Acura RL. Manual - part 586

Fig. 165: Identifying High-Pressure Service Port And Low-Pressure Service Port
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Evacuate the system (see SYSTEM EVACUATION ).

3. Add the same amount of new refrigerant oil to the system that was removed during recovery. Use only

DENSO ND-OIL 8 refrigerant oil.

4. 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.

Refrigerant Capacity:

450 to 500 g

0.45 to 0.50 kg

1.0 to 1.1 lbs

15.9 to 17.6 oz

5. Check for refrigerant leaks (see REFRIGERANT LEAK TEST ).

6. Check for system performance (see A/C SYSTEM TEST ).

REFRIGERANT LEAK TEST

Special Tools Required

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:43 PM

Leak detector, Honda Tool and Equipment YGK-H-10PM or commercially available

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.

Fig. 166: Identifying High-Pressure Service Port And Low-Pressure Service Port
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2. Open the high pressure valve to charge the system to the specified capacity, then close the supply

valve, and disconnect the charging station fittings.

Select the appropriate units of measurement for your refrigerant charging station.

Refrigerant Capacity:

CAUTION:



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.

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:44 PM

450 to 500 g

0.45 to 0.50 kg

1.0 to 1.1 lbs

15.9 to 17.6 oz

3. 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.

4. If you find leaks that require the system to be opened (to repair or replace hoses, fittings, etc.), do the

refrigerant recovery.

5. After checking and repairing leaks, the system must be evacuated.

A/C SYSTEM TEST

Performance Test

The performance test will help determine if the A/C system is operating within specifications.

1. 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.

2. Determine the relative humidity and air temperature.

3. Remove the glove box (see GLOVE BOX REMOVAL/INSTALLATION ).

4. Insert a thermometer (A) in the center vent.

CAUTION:



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.

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:44 PM

Fig. 167: Identifying Thermometer Placement
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Place another thermometer (B) near the blower unit's recirculation inlet duct.

6. Test conditions:



Avoid direct sunlight.



Open hood.



Open front doors.



Set the temperature control dial to Lo and turn off the dual mode.



Run the engine at 1,500 rpm.



No driver or passengers in vehicle.

7. 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.

8. To complete the charts:



Mark the delivery temperature along the vertical line.



Mark the intake temperature (ambient air temperature) along the bottom line.



Draw a line straight up from the air temperature to the humidity.



From each point; draw a horizontal line across the delivery temperature.



The delivery temperature should fall between the two lines.



Complete the low-side pressure test and high-side pressure test in the same way.

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:44 PM

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