Electronic Leak Testing
- Attach the R-134a Manifold Gauge Set to the service gauge port valves.
- Leave both manifold gauge set valves closed.
- Both gauges should indicate 413-551 kPa (60-80 psi) at 24°C (75°F) with the engine off.
- If little or no pressure is indicated, charge the refrigerant system. Refer to the procedure in this section.
- Leak test the refrigerant system using the R-134a Automatic Calibration Halogen Leak Detector. Follow the instructions included with the leak detector for handling and operation techniques.
- If a leak is found, recover the refrigerant and service the system.
Fluorescent Dye Leak Detection
Fluorescent Dye Detection
- Check for leaks using a 120 Watt UV Lamp.
- Scan all components, fittings and lines of the A/C system.
- After the leak is repaired, remove any traces of leak dye with a general purpose oil solvent.
- Verify the repair by operating the system for a short time and inspecting with the UV lamp.