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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 993 (Heater & Air Conditioning System) >> On-Vehicle Maintenance >> Fluorescent Leak Detector >> Inspection >> Dye Injection

Dye Injection

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This procedure is only necessary when recharging the A/C system or when the compressor has seized and has been replaced.
  1. Check the A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm2 , 50 psi).
  2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (J-41459).
    CAUTION: If repairing the A/C system or replacing a component, pour the dye directly into the open system connection and proceed with the service procedures.
  3. Connect the injector tool to the A/C LOW PRESSURE side service valve.
  4. Start the engine and switch the A/C ON and fan ON.
  5. While the A/C is operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye through the low-pressure service valve using dye injector tool (J-41459), refer to the manufacturer's operating instructions.
  6. With the engine still running, disconnect the injector tool from the low-pressure service valve.
  7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the leak size, operating conditions and location of the leak, it may take from a few minutes to a few days for the dye to penetrate the leak and become visible.
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