Front Heater And Cooling Unit Assembly

Removal

1. Discharge the refrigerant from the A/C system. Refer to "HFC-134A (R-134A) SERVICE PROCEDURE ".
2. Drain the coolant from the engine cooling system. Refer to "CHANGING ENGINE COOLANT " (VQ40DE), "CHANGING ENGINE COOLANT " (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 ".
9. Remove the two front floor ducts. Refer to "COMPONENT ".
10. Remove the steering column. Refer to "REMOVAL AND INSTALLATION ".
    Fig 1: Identifying RH Front Heater Core Pipes Nut

    Courtesy of NISSAN NORTH AMERICA, INC.
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 ".
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 ".
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.

• Fill the engine cooling system with the specified coolant mixture. Refer to "CHANGING ENGINE COOLANT " (VQ40DE), "CHANGING ENGINE COOLANT " (VK56DE).
• Recharge the A/C system. Refer to "HFC-134A (R-134A) SERVICE PROCEDURE ".