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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 339 (Automatic Air Conditioning) >> Refrigerant Lines >> Dye Injection

Dye Injection

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

(This procedure is only necessary when recharging the system or when the compressor has seized and was replaced).

  1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (50 psi).
  2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (J-41459).
  3. Connect the injector tool to the A/C LOW PRESSURE side service fitting.
  4. Start engine and switch A/C ON.
  5. When the A/C 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 service fitting.
    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.
  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 minutes to days for the dye to penetrate a leak and become visible.
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