Do the battery terminal disconnection procedure.

Disconnect the A/C line from the evaporator core.

Drain the engine coolant from the radiator.

From the inlet heater hose, remove the clip (A). Slide the hose clamps (B) back, then disconnect the inlet heater hose (C) and the outlet heater hose (D) from the heater unit. 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.

Remove the mounting nut from the heater unit. Take care not to damage or bend the fuel lines or brake lines, etc.

Remove the dashboard.

Disconnect the connectors (A) from the blower motor and the recirculation control motor. Remove the clips (B).

Disconnect these connectors (A): The mode control motor, the power transistor, the evaporator temperature sensor, air mix control motor. Remove the wire harness (B).

Remove the duct (A) and the drain hose (B). Remove the mounting nuts and blower-heater unit (C).

Remove the self-tapping screws and the heater core cover (A), the stay (B), the grommet (C), and carefully pull out the heater core (D).

Install the heater core, and the evaporator core in the reverse order of removal.

Install the heater unit in the reverse order of removal, and note these items:

Do the battery terminal reconnection procedure.