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 causes of the problem symptom. If multiple suspected areas are listed, the potential cases 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.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of the A/C system do not operate. | IG power source circuit | |
| Air conditioning amplifier | ||
| Air Flow Control: No blower operation. | Blower motor circuit | |
| Air conditioning amplifier | ||
| Air Flow Control: No blower control. | Blower motor circuit | |
| Air conditioning amplifier | ||
| Air Flow Control: Insufficient air flow. | Blower motor circuit | |
| Air conditioning amplifier | ||
| Temperature Control: No cool air comes out. | Refrigerant volume | |
| Refrigerant pressure | ||
| Air conditioning pressure sensor | ||
| Compressor solenoid circuit | ||
| Air Conditioning Compressor (for 1KR-FE) | ||
| Air Conditioning Compressor (for 1NR-FE) | ||
| Air Conditioning Compressor (for 1ND-TV) | ||
| Evaporator temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Heater control switch circuit | ||
| Air mix damper control cable | ||
| Expansion valve | ||
| Air conditioning amplifier | ||
| ECM (for 1KR-FE) | ||
| ECM (for 1NR-FE) | ||
| ECM (for 1ND-TV) | ||
| Temperature Control: No warm air comes out. | Evaporator temperature sensor circuit | |
| Ambient temperature sensor circuit | ||
| Engine coolant temperature sensor circuit (for 1KR-FE) | ||
| Engine coolant temperature sensor circuit (for 1NR-FE) | ||
| Engine coolant temperature sensor circuit (for 1ND-TV) | ||
| PTC heater circuit* | ||
| Headlight signal circuit* | ||
| Generator signal circuit* | ||
| No. 3 heater control (Max hot switch)* | ||
| Air mix damper control cable | ||
| Air conditioning amplifier | ||
| ECM (for 1KR-FE) | ||
| ECM (for 1NR-FE) | ||
| ECM (for 1ND-TV) | ||
| CAN communication system | ||
| Temperature Control: Output air is warmer or cooler than the set temperature or response is slow. | Refrigerant volume | |
| Refrigerant pressure | ||
| Ambient temperature sensor circuit | ||
| Engine coolant temperature sensor circuit (for 1KR-FE) | ||
| Engine coolant temperature sensor circuit (for 1NR-FE) | ||
| Engine coolant temperature sensor circuit (for 1ND-TV) | ||
| Air mix damper control cable | ||
| Radiator unit sub-assembly | ||
| Expansion valve | ||
| Air conditioning amplifier | ||
| ECM (for 1KR-FE) | ||
| ECM (for 1NR-FE) | ||
| ECM (for 1ND-TV) | ||
| CAN communication system | ||
| Temperature Control: No temperature control (only Max. cool or Max. hot). | Ambient temperature sensor circuit | |
| Evaporator temperature sensor circuit | ||
| Heater control switch circuit | ||
| Engine coolant temperature sensor circuit (for 1KR-FE) | ||
| Engine coolant temperature sensor circuit (for 1NR-FE) | ||
| Engine coolant temperature sensor circuit (for 1ND-TV) | ||
| Air mix damper control cable | ||
| Air conditioning amplifier | ||
| ECM (for 1KR-FE) | ||
| ECM (for 1NR-FE) | ||
| ECM (for 1ND-TV) | ||
| CAN communication system | ||
| No air inlet control. | Air inlet damper control cable | |
| No air flow mode control. | Defroster damper control cable | |
| Engine idle speed increase does not occur, or is continuous. | Compressor solenoid circuit | |
| Air conditioning amplifier | ||
| ECM (for 1KR-FE) | ||
| ECM (for 1NR-FE) | ||
| ECM (for 1ND-TV) | ||
| CAN communication system | ||
| A/C indicator blinking. | Compressor solenoid circuit | |
| Air conditioning amplifier | ||
| Cooling fan motor does not operate. | Cooling fan system (for 1KR-FE) | |
| Cooling fan system (for 1NR-FE) | ||
| Cooling fan system (for 1ND-TV) | ||
| Air conditioning amplifier | ||
| Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch turned off. | Air conditioning amplifier |
*: w/ PTC Heater