1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 354Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 354

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DIAGNOSTICS
J1-9 J2-32 J2-1

CIRCUIT DESCRIPTION:
When the CodeMate Tester is installed, it plugs into the DLC terminals "F" and "E It receives voltage through CKT 440 terminal