Heater Core: Service and Repair
Remove or Disconnect1. Battery negative (-) cable.
^ Partially drain coolant.
2. Glove box unit and right-side lower sound insulator.
3. Programmer and electrical connectors.
4. Heater core cover.
5. Inlet and outlet heater hoses from heater core.
6. Two heater retaining screws.
7. Heater core.
Install or Connect
1. Heater core to heater case, securing with two screws.
2. Inlet and outlet heater hoses to heater core.
3. Heater core cover.
4. Programmer and electrical connections.
5. Glove box unit and right-side lower sound insulator.
6. Battery negative (-) cable.
^ Refill cooling system.
Adjust
^ Perform the "AIR MIX VALVE ADJUSTMENT" procedure.
AIR MIX VALVE ADJUSTMENT
ACP Linkage:
1. Remove right-side sound insulator and glove box.
2. Set the ECC temperature control to 32°C (90°F). Allow one to two minutes for the programmer arm to travel to its maximum heat position.
3. Unsnap threaded rod from the plastic retainer on the programmer output arm.
4. Check the air mix valve for free travel (push the valve to maximum A/C position and check for binding).
5. Pre-load air mix valve in the maximum heat position by pulling the threaded rod to ensure that the valve is sealing. The programmer arm should be in the maximum heat position.
6. Snap the threaded rod into the plastic retainer on the programmer arm. Do this carefully to avoid influencing the programmer arm or air mix valve position.
7. Set the temperature setting on the control panel to 16°C (60°F). Verify that the programmer arm and air mix valve travels to the maximum A/C position.