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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Heating, Air Conditioning & Ventilation - With Diagnostics) >> On-Vehicle Service >> Performance Test >> Refrigerant Gas Pressure Check

Refrigerant Gas Pressure Check

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • The temperature of equipment in the engine room is high and the refrigerant gas pressure is also high immediately after the engine and A/C operation are stopped, thus leave the vehicle for a while, and then perform the refrigerant gas pressure check.
  • On completion, stop the engine and wait until the high-pressure side of the gauge manifold is depressurized. Then remove the quick joints and the others.
CAUTION:
  • Place the quick joint onto the service valve, and press to fit the part A securely until the sleeve clicks into place.
  • When connecting, run your hand along the hose while pressing to ensure that there are no bends in the hose.
Fig 1: Pressing Quick Joint
G09667482Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 2: Identifying High-Pressure Side Service Valve And Low-Pressure Side Service Valve
G09667483Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  1. Check that the engine and A/C are stopped.
  2. Close the high-pressure valve of the gauge manifold.
  3. Connect the charging hose (red) to the hi-pressure side of the gauge manifold.
  4. Connect the quick joint (for high pressure) to the charging hose (red).
  5. Install the quick joint (for high pressure) to the high-pressure side service valve of the vehicle.
  6. Close the low-pressure valve of the gauge manifold.
  7. Connect the charging hose (blue) to the low-pressure side of the gauge manifold.
  8. Connect the quick joint (for low pressure) to the charging hose (blue).
  9. Install the quick joint (for low pressure) to the low-pressure side service valve of the vehicle.
  10. Start and fully warm up the engine, and then check that the engine speed of the test condition is satisfied.
  11. Set the A/C control panel to the mode instructed in the test conditions.
  12. Measure the high pressure/low pressure, and check that the measurement is within the permissible range of the table below. If the value is outside the permissible range, refer to the COOLING PERFORMANCE CHECK  result, and perform a check according to the diagnosis chart of refrigerant system.
    NOTE: Prior to the measurement, wait until the refrigerant pressure is stable. (Approximately 10 minutes after A/C operation start)
    Fig 3: Inspecting Refrigerant Gas Pressure
    G09667484Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Garage ambient temperature ° C(° F) 20(68) 25 (77) 30(86) 35(95) 40(104) 45 (113) 50(122)
Compressor high pressure kPa (psi) 881 - 1, 377 (127.8-199.7) 1, 086 - 1, 582 (157.5-229.4) 1,291 - 1,787 (187.2-259.2) 1,496 - 1,992 (217.0-278.8) 1,701 - 2,197 (246.7-318.6) 1,906 - 2,402 (276.4-348.4) 2,111 - 2,607 (306.2-378.1)
Compressor low pressure kPa (psi) 111 - 369 (16.1-53.5) 162 - 420 (23.5-60.9) 213 - 471 (30.9-60.5) 264 - 522 (38.3-75.7) 315 - 573 (45.7-83.1) 366 - 624 (53.1-90.5) 417 - 675 (60.5-97.9)
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