant oil before
installing it.
5. Remove the plug, and install and tighten the relief valve.
6. Charge the system (see page 21-92).
08/08/21 14:43:48 61SNR030_210_0088
ProCarManuals.com
DYNOMITE -2009-




(#'


 )
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).
08/08/21 14:43:49 61SNR030_210_0089
ProCarManuals.com
DYNOMITE -2009-