DTC U0284-00: Lin Communication System: Communication Error Between Active Air Shutter And Pcm: 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 U0284:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
LIN communication system: Communication error between active air shutter and PCM |
| Detection condition |
- PCM detects a communication error between the PCM and active air shutter.
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| Fail-safe |
|
| Possible cause |
- LIN communication line malfunction between active air shutter and PCM
- Active air shutter connector or terminals malfunction
- F10 15 A fuse malfunction
- Short to ground in active air shutter power supply circuit
- Open circuit in active air shutter power supply circuit
- Open circuit in active air shutter ground circuit
- PCM connector or terminals malfunction
- Short to ground in active air shutter LIN communication line
- Short to power supply in active air shutter LIN communication line
- Open circuit in active air shutter LIN communication line
- Active air shutter malfunction
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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