Suzuki Liana RH413, Service Manual

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7B-7 Air Conditioning System: Manual Type
Diagnostic Information and Procedures
A/C System Symptom Diagnosis
S3RH0A7214001
5. Rear defogger 11. Air flow control actuator 17. A/C refrigerant pressure switch
6. Blower motor relay 12. Temperature control actuator 18. Condenser cooling fan 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 short circuit to ground.
A/C switch faulty Check HVAC control module and its circuit
referring to “Inspection of HVAC Control
Module and its Circuit”.
Blower speed selector, temperature
selector, and air flow selector faulty Check HVAC control module and its circuit
referring to “Inspection of HVAC Control
Module and its Circuit”.
A/C evaporator inlet and/or outlet air
temperature sensor faulty Check A/C evaporator inlet and/or outlet air
temperature sensor referring to “A/C
Evaporator Inlet and Outlet Air Temperature
Sensors 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 9C”.
ECM and/or its circuit faulty Check ECM and/or its circuit referring to “A/C
System Inspection at ECM”.
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”.
HVAC control module and/or its circuit
faulty Check HVAC control module and its circuit
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”.