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VTL-12 < ON-VEHICLE REPAIR > HEATER & COOLING UNIT ASSEMBLY HEATER & COOLING UNIT ASSEMBLY Removal and Installation INFOID:0000000004205418 COMPONENTS 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" CO-35, "Changing Engine Coolant" (VQ35DE). 3. Disconnect the negative battery terminal. WW-116, "FRONT WIPER DRIVE ASSEMBLY : Removal 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 . 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 contam- inants into the system. 9. Disconnect the refrigerant lines from the expansion valve. Refer to CAUTION: Cap or wrap the line joint with a suitable material such as vinyl tape to avoid the entry of contami- nants 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. vehicle. 1. Steering member 2. Heater and cooling unit 3. Blower unit ALIIA0017GB |