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Home >> Mazda >> 2021 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> Engine Control System Operation Inspection >> A/C Cut-off Control System Inspection
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A/C Cut-off Control System Inspection

  1. Start the engine.
  2. Turn the A/C switch on.
  3. Verify that the A/C compressor magnetic clutch actuates.
  4. Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2-5 s.
    • If it actuates, inspect the following:
      • A/C relay (See RELAY INSPECTION .)
      • Open or short to ground in wiring harness and connectors (IG1 relay-A/C relay-PCM terminal 2BB)
      • A/C related parts
      • APP 1, APP 2 PIDs (See PCM INSPECTION .)