DTC P0647-00: A/C Compressor Magnetic Clutch Circuit High Input: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0647:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE


System malfunction location	A/C compressor magnetic clutch circuit high input
Detection condition	The A/C compressor magnetic clutch control voltage at the PCM terminal 2AF is high for a continuous 5 s relative to the PCM control signal.
Fail-safe	Release the magnetic clutch.
Possible cause	A/C relay malfunction PCM connector or terminals malfunction Short to power supply in A/C relay control circuit PCM malfunction
Courtesy of MAZDA MOTORS CORP.