AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the A/C amplifier.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of A/C system do not operate | A/C control assembly | |
| A/C amplifier assembly | ||
| Harness or connector | - | |
| Air flow control: No blower operation | Blower resistor | |
| Blower w/ fan motor sub-assembly | ||
| A/C control assembly | ||
| Harness or connector | - | |
| Air flow control: No blower control | Blower resistor | |
| A/C control assembly | ||
| Harness or connector | - | |
| Air flow control: Insufficient air comes out | Blower w/ fan motor sub-assembly | |
| Blower resistor | ||
| A/C control assembly | ||
| Harness or connector | - | |
| Temperature control: No cool air comes out | Volume of refrigerant | |
| Drive belt (2TR-FE) | ||
| Drive belt (1GR-FE) | ||
| Refrigerant pressure | ||
| Magnet clutch assembly (2TR-FE) | ||
| Magnet clutch assembly (1GR-FE) | ||
| Cooler compressor assembly (2TR-FE) | ||
| Cooler compressor assembly (1GR-FE) | ||
| Magnet clutch relay*1 | ||
| A/C pressure switch | ||
| Air mix control cable | - | |
| A/C control assembly | ||
| Harness or connector | - | |
| Temperature control: Output air is warmer or cooler than set temperature or response is slow | Air mix control cable | - |
| A/C control assembly | ||
| Temperature control: No temperature control | Air mix control cable | - |
| A/C control assembly | ||
| No air inlet control | Air inlet damper control cable | - |
| A/C control assembly | ||
| No air outlet control | Mode control cable | - |
| A/C control assembly | ||
| Engine idle-up does not occur, or is continuous | Magnet clutch assembly (2TR-FE) | |
| Magnet clutch assembly (1GR-FE) | ||
| Cooler compressor assembly (2TR-FE) | ||
| Cooler compressor assembly (1GR-FE) | ||
| A/C control assembly | ||
| A/C amplifier assembly | ||
| ECM | - | |
| PTC heater does not function*1, *2 | PTC heater relay | - |
| Power heater switch assembly | - | |
| Air mix control cable | - | |
| A/C control assembly | ||
| A/C unit assembly (Max. HOT switch) | - | |
| A/C amplifier assembly | ||
| ECM | - | |
| Harness or connector | - | |
| Quick heater and accessory assembly | - |
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*1: w/ PTC heater
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*2: The PTC heater operation may be stopped when an electrical load of the entire vehicle is large.
| Symptom | Suspected Area | See page |
|---|---|---|
| Air flow control: No blower operation | Rear cooler relay | |
| Blower motor sub-assembly (rear) | ||
| Cooler control switch assembly | ||
| Harness or connector | - | |
| Air flow control: No blower control | Blower motor sub-assembly (rear) | |
| Blower (rear) resistor | ||
| Cooler control switch assembly | ||
| Harness or connector | - | |
| Temperature control: No cool air comes out | Volume of refrigerant | |
| Drive belt (2TR-FE) | ||
| Drive belt (1GR-FE) | ||
| Refrigerant pressure | ||
| Cooler compressor assembly (2TR-FE) | ||
| Cooler compressor assembly (1GR-FE) | ||
| Cooler control switch assembly | ||
| Harness or connector | - |