Problem Symptoms Table
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Use the table below to help determine the causes 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.
Air conditioning system
PROBLEM SYMPTOMS CHART
| Symptom | Suspected area |
|---|---|
| No functions of A/C system operate | A/C Fuse |
| Wire harness or connector | |
| AIR CONDITIONING AMPLIFIER | |
| Airflow Control: blower motor does not operate | HTR, GAUGE Fuse |
| BLOWER MOTOR CIRCUIT | |
| Wire harness or connector | |
| Airflow Control: blower motor does not change speed | BLOWER RESISTOR |
| BLOWER MOTOR | |
| HEATER CONTROL (FOR HATCHBACK) | |
| HEATER CONTROL (FOR SEDAN) | |
| Temperature Control: No cool air comes out | REFRIGERANT VOLUME |
| REFRIGERANT PRESSURE | |
| HEATER CONTROL BASE (FOR HATCHBACK) | |
| HEATER CONTROL BASE (FOR SEDAN) | |
| AIR CONDITIONING PRESSURE SENSOR | |
| COMPRESSOR AND PULLEY | |
| Expansion valve | |
| AIR CONDITIONING AMPLIFIER | |
| ECM | |
| CAN communication | |
| Compressor and pulley do not operate | A/C Fuse |
| REFRIGERANT PRESSURE | |
| COMPRESSOR AND PULLEY | |
| AIR CONDITIONING PRESSURE SENSOR | |
| EVAPORATOR TEMPERATURE SENSOR (FOR HATCHBACK) | |
| EVAPORATOR TEMPERATURE SENSOR (FOR SEDAN) | |
| AIR CONDITIONING AMPLIFIER | |
| ECM (See TERMINALS OF ECM ) | |
| CAN communication (See HOW TO PROCEED WITH TROUBLESHOOTING ) |