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Heating Symptom Troubleshooting

Symptom
Diagnostic procedure
Also check for
Blower motor runs, but one or more speeds are inoperative
Cleanliness and tightness of all connectors
Blower motor does not run at all
  • Blown fuse No. 10 (7.5 A) and No. 57 (30 A) in the under-dash fuse/relay box
  • Poor ground at G501
  • Cleanliness and tightness of all connectors
Recirculation control doors do not change between Fresh and Recirculate
  • Blown fuse No. 10 (7.5 A) in the under-dash fuse/relay box
  • Cleanliness and tightness of all connectors
Heater Control do not work
  • Blown fuse No. 10 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G502
  • Cleanliness and tightness of all connectors