Heater & Cooling Unit Assembly

HEATER & COOLING UNIT ASSEMBLY

Removal and Installation

COMPONENTS

Exploded View VTL-12:

REMOVAL
1. Discharge the refrigerant from the A/C system. Refer to "HFC-134a (R-134a) Service Procedure".
2. Drain the engine coolant from the cooling system.
3. Disconnect the negative battery terminal.
4. Remove the wiper motor and linkage.
5. Remove the upper cowl (for VQ35DE only).
6. Remove the strut tower bar (for VQ35DE only).
7. Remove the lower RH cowl (for VQ35DE only).
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.

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.
11. Remove the steering column assembly.
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 "Fluids and Lubricants".
- Recharge the A/C system. Refer to "HFC-134a (R-134a) Service Procedure".