problem. Check each part in order. If necessary, replace these parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
Symptom
Suspect Area
No blower operation
1. Blower fuse
2. Blower motor
3. Blower resistor
4. Blower speed control knob
5. Wire harness
No air temperature control
1. Engine coolant capacity
2. Heater control assembly
3. Temperature control knob
No compressor operation
1. Refrigerant capacity
2. A/C Fuse
3. Magnetic clutch
4. Compressor
5. A/C pressure transducer
6. A/C switch
7. Evaporator temperature sensor
8. Wire harness
No cool comes out
1. Refrigerant capacity
2. Refrigerant pressure
3. Drive belt.
4. Magnetic clutch.
5. Compressor
6. A/C pressure transducer
7. Evaporator temperature sensor.
8. A/C switch.
9. Heater control assembly
10. Wire harness
Insufficient cooling
1. Refrigerant capacity
2. Drive belt
3. Magnetic clutch
4. Compressor
5. Condenser
6. Expansion valve
7. Evaporator
8. Refrigerant lines
9. A/C pressure transducer
10. Heater control assembly
No engine idle-up when A/C switch ON
1. Engine ECM
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