Mazda CX-9 Grand Touring. Manual — part 435

7. Open the high-pressure side valve of the manifold gauge and charge with refrigerant until the weight of

refrigerant tank has decreased 330-355 g {11.7-12.5 oz} from the amount in Step 2.

Fig. 8: Opening High-Pressure Side Valve Of Manifold Gauge
Courtesy of MAZDA MOTORS CORP.

8. Close the low-pressure side valve of the manifold gauge.

9. Start the engine and actuate the A/C compressor.

10. Open the low-pressure side valve of the manifold gauge and charge with refrigerant until the weight of

the refrigerant tank has decreased regular amount from the amount in Step 2.

the cans could explode, scattering metal fragments and liquid
refrigerant that can seriously injure you. Therefore, do not open
the high-pressure side valve while the engine is running.

WARNING:



If charging the system with refrigerant using service cans,
running the engine with the high-pressure side valve open is
dangerous. Pressure within the service cans will increase and
the cans could explode, scattering metal fragments and liquid
refrigerant that can seriously injure you. Therefore, do not open
the high-pressure side valve while the engine is running.

Fig. 9: Closing Low-Pressure Side Valve Of Manifold Gauge
Courtesy of MAZDA MOTORS CORP.

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

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11. Close the low-pressure side valve of the manifold gauge and the valve of the refrigerant tank.

12. Stop the engine and A/C compressor.

Fig. 10: Closing Low-Pressure Side Valve Of Manifold Gauge And Valve Of Refrigerant Tank
Courtesy of MAZDA MOTORS CORP.

LEAK TEST

1. Inspect for leakage using the a gas leak tester.



If there is no leakage, go to Step 3.



If leakage is found at a loose joint, tighten the joint, then go to the next step.

2. Inspect for leakage again.



If there is no leakage after tightening the joint, go to the next step.



If there is still leakage at the same joint, discharge the refrigerant and then repair the joint. Repeat
the charging procedure from evacuation.

3. Disconnect the manifold gauge from the charging valves.

4. Install the caps to the charging valves.

Fig. 11: Installing Caps To Charging Valves
Courtesy of MAZDA MOTORS CORP.

REFRIGERANT RECOVERY

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

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© 2005 Mitchell Repair Information Company, LLC.

1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device

manufacturer's instructions.

REFRIGERANT PRESSURE CHECK

1. Connect the manifold gauge. (See REFRIGERANT SYSTEM GENERAL PROCEDURES.)

2. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.

3. Set the fan speed MAX HI.

4. Turn the A/C switch on.

5. Set to RECIRCULATE mode.

6. Set the temperature control to MAX COLD.

7. Set to VENT mode.

8. Close all the doors and all the windows.

9. Measure the ambient temperature and high-and low-pressure side reading of the manifold gauge.

10. Verify that the intersection of the pressure reading of the manifold gauge and ambient temperature is in

the shaded zone.



If there is any malfunction, inspect the refrigerant system according to the troubleshooting chart.

Fig. 12: Ambient Temperature And High-And Low-Pressure Side Graph
Courtesy of MAZDA MOTORS CORP.

REFRIGERANT SYSTEM PERFORMANCE TEST

1. Inspect the refrigerant pressure. (See REFRIGERANT PRESSURE CHECK.)

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

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2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.

3. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.

4. Set the fan speed to MAX HI.

5. Turn the A/C switch on.

6. Set to RECIRCULATE mode.

7. Set the temperature control to MAX COLD.

8. Set to VENT mode.

9. Close all the doors and windows.

10. Wait until the air conditioner output temperature stabilizes.

Stabilized condition



The A/C compressor repeatedly turns on and off at regular intervals.

11. After the blower air is stabilized, read the dry-bulb thermometer.

12. Verify the ambient temperature.

13. Verify that the temperature reading is in the shaded zone.



If the there is any malfunction, inspect the refrigerant system according to the troubleshooting
chart.

Fig. 13: Ambient Temperature Graph
Courtesy of MAZDA MOTORS CORP.

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:13:14 AM

Page 10

© 2005 Mitchell Repair Information Company, LLC.