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Ventilation System: Overhaul Nissan Pathfinder III рестайлинг

Automatic HVAC System 2 illustrations ~531 words

A/C AND AV SWITCH ASSEMBLY (AUTOMATIC A/C)

Removal and Installation

The front A/C switch is integrated into the A/C and AV switch assembly in cluster lid C in the instrument panel. Refer to " REMOVAL AND INSTALLATION " (BASE AUDIO), " REMOVAL AND INSTALLATION " (BOSE AUDIO WITHOUT NAVIGATION) or " REMOVAL AND INSTALLATION " (BOSE AUDIO WITH NAVIGATION).

FRONT HEATER AND COOLING UNIT ASSEMBLY

Removal

CAUTIONBefore servicing, turn the ignition switch off, disconnect both battery terminals, then wait at least three minutes.

Scheme 218

Scheme 218
Scheme 218
  1. Discharge the refrigerant from the A/C system. Refer to " «HFC-134A (R-134A) SERVICE PROCEDURE»(ref-519773-S12950466872012122900000) ".
  2. Drain the coolant from the engine cooling system. Refer to " «CHANGING ENGINE COOLANT»(ref-519776-S40250594332012122900000) " (VQ40DE), " «CHANGING ENGINE COOLANT»(ref-519791-S03863245732012122900000) " (VK56DE).
  3. Move the front seats to the rearmost position on the seat track.
  4. Disconnect the battery negative and positive terminals, then wait at least three minutes.
  5. Remove the front heater core pipes RH nut.
  6. Disconnect the front heater core hoses from the front heater core.
  7. Disconnect the high- and low-pressure A/C pipes from the front expansion valve.
  8. Remove the instrument panel and center console. Refer to " «REMOVAL AND INSTALLATION»(ref-519812-S25020407392012122900000) ".
  9. Remove the two front floor ducts. Refer to " «COMPONENT»(ref-519826-S13679343262012122900000) ".
  10. Remove the steering column. Refer to " «REMOVAL AND INSTALLATION»(ref-519785-S07114900312012122900000) ".
  11. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse block (SMJ) electrical connectors. Refer to " «HARNESS LAYOUT»(ref-553889-S37780507982013051800000) ".
  12. Remove the covers then remove the three steering member bolts from each side to disconnect the steering member from the vehicle body. Refer to " «EXPLODED VIEW»(ref-519812-S11522701602012122900000) ".
  13. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehicle. CAUTION: Use care not to damage the seats and interior trim panels when removing the front heater and cooling unit assembly with it attached to the steering member.
  14. Remove the front heater and cooling unit assembly from the steering member.

Installation

Installation is in the reverse order of removal.

  1. Fill the engine cooling system with the specified coolant mixture. Refer to " «CHANGING ENGINE COOLANT»(ref-519776-S40250594332012122900000) " (VQ40DE), " «CHANGING ENGINE COOLANT»(ref-519791-S03863245732012122900000) " (VK56DE).
  2. Recharge the A/C system. Refer to " «HFC-134A (R-134A) SERVICE PROCEDURE»(ref-519773-S12950466872012122900000) ".
CAUTIONDo not reuse O-rings. Apple A/C oil to the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe installation. Refer to " COMPONENT ". After charging the refrigerant, check for leaks. Refer to " CHECKING OF REFRIGERANT LEAKS ".

REAR HEATER AND COOLING UNIT ASSEMBLY

Removal

  1. Discharge the refrigerant from the A/C system. Refer to " «HFC-134A (R-134A) SERVICE PROCEDURE»(ref-519773-S12950466872012122900000) ".
  2. Drain the coolant from the engine cooling system. Refer to " «CHANGING ENGINE COOLANT»(ref-519776-S40250594332012122900000) " (VQ40DE), " «CHANGING ENGINE COOLANT»(ref-519791-S03863245732012122900000) " (VK56DE).
  3. Remove the luggage side lower and upper finisher RH. Refer to " «REMOVAL AND INSTALLATION»(ref-519822-S32750843902012122900000) ".
  4. Disconnect the rear heater core hoses from the rear heater core.
  5. Disconnect the rear A/C high- and low-pressure A/C pipes from the rear expansion valve.
  6. Disconnect the following electrical connectors: Rear blower motor Rear variable blower control (rear) Rear air mix door motor
  7. Disconnect the ducts from the rear heater and cooling unit assembly.
  8. Remove the 3 bolts and the rear heater and cooling unit assembly.

Installation

Installation is in the reverse order of removal.

  1. Fill the engine cooling system with the specified coolant mixture. Refer to " «CHANGING ENGINE COOLANT»(ref-519776-S40250594332012122900000) " (VQ40DE), " «CHANGING ENGINE COOLANT»(ref-519791-S03863245732012122900000) " (VK56DE).
  2. Recharge the A/C system. Refer to " «HFC-134A (R-134A) SERVICE PROCEDURE»(ref-519773-S12950466872012122900000) ".
CAUTIONDo not reuse O-rings. Apply A/C oil to the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe for installation. Refer to " COMPONENT ". After charging the refrigerant, check for leaks. Refer to " CHECKING OF REFRIGERANT LEAKS ".

Scheme 219

Scheme 219: Removal and Installation for Front Evaporator
Scheme 219: Removal and Installation for Front Evaporator

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