Removal and Installation

Heater Unit Replacement:

CAUTION:
- All SRS wire harnesses are covered with yellow insulation. Before you disconnect any part of an SRS wire harness, disconnect the airbag connectors.
- Whenever the ignition switch is ON (II), or has been turned OFF for less than three minutes, be careful not to bump the SRS unit; the airbags could accidentally deploy and cause damage or injuries.
- For additional precautions, refer to "Air Bags and Seat Belts".

NOTE: The original radio has a coded theft protection circuit. Be sure to get the customer's code number before
- disconnecting the battery.
- removing the No. 32 (7.5 A) fuse from the under-hood fuse/relay box.
- removing the radio.

After service, reconnect power to the radio and turn it on. When the word "CODE" is displayed, enter the customer's 5-digit code to restore radio operation.

1. When the engine is cool, drain engine coolant from the radiator.

WARNING: Do not remove the radiator cap when the engine is hot; the engine coolant is under pressure and could severely scald you.

Heater Unit Replacement:

2. Open the cable clamp, then disconnect the heater valve cable from the heater valve.

Heater Unit Replacement:

3. Disconnect the heater hoses from the heater unit.

CAUTION: Engine coolant will damage paint. Quickly rinse any spilled engine coolant from painted surfaces.

NOTE: Engine coolant will run out when the hoses are disconnected, drain it into a clean drip pan.

Heater Unit Replacement:

4. Remove the heater unit mounting nut from the engine compartment side.

NOTE: When removing the nut, take care not to damage or bend the fuel pipes, brake pipes, etc.

5. Remove the dashboard.
6. Remove the heater duct or evaporator.

Heater Unit Replacement:

7. Remove the steering column bracket.

Heater Unit Replacement:

8. Remove the wire harness clip, two heater mounting nuts and heater unit.
9. Install the removed parts in the reverse order of removal, and:
^ Do not interchange the inlet and outlet hoses.
^ Loosen the bleed bolt on the engine and refill the radiator and reservoir tank with the proper engine coolant mixture.
Tighten the bleed bolt when all the trapped air has escaped and engine coolant begins to flow steadily from it.
^ Connect all cables and make sure they are properly adjusted.