Suzuki Liana RH413, Service Manual

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7B-43 Air Conditioning System: Automatic Type
Diagnostic Information and Procedures
A/C System Symptom Diagnosis
S3RH0A7224001
4. Rear defogger relay 11. Air flow control actuator 18. ECM 25. A/C refrigerant pressure switch
5. Rear defogger 12. Temperature control actuator 19. Condenser cooling fan relay a: Lighting switch or DRL controller
6. Blower motor relay 13. Inside air temperature sensor 20. Condenser cooling fan
7. Blower motor 14. Outside air temperature sensor 21. Compressor relay
Condition Possible cause Correction / Reference Item
No cool air comes out (A/
C system does not
operate) No refrigerant Perform recover, evacuation and charging
referring to “Operation Procedure for
Refrigerant Charging”.
Fuse blown Check related fuses, and check short circuit to
ground.
A/C switch faulty Check A/C switch referring to “Inspection of
HVAC Control Module and its Circuit”.
Blower speed selector faulty Check blower speed selector referring to
“Inspection of HVAC Control Module and its
Circuit”.
A/C evaporator outlet air temperature
sensor faulty Check A/C evaporator outlet air temperature
sensor referring to “A/C Evaporator Outlet Air
Temperature Sensor Inspection”.
A/C refrigerant pressure switch faulty Check A/C refrigerant pressure switch
referring to “A/C Refrigerant Pressure Switch
Inspection”.
Wiring or grounding faulty Check wiring and grounding.
ECT sensor faulty Check ECT sensor referring to “Engine
Coolant Temperature (ECT) Sensor Inspection
in Section 1C”.
ECM and/or its circuit faulty Check ECM and/or its circuit referring to “A/C
System Inspection at ECM”.
HVAC control module and/or its circuit
faulty Check HVAC control module and/or its circuit
referring to “Inspection of HVAC Control
Module and its Circuit”.
Magnet clutch faulty Check magnet clutch referring to “Compressor
Inspection”.
Compressor drive belt loosen or broken Replace compressor drive belt.
Compressor faulty Check compressor.
Compressor relay faulty Check compressor relay referring to
“Compressor Relay and Condenser Cooling
Fan Relay Inspection”.
Temperature selector, blower speed
selector, and air flow selector faulty Check HVAC control module referring to
“Inspection of HVAC Control Module and its
Circuit”.
No cool air comes out (A/
C condenser cooling fan
motor does not operate) Fuse blown Check related fuses and short circuit to
ground.
Wiring or grounding faulty Check wiring and grounding.
Condenser cooling fan relay faulty Check condenser cooling fan relay referring to
“Compressor Relay and Condenser Cooling
Fan Relay Inspection”.
Condenser cooling fan motor faulty Check condenser cooling fan motor referring to
“Condenser Cooling Fan Inspection”.
ECM and/or its circuit faulty Check ECM and/or its circuit referring to “A/C
System Inspection at ECM”.
HVAC control module and/or its circuit
faulty Check HVAC control module and/or its circuit
referring to “Inspection of HVAC Control
Module and its Circuit”.