S15/T15 2WD P/U V6-262 4.3L VIN Z (1992)
Air Door Actuator / Motor: Symptom Related Diagnostic Procedures
Airflow Only From Floor And Defrost Registers With Control In Any Position
Incorrect Airflow With Control In One Position
Without A/C
If the "Functional Test" or other diagnosis indicates improper air delivery or a failure to shift modes when the mode lever is moved, check the attachment
of the affected control cable at the heater module. Be sure the cable loop is connected to the crank pin and the cable sheath is retained.
If the cause of the problem is not discovered, disconnect the control cable at the crank pin and check the air control valve travel and effort. If there is
proper valve travel and effort, check the control cable travel at the heater module end while moving the mode lever. If the cable end doesn't move, check
for a broken cable or control assembly part and for an unattached cable end at the control assembly. Also, check for a sharp kink in the control cable
sheath that could cause severe binding.