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Problem Symptoms Table

WARNING: This page is about a different car, the 2002 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.

PROBLEM SYMPTOMS TABLE - AIR CONDITIONING SYSTEM

Symptom Suspect Area
Whole functions of the A/C system does not operate.
  1. HTR fuse (50 A)
  2. HTR fuse (10 A)
  3. A/C control assy
  4. Wire harness or connector
Air Flow Control: No blower operation
  1. Heater Blower motor relay
  2. Blower w/fan motor sub-assy
  3. A/C control assy
  4. Wire harness or connector
Air Flow Control: No blower control
  1. Blower w/fan motor sub-assy
  2. Blower resistor
  3. A/C control assy
  4. Wire harness or connector
Air Flow Control: Insufficient air out
  1. Blower w/fan motor sub-assy
  2. A/C control assy
  3. Wire harness or connector
Temperature Control: No cool air comes out
  1. Volume of refrigerant
  2. Drive belt tension
  3. Refrigerant pressure
  4. Cooler compressor assy
  5. Pressure switch No. 1
  6. Air mix damper servo sub-assy
  7. Condenser fan
  8. A/C control assy
  9. Wire harness or connector
Temperature Control: No warm air comes out
  1. Engine coolant volume
  2. Air mix damper servo sub-assy
  3. Cooler thermistor No. 1
  4. A/C control assy
  5. Heater radiator unit sub-assy
  6. Wire harness or connector
Temperature Control: Output air is warmer or cooler than the set temperature or response is slow.
  1. Air mix damper servo sub-assy
  2. A/C control assy
  3. Wire harness or connector
Temperature Control: No temperature control (only Max. cool or Max. warm)
  1. Air mix damper servo sub-assy
  2. A/C control assy
  3. Wire harness or connector
No air inlet control
  1. Blower damper servo sub-assy
  2. A/C control assy
  3. Wire harness or connector
No air outlet control
  1. Mode damper servo sub-assy
  2. A/C control assy
  3. Wire harness or connector
No engine idle-up when A/C switch ON
  1. Cooler compressor assy
  2. A/C control assy
  3. ECM
  4. Wire harness or connector
Brightness does not changes when rheostat volume or light control switch it turned.
  1. Illumination light system
  2. A/C control assy
  3. Wire harness or connector
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