S15/T15 2WD Jimmy V6-262 4.3L VIN W CPI (1993)
Air Door Actuator / Motor: Description and Operation
SYSTEM DESCRIPTION
Control of air through the system is regulated by vacuum. At various positions of the levers on the control head, mode doors mix and direct cooled,
heated, and outside air through the air ducts.
VACUUM LINES
Vacuum lines are molded to a connector which is attached to a vacuum control switch on the control assembly. In case of leakage or hose collapse, it will
not be necessary to replace the entire harness assembly. Replacement can be made by cutting the hose and inserting a plastic connector. If the entire hose
must be replaced, cut all hoses off at the connector and then attach hoses directly to the control assembly vacuum switch.
VACUUM TANK
During heavy acceleration, the vacuum supply from the intake manifold drops. Under load conditions a check valve in the vacuum tank maintains
vacuum so that it will be available for future use. The vacuum tank is located in the engine compartment.
DUCT AND OUTLETS
A system of ducts and outlets directs air to the passenger compartment. In cases of poor air output, defroster, heater, AC, and vent ducts should be
checked for obstructions such as leaves, dirt, or objects which may have fallen into the ducts from the passenger compartment.
