I take it, you have already checked the main pins of the DLC.

Voltage at the vehicle battery = "X"

Voltage from DLC Pin 16 to Pin 4 = "Same as above"

Voltage from DLC Pin 16 to Pin 5 = "Same as above"

Voltage from DLC Pin 6 to Pin 4 = "Y"

Voltage fro... Login to read more.