Nissan Altima 2007-2012 Service Manual: Heater & cooling unit assembly

Removal and Installation

COMPONENTS

1. Steering member

2. Heater and cooling unit

3. Blower unit

REMOVAL

1. Discharge the refrigerant from the A/C system. Refer to HA-24, "HFC-134a (R-134a) Service Procedure".

2. Drain the engine coolant from the cooling system. Refer to CO-12, "Changing Engine Coolant" (QR25DE), CO-35, "Changing Engine Coolant" (VQ35DE).

3. Disconnect the negative battery terminal.

4. Remove the wiper motor and linkage. Refer to WW-116, "FRONT WIPER DRIVE ASSEMBLY : Removal and Installation".

5. Remove the upper cowl (for VQ35DE only). Refer to EXT-18, "Removal and Installation".

6. Remove the strut tower bar (for VQ35DE only). Refer to FSU-12, "Exploded View".

7. Remove the lower RH cowl (for VQ35DE only). Refer to EXT-18, "Removal and Installation".

8. Disconnect the heater hoses from the heater core pipes.

CAUTION: Cap or wrap the pipe joint with a suitable material such as vinyl tape to avoid the entry of contaminants into the system.

9. Disconnect the refrigerant lines from the expansion valve. Refer to HA-31, "Component".

CAUTION: Cap or wrap the line joint with a suitable material such as vinyl tape to avoid the entry of contaminants into the system.

10. Remove the instrument panel assembly. Refer to IP-12, "Removal and Installation".

11. Remove the steering column assembly. Refer to ST-14, "Removal and Installation".

12. Disconnect the drain hose.

13. Remove the heater and cooling unit assembly attached to the steering member as one assembly from the vehicle.

14. Remove the blower unit from the heater and cooling unit and steering member assembly.

15. Remove the heater and cooling unit from the steering member.

INSTALLATION

Installation is in the reverse order of removal.

• Fill the radiator with the specified water and coolant mixture. Refer to MA-12, "Fluids and Lubricants".

• Recharge the A/C system. Refer to HA-24, "HFC-134a (R-134a) Service Procedure".

    Intake sensor
    Removal and Installation REMOVAL 1. Remove the evaporator. Refer to VTL-20, "Removal and Installation". 2. Release the intake sensor clip and then remove the intake sensor. CAUTION: ...

    Blower unit
    Removal and Installation COMPONENTS 1. Heater and cooling unit 2. Blower unit Front REMOVAL 1. Remove the heater and cooling unit assembly. Refer to VTL-12, "Removal and Installation&q ...

    Other materials:

    Harness connector
    Description HARNESS CONNECTOR (TAB-LOCKING TYPE) • The tab-locking type connectors help prevent accidental looseness or disconnection. • The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the figure below. Refer to the next page for d ...

    Floor mats
    WARNING To avoid potential pedal interference that may result in a collision or injury: ● NEVER place a floor mat on top of another floor mat in the driver front position. ● Use only genuine NISSAN floor mats specifically designed for use in your vehicle model. See your NISSAN de ...

    Inspection and adjustment
    ECM RE-COMMUNICATING FUNCTION Description Performing following procedure can automatically perform re-communication of ECM and BCM, but only when the ECM has been replaced with a new one (*1). *1: New one means an ECM which has never been energized on-board. (In this step, initialization ...