Air Distribution System Description

A vacuum regulates the control of air through the system. Various positions on the control cause the mode valves to mix and direct cooled, heated and outside air through the air ducts.

Air flows through the HVAC system as described for each of the following modes:
^ OFF
A light bleed of air flows from all of the outlets.

^ MAX
Recirculated air flows through the instrument panel outlets.

^ NORM, A/C
Outside air flows through the instrument panel outlets.




^ BI-LEVEL
Outside air flows through the following outlets:
^ The instrument panel outlets
^ The floor outlets




^ VENT
Outside air flows through the instrument panel outlets.
The compressor does not operate.




^ HEATER
Most of the air flows through the floor outlets.
A small amount of air flows through the defroster duct.




^ DEFOG
Equal amounts of air flow through the floor outlets and the defrost outlets.




^ DEFROST
Most of the air flows through the defroster outlets.
A small amount of air flows through the floor outlets.

The operation of the cooling fan is controlled by the PCM through the cooling fan relay.

Ducts and Outlets
A system of ducts and outlets direct air to the passenger compartment.

Obstructions in the ducts and outlets may cause poor air output. Inspect the following air passages for obstruction, such as leaves or dirt:
^ The defroster duct
^ The heater duct
^ The A/C ducts
^ The vent ducts
^ The side window defoggers