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부품비
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소요 시간
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2026. 7. 1. 작업
난이도 & 준비물
증상
포드 몬데오 mk4 작업 중입니다. 여러 통신 결함을 발견했습니다. 저항, 전압을 확인했고 오실로스코프에서 CAN High와 CAN Low 신호는 양호하지만 가끔 네트워크 스파이크가 발생합니다. 글로우플러그 릴레이가 몇 초간 간헐적으로 클릭음을 냅니다. 이는 무작위로 발생하지만 도어를 열고 닫을 때도 발생합니다. 점화를 켜면 릴레이가 클릭음을 내고 에어 인테이크 액추에이터가 켜졌다 꺼졌다를 반복합니다. 이것들은 증상일 뿐이라고 생각하며 여러 시도를 했지만 어디를 더 확인해야 할지 모릅니다. 이런 결함을 유발할 수 있는 원인이 무엇일까요?
처리 내용
CAN Hi가 오실로스코프 화면에서 2.5~5V 사이의 깔끔한 사각형 파형이고, CAN Lo가 2.5~0V 사이의 깔끔한 사각형 파형인가요? 그런데 네트워크 통신이 스파이크되거나 불규칙해진다면 배선 문제, 특히 수분 침투 또는 배선이 무언가에 비벼 발생하는 간헐적 단락을 의심해볼 수 있습니다. 이 차량은 미국 판매 모델이 아니므로 대부분의 사용자들이 익숙하지 않습니다. 먼저 차량에 여러 네트워크가 있으므로 어느 네트워크가 영향을 받고 있는지 파악하는 것이 중요합니다. 결함 코드에서 어떤 네트워크인지 표시하고 있습니까?
관련 고장코드
출처
이 사례는 CarTalk (미국)에서 수집한 데이터입니다.
신뢰도 2.5점(참고용) — 출처 소스의 전문성/검증구조를 기준으로 산정된 점수이며, 정확성을 보장하지 않습니다.
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