Air Conditioning System

HVAC 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 referring to Disabling Air Bag System: Advanced Air Bag or Disabling Air Bag System: Except Advanced Air Bag.
3. Recover refrigerant from A/C system using recovery and recycling equipment referring to "Recovery" in Operation Procedure for Charging A/C with Refrigerant.
4. Drain engine coolant and disconnect heater hoses (1) from HVAC unit.
5. Disconnect suction hose (2) and condenser outlet hose (3) by removing attaching bolt (4).






6. Remove instrument panel referring to Instrument Panel Removal and Installation.
7. Disconnect rear duct from HVAC unit.
8. Detach wiring, connectors and clamps from HVAC unit.
9. Remove HVAC unit (1).






Installation
1. Install HVAC unit by reversing removal procedure, noting the following items.
- When installing each part, be careful not to catch any wiring harness.
- Replenish specified amount of compressor oil to compressor suction side referring to Precautions on Replenishing Compressor Oil.
- Install padding (1) to installation hole uniformly.






- Fill engine coolant to radiator.
- Enable air bag system referring to Enabling Air Bag System: Advanced Air Bag or Enabling Air Bag System: Except Advanced Air Bag.
- Evacuate and charge system. Refer to Operation Procedure for Charging A/C with Refrigerant.