2006 ACURA CSX air conditioning


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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
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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.
08/08/21 14:44:52 61SNR030_210_0091
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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
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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).
08/08/21 14:44:53 61SNR030_210_0093
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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
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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
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Performance Test
21-99
A/C System Test
A
B
 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.
The performance test will help determine if the A/C
system is operating within specifications.
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. Do the A/C system inspection (see page 21-6), and correct any problems found.
2. Connect an R-134a refrigerant recovery/recycling/ charging station to the high-pressure service port
and the low-pressure service port, following the
equipment manufacturer’s instructions.
3. Determine the relative humidity and air temperature.
4. Open the glove box. Remove the glove box stop on each side, then let the glove box hang down
(see page 20-104).
5. Insert a thermometer (A) in the center vent. 6. Place a thermometer (B) near the blower unit’s
recirculation inlet duct.
7. Test conditions:  Move the vehicle out of direct sunlight and let itcool down to the surrounding (ambient)
temperature. If necessary, wash the vehicle to
cool it down more quickly.
 The ambient temperature must be at least 16 °C (60 °F).
 Open the hood.
 Open the front doors.
 Set the temperature control dial to Max Cool, the mode control switch to Vent, and the
recirculation control switch to Recirculate.
 Turn the A/C switch ON and the fan switch to Max.
 Hold the engine speed at 1,500 rpm.
 No driver or passengers in the vehicle.
8. Inspect the A/C components for the following conditions:
 A/C compressor clutch not engaged.
 Abnormal frost areas.
 Unusual noises.
If you observe any of these conditions, refer to the
Symptom Troubleshooting Index.
9. After running the air conditioning for 10 minutes under the above test conditions, read the delivery
temperature from the thermometer in the center
vent, the intake temperature near the blower unit,
and the discharge (high) and suction (low)
pressures on the A/C gauges.
(cont’d)
08/08/21 14:44:55 61SNR030_210_0100
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Voice control does not work/respond
YES
NO
YES
NO
YES
NO
23-123
NAVIGATION UNIT CONNECTOR D (5P) NAVI GUIDE (GRN)
NOTE: Check the vehicle battery condition first.
 Make sure that the correct DVD color and version are installed.
 Check any official Honda service website for more service information about the navigation system.
 Check the connector for poor connection or loose terminals.
 Before troubleshooting, make sure you have the navigation system 4-digit anti-theft code.
 After troubleshooting, enter the navigation system anti-theft code.
Before assuming that a voice complaint is hardware
related, ensure that the voice control system is being
operated correctly.  Make sure you are on the correct screen when trying to issue a voice command. For instance, the
command ‘‘Find the nearest Italian Restaurant’’ only
works on a Map screen (See the Navigation System
Manual for a complete list of allowed voice
commands for the information being displayed.).
 Close the windows, moonroof, and doors.
 Set the fan speed to low (1 or 2).
 Adjust the air flow from the air conditioning vents so that they do not blow against the microphone on the
ceiling.
 Pause after pressing the navigation TALK button, then give a voice command clearly in a natural
speaking voice. If the system cannot recognize your
command, speak louder.
 If the microphone picks up voices other than yours, the system may not interpret your voice commands
correctly.
 If you speak a command with something in your mouth, or your voice is too husky, the system may
misunderstand your command.
 Compare the system operation with a known-good vehicle. Have more than one person test the system
operation. If the known-good vehicle performs the
same, it is a characteristic of the system. 1. Turn the ignition switch to ON (II).
2. Go into the Diagnostic Menu and use the Mic Level
test under Functional Setup (see page 23-147) to
check the operation of the navigation TALK and
navigation BACK buttons.
Go to step 10.
Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Do the voice control switch test (see page 23-156).
Go to step 5.
Replace the voice control switch.
5. Disconnect the cable reel 20P connector and navigation unit connector D (5P).
6. Check for continuity between body ground and navigation unit connector D (5P) terminal No. 4.
Repair short to body ground in the wire
between the navigation unit and the voice control
switch, or replace the cable reel.
Go to step 7.
(cont’d)
Wire side of female terminals
Ar e t he nav i gat i on T ALK and nav i gat i on BACKbut t ons oper at i onal ?
I s t he v oi ce cont r ol sw i t ch OK ?
Is there continuity?
08/08/21 14:07:26 61SNR030_230_0126
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