Data Link Connector (DLC)

1998 Oldsmobile Eighty-Eight V6-3.8L VIN KSECTION Data Link Connector (DLC)
The Data Link Connector (DLC) is a 16-pin connector that provides the technician a means of accessing serial data for aid in the diagnosis. This connector allows the technician to use a scan tool in order to monitor the various serial data (parameters) and display the Diagnostic Trouble Code (DTC) information. The DLC is located inside of the driver's compartment, underneath the dash. Pin-4 and Pin-5 are grounds. Pin-7 is the ISO Serial Data and Pin-16 is B+.

Some common uses of the scan tool are listed below:

^ Identifying the stored Diagnostic Trouble Codes

^ Clearing the DTCs

^ Performing the output control tests

^ Reading the serial data
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.