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ECM Data Line

  1. If all modules cannot be accessed with a scan tool, check the Orange 461 circuit wire for an open between the ALDL connector terminal "M" and S200. See Figure . See WIRING DIAGRAMS  .
  2. If a single module cannot be accessed with a scan tool, check the Orange 461 circuit wire for an open between the module and S200. Repair wiring as necessary.
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