Heater Core Case: Service and Repair

Heater Unit Removal and Installation
Reference: Heater Unit Components

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. Remove instrument panel
5. Remove blower unit.
6. Disconnect rear duct from heater unit.
7. Disconnect air flow control actuator lead wire (1) at coupler and temperature control actuator lead wire (2) at coupler (2).




8. Remove SDM (3).




9. Remove heater unit.
10. Remove temperature control actuator from heater unit.




11. Remove heater core pipe clamp (1) and heater core bracket (2).




12. Pull out heater core (1) from heater unit.

Installation
1. Install heater 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 referring to Steering Column Removal and Installation.

2. Fill engine coolant to radiator.
3. Enable air bag system.
Refer to Enabling Air Bag System.