Heater and Cooling Unit

Heater and Cooling Unit Removal and Installation

Removal

WARNING:
Failure to follow the following procedure and WARNING may cause air bag deployment, personal injury, damage to parts, or air bag being unable to deploy.
- Never rest a steering column assembly on steering wheel with air bag (inflator) module face down and column vertical.
- When handling the air bag (inflator) modules (driver and passenger), be careful not to drop it or apply an impact to it. If an excessive impact was applied (e.g., dropped from a height of 91.4 cm (3 feet) or more, never attempt disassembly or repair but replace it with a new one.
- When grease, cleaning agent. Oil, water, etc. has got onto air bag (inflator) modules (driver and passenger), wipe off immediately with a dry cloth.

1. Disconnect negative (-) cable at battery.
2. Disable air bag system. Refer to Disabling Air Bag System.
3. Recover refrigerant by using recovery and recycling equipment. Be sure to follow the instruction manual for the equipment.




4. Drain engine coolant and disconnect heater hoses (1) from heater unit.




5. Disconnect suction hose (1) and condenser outlet hose (2) by removing attaching bolt (3).
6. Remove instrument panel referring to Instrument Panel Removal and Installation.
7. Remove blower unit referring to Blower Unit Removal and Installation.
8. Disconnect rear duct from heater unit.
9. Disconnect wire coupler for A/C evaporator temperature sensor.
10. Disconnect air flow control actuator lead wire at coupler (1) and temperature control actuator lead wire at coupler (2).




11. Remove SDM (3).




12. Remove heater and cooling unit.
13. Remove heater core referring to Heater Unit Removal and Installation.
14. Remove pipe assembly (1) from expansion valve.




15. Remove air joint duct (3) from heater and cooling unit.




16. Remove evaporator (1) with expansion valve (2), and then heater and cooling unit.

Installation
1. Install heater and cooling unit by reversing removal procedure, noting the following items.
- When installing each part, be careful not to catch any wiring harness.
- When installing steering column assembly, refer to Steering Column Removal and Installation.

2. Fill engine coolant to radiator.
3. Enable air bag system. Refer to Enabling Air Bag System.
4. Evacuate and charge system. Refer to Operation Procedure for Charging A/C with Refrigerant.