DTC P0685-00: Main Relay Control Circuit Open: Outline
DTC P0685:00 (PCM, VINs 7, L, M) 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.
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| Fail-safe |
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| 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
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 Courtesy of MAZDA MOTORS CORP.
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