Climate Control Symptom Troubleshooting

Symptom Diagnostic procedure Also check for 
The blower motor does not run immediately even th ough the engine is fully warmed up
NOTE: The temperature control dial must be set between 18°C (64°F) and 32°C (90°F) 
ECT Sensor Circuit Troubleshooting Cleanliness and tightness of all connectors 
Both heater and A/C do not work Climate Control Power and Ground Circuits Troubleshooting 
  • Blown fuse No. 22 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G402
  • Cleanliness and tightness of all connectors
 
Condenser fan does not run at all (but radiator fan runs with the A/C on) Condenser Fan Circuit Troubleshooting 
  • Blown fuse No. 11 (30A) in the under-hood fuse/relay box, and No. 22 (7.5A) in the under-dash fuse/relay box
  • Poor ground at G301
  • Cleanliness and tightness of all connectors
 
Both fans do not run with the A/C on Radiator and Condenser Fans Common Circuit Troubleshooting 
  • Blown fuse No. 10 (20A) and No. in the under-hood fuse/relay box, and No. 11 (30A) in the under-dash fuse/relay box
  • Poor ground at G301
  • Cleanliness and tightness of all connectors
 
Compressor clutch does not engage Compressor Clutch Circuit Troubleshooting 
  • Blown fuse No. 11 (30A) in the under-hood fuse/relay box, and No. 22 (7.5A) in the under-dash fuse/relay box
  • Cleanliness and tightness of all connectors
 
A/C System does not come on (both fans and compressor) A/C Pressure Switch Circuit Troubleshooting Cleanliness and tightness of all connectors