AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) > PROBLEM SYMPTOMS TABLE |
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- HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
Symptom | Suspected Area | See page |
All functions of the A/C system do not operate. | IG power source circuit |
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Back-up power source circuit |
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| |
A/C amplifier |
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| |
Air Flow Control: No blower operation | Blower motor circuit |
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|
A/C amplifier |
Click here
| |
Air Flow Control: No blower control | Blower motor circuit |
Click here
|
A/C amplifier |
Click here
| |
Air Flow Control: Insufficient air flow | Blower motor circuit |
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|
A/C amplifier |
Click here
| |
Temperature Control: No cool air comes out. | Refrigerant volume | - |
Refrigerant pressure |
Click here
| |
Pressure sensor circuit |
Click here
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Air flow circuit (for 2ZR-FE) |
Click here
| |
Compressor solenoid circuit |
Click here
| |
Evaporator temperature sensor circuit |
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| |
Ambient temperature sensor circuit |
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| |
Heater control switch circuit |
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| |
Air mix damper control cable |
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| |
Expansion valve |
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| |
A/C amplifier |
Click here
| |
Temperature Control: No warm air comes out. | Evaporator temperature sensor circuit |
Click here
|
Ambient temperature sensor circuit |
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| |
Generator signal circuit*1 |
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Headlight signal circuit*1 |
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PTC heater circuit*1 |
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| |
Engine coolant temperature sensor circuit (for 2AZ-FE) |
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Engine coolant temperature sensor circuit (for 2ZR-FE) |
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| |
CAN communication system |
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Air mix damper control cable |
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| |
A/C amplifier |
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| |
ECM (for 2AZ-FE) |
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ECM (for 2ZR-FE) |
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| |
Temperature Control: Output air is warmer or cooler than the set temperature or response is slow. | Refrigerant volume | - |
Refrigerant pressure |
Click here
| |
Ambient temperature sensor circuit |
Click here
| |
Generator signal circuit*1 |
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| |
Headlight signal circuit*1 |
Click here
| |
PTC heater circuit*1 |
Click here
| |
Engine coolant temperature sensor circuit (for 2AZ-FE) |
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| |
Engine coolant temperature sensor circuit (for 2ZR-FE) |
Click here
| |
CAN communication system |
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| |
Air mix damper control cable |
Click here
| |
Radiator unit sub-assembly |
Click here
| |
Expansion valve |
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| |
A/C amplifier |
Click here
| |
ECM (for 2AZ-FE) |
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| |
ECM (for 2ZR-FE) |
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| |
Temperature Control: No temperature control (only Max. cool or Max. hot) | Ambient temperature sensor circuit |
Click here
|
Evaporator temperature sensor circuit |
Click here
| |
Heater control switch circuit |
Click here
| |
Generator signal circuit*1 |
Click here
| |
Headlight signal circuit*1 |
Click here
| |
PTC heater circuit*1 |
Click here
| |
Engine coolant temperature sensor circuit (for 2AZ-FE) |
Click here
| |
Engine coolant temperature sensor circuit (for 2ZR-FE) |
Click here
| |
CAN communication system |
Click here
| |
Air mix damper control cable |
Click here
| |
A/C amplifier |
Click here
| |
ECM (for 2AZ-FE) |
Click here
| |
ECM (for 2ZR-FE) |
Click here
| |
No air inlet control | Recirculation damper servo motor circuit |
Click here
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A/C amplifier |
Click here
| |
No air flow mode control | No. 2 heater control cable |
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Engine idle up does not occur, or is continuous. | Compressor solenoid circuit |
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A/C amplifier |
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| |
ECM (for 2AZ-FE) |
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| |
ECM (for 2ZR-FE) |
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| |
CAN communication system |
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| |
A/C indicator blinks. | Compressor solenoid circuit |
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|
A/C amplifier |
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| |
Diagnostic trouble codes are not recorded. Set mode is cleared when ignition switch is turned off. | Back-up power source circuit |
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|
A/C amplifier |
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