
SYMPTOM RELATED DIAGNOSTIC
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
9. Symptom Related Diagnostic
A: GENERAL DIAGNOSTICS TABLE
Compartment temperature does not decrease
Compartment temperature does not increase
Compartment temperature does not quickly
Compartment temperature is higher than
Symptom
Illumination does not dim at night.
Fresh to Recirc or vise versa.
Condenser fan does not operate
Blower motor does not rotate or
Air outlet cannot be switched.
A/C system fails to operate.
or lower than the set value.
(No cool air is discharged).
A/C does not change from
(No hot air is discharged).
respond to the set value.
during A/C operation.
rotates erroneously.
Burned-out fuse.
Component parts
Fuses (M/B No. 5, F/B No. 17)
Poor connector contacts
Ground
Auto A/C control module
Air mix door actuator and potentiometer (including
links)
Mode door actuator and potentiometer (including
links)
Intake door actuator and potentiometer (including
links)
Blower fan motor
Blower fan relay
A/C relay
Compressor (magnet clutch)
Radiator fan motors (Main and sub)
Radiator fan relays (Main and sub)
Sensors (In-vehicle, ambient, water temperature,
evaporator, sunload, etc.) (Evaporator
sensor)
In-vehicle sensor aspirator hose
AC-00681
AC-38