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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 387 (Heater & Air Conditioning System) >> Removal And Installation >> Heater Cooling Unit Assembly >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Before servicing, turn the ignition switch off, disconnect both battery cables and wait at least three minutes.
NOTE: When removing components such as hoses, lines/tubes, etc., cap or plug openings to prevent fluid from leaking.
  1. Disconnect the negative and positive battery terminals and wait at least three minutes.
  2. Discharge the refrigerant. Refer to Recycle Refrigerant .
  3. Drain the engine coolant. Refer to Changing Engine Coolant .
  4. Remove the instrument panel assembly. Refer to Removal and Installation .
  5. Remove the steering column. Refer to Removal and Installation .
  6. Remove the front floor connecting duct (LH/RH). Refer to Removal and Installation - Front Floor Connecting Duct .
  7. Disconnect the harness connectors (B) from the super multiple junction (SMJ) block (A).
    GNSALIIA0563Z-563Courtesy of NISSAN NORTH AMERICA, INC.
  8. Disconnect the high-pressure and low-pressure pipe from the front expansion valve.
    CAUTION: Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
  9. Disconnect the heater hoses from the front heater core.
  10. Remove the cowl top extension. Refer to Removal and Installation .
  11. Remove the body panel plug (A), then remove the steering member bolt.
    GNSDB122903Courtesy of NISSAN NORTH AMERICA, INC.
  12. Remove the bolts that retain the steering member to the vehicle body.
  13. Disconnect the front drain hose from the front heating and cooling unit assembly.
  14. Disconnect the harness connectors from the front heating and cooling unit assembly and steering member.
  15. Remove the front heating and cooling unit assembly and steering member from the vehicle as an assembly.
    CAUTION: Use care not to damage the seats when removing the steering member.
  16. Remove the bolts that retain the front heating and cooling unit assembly to the steering member.
  17. Separate the front heating and cooling unit assembly from the steering member.


CAUTION: Before servicing, turn the ignition switch off, disconnect both battery cables and wait at least three minutes.
  1. Disconnect the negative and positive battery terminals and wait at least three minutes.
  2. Discharge the refrigerant. Refer to Recycle Refrigerant .
  3. Remove the back door kicking plate. Refer to Removal and Installation .
  4. Remove the luggage side lower finisher (RH). Refer to Removal and Installation .
  5. Remove the storage box side finisher. Refer to Removal and Installation .
  6. Remove the jack bracket bolts, then remove the jack bracket.
  7. Disconnect the rear underfloor high-pressure and low-pressure pipes from the rear cooling unit assembly.
    CAUTION: Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
  8. Remove the rear ventilator duct upper. Refer to Removal and Installation .
  9. Remove the rear ventilator duct lower. Refer to Removal and Installation .
  10. Disconnect the harness connectors from the rear cooling unit assembly.
  11. Remove the rear cooling unit assembly bolts.
  12. Disconnect the drain hose from the rear cooling unit assembly.
  13. Remove the rear cooling unit assembly.
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