Grand AM L4-138 2.3L DOHC VIN D MFI (1994)
Air Door Actuator / Motor: Testing and Inspection
Troubleshooting Hints
1. Check for Manifold Vacuum to the Vacuum Tank at the BLACK hose from the engine and at the VIOLET hose to the Heater-A/C and Rear
Defogger Control Assembly.
2. Check the operation of the Temperature Valve by setting the Temperature Selector first to the COLD position then to the HOT position and back
again. The Temperature Valve should move evenly through its full travel each time the temperature setting is changed. If the valve moves
unevenly or erratically check that the valve is not binding at some point.
^ Refer to HVAC System Check for a guide to normal operation.
^ Refer to System Diagnosis.