Diagnostic Information And Procedures; A/C System Symptom Diagnosis - Suzuki Swift Sport 2004 Service & Repair Manual

A/C System Symptom Diagnosis

Condition
No cool air comes out (A/
C system does not
operate)
No cool air comes out
(radiator cooling fan
motor does not operate)
No cool air comes out
(blower motor does not
operate)

Diagnostic Information and Procedures

Possible cause
No refrigerant
Fuse blown
A/C switch faulty
Blower speed selector faulty
Evaporator thermistor (Evaporator
temperature sensor) faulty
A/C refrigerant pressure sensor faulty
Wiring or grounding faulty
ECM faulty
Magnet clutch faulty
Compressor drive belt loosened or
broken
Compressor faulty
Compressor relay faulty
BCM faulty
Fuse blown
Wiring or grounding faulty
Radiator cooling fan motor relay faulty
Radiator cooling fan motor faulty
ECM and/or its circuit faulty
Fuse blown
Blower motor relay faulty
Blower motor resistor faulty
Blower speed selector faulty
Wiring or grounding faulty
Blower motor faulty
Air Conditioning System: Manual Type 7B-7
Correction / Reference Item
Perform recovery, evacuation and charge
referring to "Operation Procedure for
Refrigerant Charge".
Check related fuses, and then check for short
circuit to ground.
Check A/C switch referring to "A/C Switch
Inspection".
Check blower speed selector referring to
"Blower Speed Selector Inspection in Section
7A".
Check evaporator thermistor (evaporator
temperature sensor) referring to "Evaporator
Thermistor (Evaporator Temperature Sensor)
Inspection".
Check A/C refrigerant pressure sensor
referring to "A/C Refrigerant Pressure Sensor
and Its Circuit Inspection".
Repair as necessary.
Check ECM referring to "A/C System
Inspection at ECM".
Check magnet clutch referring to "Magnet
Clutch Inspection".
Adjust or replace drive belt.
Check compressor.
Check compressor relay referring to
"Compressor Relay Inspection".
Check BCM referring to "Inspection of BCM
and its Circuits in Section 10B".
Check related fuses, and then check for short
circuit to ground.
Repair as necessary.
Check radiator cooling fan motor relay
referring to "Radiator Cooling Fan Relay
Inspection in Section 1F".
Check radiator cooling fan motor referring to
"Radiator Cooling Fan Removal and
Installation in Section 1F".
Check ECM and/or its circuit referring to "A/C
System Inspection at ECM".
Check related fuses, and then check for short
circuit to ground.
Check blower motor relay referring to "Blower
Motor Relay Inspection in Section 7A".
Check blower motor resistor referring to
"Blower Motor Resistor Inspection in Section
7A".
Check blower speed selector referring to
"Blower Speed Selector Inspection in Section
7A".
Repair as necessary.
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
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