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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 26 (On-Board Diagnostic - Engine Control System (VIN L & VIN M) (2 Of 4)) >> DTC P0685:00 [Pcm (SKYACTIV-G)] >> Outline

DTC P0685:00 [Pcm (SKYACTIV-G)]: Outline

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DTC P0685:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Main relay control circuit open
Detection condition
  • The period of time in which the PCM power supply remains on after the ignition is switched off is not within the specified time.
Fail-safe
  • Not applicable
Possible cause
  • Main relay malfunction
  • Short to ground or open circuit in main relay power supply circuit
  • Short to ground in PCM power supply circuit
  • PCM connector or terminals malfunction
  • Open circuit in PCM ground circuit
  • Open circuit in PCM power supply circuit
  • PCM malfunction
G13729559Courtesy of MAZDA MOTORS CORP.