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)
Diagnostic procedure
  1. A/C pressure sensor troubleshooting: A/C pressure sensor circuit low voltage, R20A3 engine model, K24Z3 engine model, A/C pressure sensor circuit high voltage, R20A3 engine model, K24Z3 engine model
Also check for
  • Powertrain DTCs, R20A3 engine model, K24Z3 engine model
  • Cleanliness and tightness of all terminals