TL FWD V6-3.5L (2009)
Heater Core Case: Service and Repair
Heater Unit/Core Replacement
SRS components are located in this area. Review the SRS component locations See: Restraint Systems/Air Bag Systems/Locations and the precautions
and procedures See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Air Bag(s) Arming and Disarming/Service and Repair
before doing repairs or service.
1. Do the battery terminal disconnection procedure. See: Starting and Charging/Battery/Service and Repair/Procedures
2. Recover the refrigerant with a recovery/recycling/charging station. See: Service and Repair/A/C Refrigerant Recovery
3. Disconnect the A/C line from the evaporator core. See: Evaporator Core/Service and Repair
4. When the engine is cool, drain the engine coolant from the radiator. See: Engine, Cooling and Exhaust/Cooling System/Coolant/Service and
Repair
5. From under the hood, slide the hose clamps (A) back. Disconnect the inlet heater hose (B) and the outlet heater hose (C) from the heater unit. Note
the orientation of the hoses.
Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on the electrical parts or
the painted surfaces. If any coolant spills, rinse it off immediately.
6. Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines or the brake lines.
7. Remove the dashboard. See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair/Dashboard
Replacement
8. Disconnect the left engine compartment wire harness connectors (C301 and 302) (A). Remove the ducts (B), and the drain hose (C). Then remove
the mounting nuts, and the blower-heater unit (D).
