Chart A-2 (MFI CALIF. & New YORK) - Won't Flash Any Codes, Or (Mil) On Steady

Malfunction Indicator Light (MIL) will flash trouble codes when diagnostic request terminal in duty check data link connector is grounded.

NOTE: Test numbers refer to test numbers on diagnostic chart.

Checks for a short to ground in Purple/Yellow wire.
Checks for a faulty ECM or open in Blue/Yellow and Black wires to duty check data link connector.

Fig 1: CHART A-2 - Schematic (MFI Calif. & New York) Won't Flash Any Codes, Or (MIL) On Steady

Fig 2: CHART A-2 - Flow Chart (MFI Calif. & New York) Won't Flash Any Codes, Or (MIL) On Steady