Suzuki Liana RH413 Service Manual page 883

Condition
No cool air comes out
(Blower motor does not
operate)
Cool air does not come
out or insufficient cooling
(A/C system normal
operation)
Cool air does not come
out only intermittently
Possible cause
Fuse blown
Blower motor controller faulty
Blower speed selector faulty
HVAC control module faulty
Wiring or grounding faulty
Blower motor faulty
Blower motor relay faulty
Insufficient or excessive charge of
refrigerant
Condenser clogged
A/C evaporator clogged or frosted
A/C evaporator outlet air temperature
sensor faulty
Expansion valve faulty
Desiccant clogged
Compressor drive belt loosen or broken Replace compressor drive belt.
Magnetic clutch faulty
Compressor faulty
Air in A/C system
Air leaking from heater and cooling unit
or air duct
Heater and ventilation system faulty
Temperature selector faulty
HVAC control module faulty
Temperature control actuator faulty
Blower motor faulty
Excessive compressor oil existing in A/C
system
Wiring connection faulty
Expansion valve faulty
Excessive moisture in A/C system
Magnet clutch faulty
Excessive charge of refrigerant
Air Conditioning System: Automatic Type 7B-44
Correction / Reference Item
Check related fuses and short circuit to
ground.
Check blower motor controller referring to
"Blower Motor Controller Inspection in Section
7A".
Check blower speed selector referring to
"Inspection of HVAC Control Module and its
Circuit".
Check HVAC control module referring to
"Inspection of HVAC Control Module and its
Circuit".
Check wiring and grounding.
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
Check blower motor relay referring to "Blower
Motor Relay Inspection in Section 7A".
Check amount of refrigerant charged and
system for leaks.
Check condenser referring to "Condenser
Assembly Inspection".
Check A/C evaporator and A/C evaporator
outlet temperature sensor referring to "A/C
Evaporator Inspection" and "A/C Evaporator
Outlet Air Temperature Sensor Inspection".
Check A/C evaporator outlet temperature
sensor referring to "A/C Evaporator Outlet Air
Temperature Sensor Inspection".
Check expansion valve referring to "Expansion
Valve Inspection".
Check desiccant.
Check magnetic clutch referring to
"Compressor Inspection".
Check compressor.
Replace desiccant, and perform evacuation
and charging.
Repair as necessary.
Repair as necessary.
Check temperature selector referring to
"Inspection of HVAC Control Module and its
Circuit".
Check HVAC control module referring to
"Inspection of HVAC Control Module and its
Circuit".
Check temperature control actuator.
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
Pull out excessive compressor oil in A/C
system circuit, and check compressor.
Repair as necessary.
Check expansion valve referring to "Expansion
Valve Inspection".
Replace desiccant, and perform evacuation
and charging.
Check magnetic clutch referring to
"Compressor Inspection".
Check charge of refrigerant.