Troubleshooting

TROUBLESHOOTING

DIAGNOSTIC SYMPTOM TABLE

Before replacing or repairing air conditioning system components, first determine whether the malfunction is caused by refrigerant charge, airflow, or the compressor. Use the table below to determine the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these components. After repairing the malfunction, check the entire system to make sure it operates correctly. STANDARD]

Symptom	Suspected Area
Fan Does Not Operate	1. Blower Fuse
	2. Blower Relay
	3. Blower Motor
	4. Power Mosfet
	5. Radiator Control Unit
	6. Fan Control Switch Malfunction
	7. Wiring Harness
Air Temperature Cannot Be Adjusted	1. Engine Coolant Reservoir
	2. Temperature Switch
	3. Radiator Control Unit
Compressor Does Not Operate	1. Cooling Capacity
	2. Air Conditioner Fuse
	3. Compressor
	4. A/C Pressure Sensor
	5. A/C Switch
	6. Radiator Control Unit
	7. Evaporator Temperature Sensor
	8. Wiring Harness
Air Not Cold Enough	1. Cooling Capacity
	2. Refrigerant Pressure
	3. Drive Belt
	4. Compressor
	5. A/C Pressure Sensor
	6. Evaporator Temperature Sensor
	7. A/C Switch
	8. Radiator Control Unit
	9. Wiring Harness
Insufficient Cooling	1. Cooling Capacity
	2. Drive Belt
	3. Compressor
	4. Condenser
	5. Expansion Valve
	6. Evaporator
	7. Refrigerant Lines
	8. Air Conditioner Pressure Sensor
	9. Radiator Control Unit
Engine Does Not Idle Well with A/C On	1. Engine ECU
	2. Radiator Control Unit
	3. Wiring Harness
No Air Flow Adjustment	1. Recirculation and Fresh Air Switch
	2. Radiator Control Unit
No Mode Command	1. Radiator Control Unit
	2. Temperature Switch
	3. Mode Actuator
Cooling Fan Does Not Operate	1. Cooling Fan Fuse
	2. Blower Motor
	3. Engine ECU
	4. Wiring Harness