Lumina V6-191 3.1L VIN T MFI (1993)
Air Door Actuator / Motor: Initial Inspection and Diagnostic Overview
System Diagnosis
HVAC: Air Delivery And Temperature Control System Check
System Check
Symptom Table
Symptom Table
Perform the System Check and refer to the Symptom Table for the appropriate diagnostic procedures.
Troubleshooting Hints
1. Check for vacuum to the Solenoid Box.
2. Check HVAC Fuse and CLUST Fuse.
3. Move the Temperature Lever to full "COLD" and then full "HOT." Listen for the sound of the Servo Motor moving the valve through its full
range.
^
Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage
check.
^
Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.