Troubleshooting

Troubleshooting

Symptom Table

Before replacing or repairing air conditioning components, first determine whether the malfunction is caused by low refrigerant, airflow, or the compressor. Use the following table to find the cause of the problem. The numbers indicate the order of probable causes. Check each part in order. Replace the relevant parts if necessary. After repairing the malfunction, check the entire system to make sure it operates satisfactorily. Standard:

Symptom	Suspected Area
No Fan Operation	1. Blower Fuse
	2. Blower Motor
	3. PWM Blower Module
	4. Blower Speed Switch
	5. Wire Harness
No Air Temperature Control	1. Engine Coolant Reservoir
	2. Heater Control Unit
Compressor Does Not Operate	1. Cooling Capacity
	2. A/C Fuse
	3. Restriction Clutch
	4. Compressor
	5. A/C Pressure Sensor
	6. A/C Switch
	7. Evaporator Temperature Sensor
	8. Wiring Harness
Vent Air Not Cold	1. Cooling Capacity
	2. Refrigerant Pressure
	3. Drive Belt
	4. Restriction Clutch
	5. Compressor
	6. A/C Pressure Sensor
	7. Evaporator Temperature Sensor
	8. A/C Switch
	9. Heater Control Unit
	10. Wire Harness
Insufficient Cooling	1. Cooling Capacity
	2. Drive Belt
	3. Restriction Clutch
	4. Compressor
	5. Condenser
	6. Expansion Valve
	7. Evaporator
	8. Refrigerant Lines
	9. A/C Pressure Sensor
	10. Heater Control Unit
Engine Does Not Idle Well with A/C On	1. Compressor
	2. Wiring Harness
No Air Flow Control	1. Heater Control Unit
No Mode Control	1. Heater Control Unit
Cooling Fan Does Not Operate	1. Cooling Fan Fuse
	2. Blower Motor
	3. Engine ECM
	4. Wiring Harness