Test G: Incorrect/Erratic Direction Of Airflow From Outlets - EATC

PINPOINT TEST G: INCORRECT/ERRATIC DIRECTION OF AIRFLOW FROM OUTLETS - EATC

G1-G4:

G4-G6:

G7-G8:

G9-G10:

G11-G14:

G14-G15:

G16-G17:

Normal Operation
Under normal operation, the electronic automatic temperature control (EATC) module is provided vacuum from the engine. When a mode is selected, vacuum is applied to the desired vacuum control motor that is connected to the mode door you want to control.

Possible Causes
- Electronic automatic temperature control (EATC) module
- Heater control valve
- Vacuum control motor
- Stuck or bound linkage or door
- Leaking or plugged vacuum hose