2020 Mazda CX-30 Base, AWDFACTORY OEM SERVICE PROCEDURE

A/C Does Not Work Sufficiently: Notes

A/C DOES NOT WORK SUFFICIENTLY (SKYACTIV-G) DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item A/C does not work sufficiently
Description
  • A/C compressor magnetic clutch does not engage when A/C switch is turned on.
  • Compressor valve inoperative
Possible cause
  • PCM, body control module (BCM) or dash-electrical supply unit DTC is stored
  • Refrigerant pressure sensor No. 1 malfunction
  • Refrigerant pressure sensor No. 2 malfunction
  • Improper refrigerant charging amount
  • Seized A/C compressor
  • Evaporator temperature sensor malfunction
  • Short or open circuit in any of the following evaporator temperature sensor circuits.
    • Signal circuit
      • Ground circuit
  • Body control module (BCM) malfunction (Does not receive A/C request signal from climate control unit or transmit it to PCM)
  • Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit A/C request signal)
  • Open circuit in wiring harness between magnetic clutch and body ground
  • A/C relay stuck open
  • Compressor valve malfunction (built-into A/C compressor)
  • Open circuit in A/C relay primary side power supply circuit
  • Open circuit in A/C relay secondary side power supply circuit
  • Open circuit in A/C relay control circuit
  • Open circuit in magnetic clutch power supply circuit
  • Open circuit in compressor valve power supply circuit
  • Open circuit in compressor valve control circuit
G13556284Courtesy of MAZDA MOTORS CORP.
G13556285Courtesy of MAZDA MOTORS CORP.
CAUTION:
  • Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.
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