Heater Core Case: Service and Repair

Heater Unit

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. Drain engine coolant and disconnect heater hoses (1) from heater unit.
4. Recover refrigerant by using recovery and recycling equipment (if equipped with air conditioning). Be sure to follow the instruction manual for the equipment.
The amount of compressor oil removed must be measured and the same amount added to the system.
5. Remove instrument panel, refer to "INSTRUMENT PANEL".
6. Remove cooling unit (If equipped with air conditioning). Refer to "EVAPORATOR (COOLING UNIT)".




7. Disconnect rear duct (4) from heater unit.
8. Disconnect heater mode control actuator lead wire (1) at couplers.
9. Remove A/C controller (2) (if equipped).
10. Remove SDM (3).




11. Remove heater unit.




12. Remove heater core pipe clamps (1) and grommet (2).




13. Pull out heater core (1) from unit (2).

INSTALLATION
1. Install heater unit by reversing removal procedure, noting the following items.
- When installing each part, be careful not to catch any cable or wiring harness.
- When installing steering column assembly, refer to "STEERING COLUMN".

2. Install control cables. (Refer to "HEATER CONTROL CABLES ASSEMBLY".)
3. Fill engine coolant to radiator.
4. Enable air bag system. Refer to "ENABLING AIR BAG SYSTEM".
5. Evacuate and charge A/C system. Refer to "EVACUATING SYSTEM" and "PROCEDURE OF CHARGING".