Diagnostic Information And Procedures; A/C System Symptom Diagnosis - Suzuki Liana RH413 Service Manual

7B-43 Air Conditioning System: Automatic Type
4. Rear defogger relay
5. Rear defogger
6. Blower motor relay
7. Blower motor

A/C System Symptom Diagnosis

Condition
No cool air comes out (A/
C system does not
operate)
No cool air comes out (A/
C condenser cooling fan
motor does not operate)
11. Air flow control actuator
12. Temperature control actuator
13. Inside air temperature sensor
14. Outside air temperature sensor

Diagnostic Information and Procedures

Possible cause
No refrigerant
Fuse blown
A/C switch faulty
Blower speed selector faulty
A/C evaporator outlet air temperature
sensor faulty
A/C refrigerant pressure switch faulty
Wiring or grounding faulty
ECT sensor faulty
ECM and/or its circuit faulty
HVAC control module and/or its circuit
faulty
Magnet clutch faulty
Compressor drive belt loosen or broken Replace compressor drive belt.
Compressor faulty
Compressor relay faulty
Temperature selector, blower speed
selector, and air flow selector faulty
Fuse blown
Wiring or grounding faulty
Condenser cooling fan relay faulty
Condenser cooling fan motor faulty
ECM and/or its circuit faulty
HVAC control module and/or its circuit
faulty
18. ECM
19. Condenser cooling fan relay
20. Condenser cooling fan
21. Compressor relay
Correction / Reference Item
Perform recover, evacuation and charging
referring to "Operation Procedure for
Refrigerant Charging".
Check related fuses, and check short circuit to
ground.
Check A/C switch referring to "Inspection of
HVAC Control Module and its Circuit".
Check blower speed selector referring to
"Inspection of HVAC Control Module and its
Circuit".
Check A/C evaporator outlet air temperature
sensor referring to "A/C Evaporator Outlet Air
Temperature Sensor Inspection".
Check A/C refrigerant pressure switch
referring to "A/C Refrigerant Pressure Switch
Inspection".
Check wiring and grounding.
Check ECT sensor referring to "Engine
Coolant Temperature (ECT) Sensor Inspection
in Section 1C".
Check ECM and/or its circuit referring to "A/C
System Inspection at ECM".
Check HVAC control module and/or its circuit
referring to "Inspection of HVAC Control
Module and its Circuit".
Check magnet clutch referring to "Compressor
Inspection".
Check compressor.
Check compressor relay referring to
"Compressor Relay and Condenser Cooling
Fan Relay Inspection".
Check HVAC control module referring to
"Inspection of HVAC Control Module and its
Circuit".
Check related fuses and short circuit to
ground.
Check wiring and grounding.
Check condenser cooling fan relay referring to
"Compressor Relay and Condenser Cooling
Fan Relay Inspection".
Check condenser cooling fan motor referring to
"Condenser Cooling Fan Inspection".
Check ECM and/or its circuit referring to "A/C
System Inspection at ECM".
Check HVAC control module and/or its circuit
referring to "Inspection of HVAC Control
Module and its Circuit".
25. A/C refrigerant pressure switch
a: Lighting switch or DRL controller
S3RH0A7224001