For the servicing of the HVAC control assembly, the first step would be the removal of the instrument panel accessory trim plate. Next, remove the HVAC control assembly retaining screws then press down the retaining tabs so that the HVAC control assembly can be uncovered from the instrument panel. Pull the vacuum harness connector and the electrical connectors out of the HVAC control assembly. When it comes to installation, hook up the electrical connectors to HVAC control assembly and then to vacuum harness connector. Install the HVAC control assembly in the instrument panel, ensuring all 4 retaining tabs can lock, and then secure with the retaining screws turning them to 1.9 N.m (17 lb in). Lastly, install the instrument panel accessory trim plate and perform a heater function test.