Power Supply and Ground Circuit For Front Air Control

Power Supply and Ground Circuit for Front Air Control

SYMPTOM: A/C system does not come on.

Inspection Flow:

INSPECTION FLOW

COMPONENT DESCRIPTION




Front Air Control
The front air control has a built-in microcomputer which processes information sent from various sensors needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, defroster door motor, blower motor and compressor are then controlled.

The front air control is unitized with control mechanisms. When the various switches and temperature dial are operated, data is input to the front air control.

Self-diagnostic functions are also built into the front air control to provide quick check of malfunctions in the air conditioner system.




Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set from cold to hot or any intermediate position by rotating the temperature dial.

Diagnostic Procedure For A/C System:

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM

SYMPTOM: A/C system does not come on.