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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

Symptom Diagnostic procedure Also check for
Mode control motor does not run, or one or more modes do not work Mode control motor circuit troubleshooting (see MODE CONTROL MOTOR CIRCUIT TROUBLESHOOTING )
Recirculation control doors do not change between Fresh and Recirculate Recirculation control motor circuit troubleshooting (see RECIRCULATION CONTROL MOTOR CIRCUIT TROUBLESHOOTING )
Blower, heater controls, and A/C do not work Climate control power and ground circuit troubleshooting (see CLIMATE CONTROL POWER AND GROUND CIRCUIT TROUBLESHOOTING )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION )
  • Blown fuse No. 16 (30 A) in the under-hood fuse/relay box, and No. 16 (7.5 A) and No. 18 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G404
  • Cleanliness and tightness of all connectors
Both fans do not run at low speed with the A/C on (but the A/C compressor runs with the A/C on) Radiator and A/C condenser fan low speed circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN LOW SPEED CIRCUIT TROUBLESHOOTING )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION )
  • Blown fuse No. 19 (20 A) in the under-hood fuse/relay box, and No. 16 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G301
  • Cleanliness and tightness of all connectors
The A/C condenser fan does not run at high speed (but both fans run at low speed and the A/C compressor operates with the A/C on) A/C condenser fan high speed circuit troubleshooting (see A/C CONDENSER FAN HIGH SPEED CIRCUIT TROUBLESHOOTING )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION )
  • Blown fuse No. 16 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G301
  • Cleanliness and tightness of all connectors
Both fans do not run at high speed with the A/C on (but both fans run at low speed and the A/C compressor operates with the A/C on) Radiator and A/C condenser fan high speed circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN HIGH SPEED CIRCUIT TROUBLESHOOTING )
The A/C compressor clutch does not engage (but both fans run with the A/C on) A/C compressor clutch circuit troubleshooting (see A/C COMPRESSOR CLUTCH CIRCUIT TROUBLESHOOTING )
  • HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION )
  • Blown fuse No. 19 (20 A) in the under-hood fuse/relay box, and No. 16 (7.5 A) in the under-dash fuse/relay box
  • Cleanliness and tightness of all connectors
A/C system does not come on (both fans and the A/C compressor do not work); heater is OK A/C pressure switch and evaporator temperature sensor circuit troubleshooting (see A/C PRESSURE SWITCH AND EVAPORATOR TEMPERATURE SENSOR CIRCUIT TROUBLESHOOTING )
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