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Problem Symptoms Table

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS TABLE - AIR CONDITIONING SYSTEM

Symptom Suspected Area
Entire A/C system does not operate
  1. IG power source circuit
  2. A/C amplifier assy
Air Flow Control: No blower operation
  1. Blower motor controller
  2. Blower w/fan motor sub-assy
  3. A/C amplifier assy
Air Flow Control: No blower control
  1. Blower motor controller
  2. Blower w/fan motor sub-assy
  3. A/C amplifier assy
Air Flow Control: Insufficient air output
  1. Blower motor controller
  2. Blower w/fan motor sub-assy
  3. A/C amplifier assy
Temperature Control: No cool air comes out
  1. Volume of refrigerant
  2. Drive belt tension
  3. Refrigerant pressure
  4. Compressor circuit
  5. Compressor lock sensor circuit
  6. Pressure switch circuit
  7. Air mix damper control servomotor circuit
  8. Air mix damper position sensor circuit
  9. Room temperature sensor circuit
  10. Ambient temperature sensor circuit
  11. A/C amplifier assy
Temperature Control: No warm air comes out
  1. Air mix damper control servomotor circuit
  2. Air mix damper position sensor circuit
  3. Ambient temperature sensor circuit
  4. Room temperature sensor circuit
  5. Evaporator temperature sensor circuit
  6. A/C amplifier assy
  7. Heater radiator
Temperature Control: Output air is warmer or cooler than set temperature or response is slow
  1. Room temperature sensor circuit
  2. Ambient temperature sensor circuit
  3. Solar sensor circuit
  4. Air mix damper control servomotor circuit
  5. Air mix damper position sensor circuit
  6. A/C amplifier assy
Temperature Control: No temperature control (only Max. cool or Max. warm)
  1. Air mix damper control servomotor circuit
  2. Air mix damper position sensor circuit
  3. A/C amplifier assy
No air inlet control
  1. Air inlet damper control servomotor circuit
  2. Air inlet damper position sensor circuit
  3. A/C amplifier assy
No air outlet control
  1. Air outlet damper control servomotor circuit
  2. Air outlet damper position sensor circuit
  3. A/C amplifier assy
Engine idle up does not occur, or is continuous
  1. Compressor circuit
  2. Compressor lock sensor circuit
  3. A/C amplifier assy
Displayed set temperature value does not match up with operation of temperature control switch
  1. A/C amplifier assy
Brightness does not change when rheostat volume or light control switch is adjusted
  1. Combination meter (Rheostat)
  2. Illumination circuit
  3. A/C amplifier assy
Unable to access the diagnosis mode
  1. A/C amplifier assy
DTCs are not recorded. Set mode is cleared when IG switch is turned off
  1. Back-up power source circuit
  2. A/C amplifier assy
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