Heater Core Case: Service and Repair

HEATER & COOLING UNIT ASSEMBLY

Removal and Installation











NOTE:
When removing components such as hoses, tubes/lines, ect., cap or plug openings to prevent fluid from spilling.

REMOVAL

1.Discharge the refrigerant from the A/C system. HFC-134A (R-134A) Service Procedure.
2.Drain the engine coolant from the cooling system. Changing Engine Coolant.
3.Reposition the lower dash insulator out of the way.
4.Disconnect the heater hoses from the heater core pipes.
5.Disconnect the refrigerant lines from the evaporator (if equipped). Locations.

CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid entry of contaminants.
6.Remove the steering column.
7.Remove the instrument panel assembly. Removal And Installation.
8.Remove the lower steering member stays.
9.Disconnect the following components.
- Shift lock cable
- Steering harness clips
- SMJ
- Fuse box
- Door harness
- Front pillar harness
- CVT shift cable (if equipped)
- M/T shift cable (if equipped)
- A/C drain hose
- Air bag module control unit
10.Disconnect the evaporator drain hose.
11.Remove the steering member bolt caps.
12.Support both front doors with a suitable jack.
13.Remove both front door upper hinge bolts.
14.Remove the steering member bolts.
15.Temporarily install the front door upper hinge bolts.
16.Remove the heater and cooling unit and the steering member from the vehicle as one unit.

CAUTION:
Be careful not to damage the interior and seat trim when removing the heater and cooling unit assembly and steering member from the vehicle.
17.Disconnect the following components to separate the heater and cooling unit assembly from the steering member.
- Front blower motor
- Heater harness connector(s)
- Fan control amplifier
- Air mix door motor
- Mode door motor
- Intake door motor
18.Remove the heater and cooling unit assembly from the steering member.

INSTALLATION

Installation is in the reverse order of removal.
- If replacing heating & cooling unit assembly, transfer the drain hose.
- Fill the radiator with the specified water and coolant mixture. Changing Engine Coolant.
- Recharge the A/C system. HFC-134A (R-134A) Service Procedure.
- Check and adjust the front door alignment as necessary. Adjustments.