A/C System Symptom Diagnosis - Suzuki GRAND VITARA Owner's 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)
Possible cause
No refrigerant
Fuse blown
Evaporator temperature sensor faulty
A/C refrigerant pressure sensor faulty
Wiring or grounding faulty
ECT sensor faulty
ECM faulty
HVAC control module faulty
Magnet clutch faulty
Compressor drive belt loosened or
broken
Compressor faulty
Compressor relay faulty
Temperature selector, blower speed
selector, and/or air flow selector faulty
BCM faulty
Fuse blown
Wiring or grounding faulty
Radiator cooling fan motor relay faulty
Radiator cooling fan motor faulty
ECM faulty
HVAC control module faulty
Air Conditioning System:
Correction / Reference Item
Perform recovery, evacuation and charge
referring to "Operation Procedure for Charging
A/C with Refrigerant: ".
Check related fuses, and then check for short
circuit to ground.
Check evaporator temperature sensor
referring to "A/C 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 ECT sensor referring to "Engine
Coolant Temperature (ECT) Sensor
Inspection: in Section 1C".
Check ECM referring to "A/C System
Inspection at ECM: ".
Check HVAC control module referring to
"HVAC Control Module and Its Circuits
Inspection: ".
Check magnet clutch referring to "Magnet
Clutch Operating Check for M16 Engine
Model: " or "Magnet Clutch Operating Check
for J20 Engine Model: ".
Adjust or replace drive belt.
Check compressor.
Check compressor relay referring to "A/C
Compressor Relay Inspection: ".
Check HVAC control module referring to
"HVAC Control Module and Its Circuits
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 Motor On-Vehicle
Inspection: in Section 1F".
Check ECM referring to "A/C System
Inspection at ECM: ".
Check HVAC control module referring to
"HVAC Control Module and Its Circuits
Inspection: ".
7B-26
S5JB0A7204001