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 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. 39 (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, open the heater valve, and drain the 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 clamp, then disconnect the heater valve cable from the heater valve arm.

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 two mounting nuts from the heater unit.

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

5. Remove the dashboard.

Heater Unit - Replacement:

6. Remove the mounting bolts and mounting nuts in the following sequence, then remove the steering hanger beam.

7. Remove the heater duct or the evaporator.

Heater Unit - Replacement:

8. Disconnect the mode control motor connector, then remove the mounting bolt and the heater unit.
9. Install in the reverse order of removal. Make note of the following items.
^ Apply sealant to the grommets.
^ Do not interchange the inlet and outlet heater hoses. Make sure that the clamps are secure.
^ Loosen the bleed bolt on the engine, and refill the radiator and coolant reservoir with the proper engine coolant mixture. Tighten the bleed bolt when all the trapped air has escaped and engine coolant begins to flow from it.
^ Connect all cables, and make sure they are properly adjusted.