Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
- If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the A/C amplifier.
Air conditioning system
PROBLEM SYMPTOMS
| Symptom | Suspected Area | See |
|---|---|---|
| No Cool Air Comes Out: Compressor Not Operating | Volume of refrigerant | REFRIGERANT |
| Pressure switch | PRESSURE SWITCH | |
| Magnetic clutch | COMPRESSOR AND MAGNETIC CLUTCH | |
| Air conditioning amplifier assembly | AIR CONDITIONING SYSTEM | |
| Compressor pick up sensor | COMPRESSOR AND MAGNETIC CLUTCH | |
| Cooler compressor | COMPRESSOR AND MAGNETIC CLUTCH | |
| Wire harness or connector | - | |
| No Cool Air Comes Out: Blower Not Operating | HTR fuse | - |
| Heater relay | HEATER BLOWER MOTOR RELAY | |
| Blower resistor | BLOWER RESISTOR | |
| Blower motor | BLOWER MOTOR | |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Air conditioning amplifier assembly | AIR CONDITIONING SYSTEM | |
| Wire harness or connector | - | |
| No Cool Air Comes Out: Air Mix Damper Servo Not Operating | Air mix control servo motor | INSPECTION |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Wire harness or connector | - | |
| No Cool Air Comes Out: Insufficient Cooling | Volume of refrigerant | REFRIGERANT |
| Blower motor performance check | BLOWER MOTOR | |
| Air mix damper servo full travel check | INSPECTION | |
| Recirculation damper servo operation check | INSPECTION | |
| No Engine Idle-up when A/C Switch ON | Air conditioning amplifier assembly | AIR CONDITIONING SYSTEM |
| Idling control system | DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION | |
| Wire harness or connector | - | |
| No Warm Air Comes Out: Blower Not Operating | HTR fuse | - |
| IG1 fuse | - | |
| Heater relay | HEATER BLOWER MOTOR RELAY | |
| Blower resistor | BLOWER RESISTOR | |
| Blower motor | BLOWER MOTOR | |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Wire harness or connector | - | |
| No Warm Air Comes Out: Air Mix Damper Servo Not Operating | Air mix control servo motor | INSPECTION |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Wire harness or connector | - | |
| No Warm Air Comes Out: Insufficient Cooling | Volume of engine coolant | REPLACEMENT |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Blower motor performance check | BLOWER MOTOR | |
| Air mix damper servo full travel check | INSPECTION | |
| Recirculation damper servo operation check | INSPECTION | |
| Heater radiator | - | |
| Air Not Coming From Desired Outlets: Blower Not Operating | HTR fuse | - |
| IG1 fuse | - | |
| Heater relay | HEATER BLOWER MOTOR RELAY | |
| Blower resistor | BLOWER RESISTOR | |
| Blower motor | BLOWER MOTOR | |
| Air conditioning panel assembly | HEATER BLOWER MOTOR RELAY | |
| Wire harness or connector | - | |
| Air Not Coming From Desired Outlets: Air Mix Damper Servo Not Operating | Air mix control servo motor | INSPECTION |
| Wire harness or connector | - | |
| Windshield Fogging: Compressor Not Operating | IG1 fuse | - |
| Volume of refrigerant | REFRIGERANT | |
| Magnetic clutch | COMPRESSOR AND MAGNETIC CLUTCH | |
| Cooler thermistor sensor | INSPECTION | |
| Air conditioning amplifier assembly | AIR CONDITIONING SYSTEM | |
| Compressor pick up sensor | COMPRESSOR AND MAGNETIC CLUTCH | |
| Cooler compressor | COMPRESSOR AND MAGNETIC CLUTCH | |
| Wire harness or connector | - | |
| Windshield Fogging: Blower Not Operating | HTR fuse | - |
| Heater relay | HEATER BLOWER MOTOR RELAY | |
| Blower resistor | BLOWER RESISTOR | |
| Blower motor | BLOWER MOTOR | |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Wire harness or connector | - | |
| Windshield Fogging: Air Mix Damper Servo Not Operating | Air mix control servo motor | INSPECTION |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL | |
| Wire harness or connector | - | |
| Windshield Fogging: Insufficient Cooling | Volume of refrigerant | REFRIGERANT |
| Blower motor performance check | BLOWER MOTOR | |
| Air mix damper servo full travel check | INSPECTION | |
| Recirculation damper servo operation check | INSPECTION | |
| Defrosting Insufficient: | Blower motor | BLOWER MOTOR |
| Mode doors: Check cooling, heating & door operation | - | |
| Mode control servo motor: Hot air not coming, Go to no warm air comes out | - | |
| Mode control servo motor: Cold air not coming, Go to no cold air comes out | - | |
| Noise: | Blower motor: Inspect blower motor for debris/cracks | - |
| Fresh air intake area: Inspect fresh air intake area for debris | - | |
| Noise: | Cooler compressor: Cooler compressor incorrectly fitted | COMPRESSOR AND MAGNETIC CLUTCH |
| Magnetic clutch | COMPRESSOR AND MAGNETIC CLUTCH | |
| Refrigerant charge amount | REFRIGERANT LINE | |
| Compressor mounting bracket: Compressor mounting bracket incorrectly fitted | INSTALLATION | |
| A/C lines secure & not grounded | - | |
| Odor (Cycle through blower speed, mode, temperature to define odor type when engine is running and A/C switch is ON. (Musty smell, coolant oil smell)) | Wet carpet: Inspect for water, engine coolant or oil leaks | - |
| A/C drain tube: Inspect for water, engine coolant or oil leaks | - | |
| Fresh air intake area: Inspect for water, engine coolant or oil leaks | - | |
| Heater hose: Inspect for water, engine coolant or oil leaks | - | |
| Evaporator: Inspect for water, engine coolant or oil leaks | - | |
| Evapo case: Inspect for water, engine coolant or oil leaks | - | |
| Air Not Coming from Desired Outlets (Cycle the mode lever and check airflow for outlets when engine is running, A/C switch is ON.) | Blower motor | BLOWER MOTOR |
| Mode control servo motor | INSPECTION | |
| Mode doors: Check cooling, heating & door operation | - | |
| Wire harness or connector | - | |
| Air conditioning panel assembly | INTEGRATION CONTROL AND PANEL |