Both fans do not run at low speed with the A/C on (but the A/C compressor runs with the A/C on)
Diagnostic procedure
  1. Radiator and A/C condenser fan low speed circuit troubleshooting
Also check for
  • HVAC DTCs
  • Blown fuse No. 3−6 (MAIN FAN MTR) (30 A) in the under-hood fuse/relay box
  • Faulty radiator fan relay
  • Faulty fan control relay in the relay circuit board
  • Cleanliness and tightness of all terminals