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Home >> Mitsubishi >> 2006 >> Montero >> Repair and Diagnosis >> External Pages >> Different car >> Section 34 (Automatic Air Conditioning) >> On-Vehicle Service >> Performance Test

Performance Test

WARNING: This page is about a different car, the 2005 Mitsubishi Montero. However, it is still accessible from the selected car via links, so may be relevant.
  1. The vehicles to be tested should be in a place that is not in direct sunlight.
  2. Close the high and low-pressure valve of the gauge manifold.
  3. Connect the charging hose (blue) to the low-pressure valve and connect the charging hose (red) to the high-pressure valve of the gauge manifold.
  4. Install the quick joint (for low-pressure) to the charging hose (blue), and connect the quick joint (for high-pressure) to the charging hose (red).
    CAUTION:
    • To connect the quick joint, press section A firmly against the service valve until a click is heard.
    • When connecting, run your hand along the hose while pressing to ensure that there are no bends in the hose.
  5. Connect the quick joint (for low-pressure) to the low-pressure service valve and connect the quick joint (for high-pressure) to the high-pressure service valve.
    NOTE: The high-pressure service valve is on A/C pipe and the low-pressure service valve is on the suction hose.
  6. Start the engine.
  7. Set the A/C controls as follows:

    < Testing the front-A/C >

    • A/C switch: A/C - ON position
    • Mode selection: FACE position
    • Temperature control: MAXIMUM COOLING position
    • Air selection: RECIRCULATION position
    • Blower switch: FAST position
  8. Set the A/C controls as follows:

    < Testing the rear-A/C >

    • The front A/C should be set as described in step  7.
    • A/C switch: A/C-ON position
    • Temperature control: MAXIMUM COOLING position
    • Blower switch: FAST position
  9. Adjust engine speed to 1,500 r/min with A/C clutch engaged.
  10. Engine should be warmed up with doors and windows closed.
    Fig 1: Connecting Charging Hose (Blue) To Low-Pressure Valve And Connecting Charging Hose (Red) To High-Pressure Valve Of Gauge Manifold
    G02430002Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  11. Insert a thermistor-type thermometer into the air vent shown in the figure, and measure the air temperature.
  12. Note the discharge air temperature.
    NOTE: If the clutch cycles, take the reading before the clutch disengages.
    Fig 2: Inserting Thermistor-Type Thermometer Into Air Vent
    G02430003Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 3: Identifying Thermometer
    G02430004Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
PERFORMANCE TEMPERATURE CHART (FRONT-A/C TEST)

GARAGE AMBIENT TEMPERATURE °C (°F)  20 (68)  25 (77)  35 (95)  40 (104) 
Discharge air temperature °C (°F) 3.5 - 5.5 (38 - 42) 3.5 - 5.5 (38 - 42) 4.5 - 6.5 (40 - 44) 5.5 - 7.5 (42 - 46)
Compressor high pressure kPa (psi) 1,050 - 1,250 (152 - 181) 1,050 - 1,250 (152 - 181) 1,400 - 1,600 (203 - 232) 1,650 - 1,850 (239 - 268)
Compressor low pressure kPa (psi) 120 - 140 (17 - 20) 120 - 140 (17 - 20) 130 - 150 (19 - 22) 160 - 180 (23 - 26)
PERFORMANCE TEMPERATURE CHART (REAR-A/C TEST)

GARAGE AMBIENT TEMPERATURE °C (°F)  20 (68)  25 (77)  35 (95)  40 (104) 
Discharge air temperature °C (°F) 5.5 - 7.5 (42 - 46) 5.5 - 7.5 (42 - 46) 6.5 - 8.5 (44 - 47) 7.5 - 9.5 (46 - 49)
Compressor high pressure kPa (psi) 1,150 - 1,350 (167 - 196) 1,150 - 1,350 (167 - 196) 1,500 - 1,700 (218 - 247) 1,750 - 1,950 (254 - 283)
Compressor low pressure kPa (psi) 130 - 150 (19 - 22) 130 - 150 (19 - 22) 140 - 160 (20 - 23) 180 - 200 (26 - 29)
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