Tech Tips
Date: September 5, 2014

TT 97-14-02
2004-2017 All Models – Damage to Data Link Connector (DLC)
from Aftermarket Devices (Cannot Communicate with Vehicle
OBD System)
January 27, 2017: Update to Model Year Applicabilty and
Information.

This information also encompasses the information that was in TT 00-15-01, which has been retired. The
data link connector (DLC) is intended for use with diagnostic scan tools and emissions testing stations.
However, aftermarket devices that connect to the DLC have now become available (such as drive-data
recorders, battery maintainers, etc.)
If any such accessory device installed in the DLC is bumped by a driver’s leg or is mis-aligned and then
forced onto the DLC, this can unseat (push-back) or cause damage to one or more terminal pins.
Potential Concerns:
 Customer states they were turned-away from a state required emissions check because the test
station equipment could not communicate with the vehicle OBD system.
 Customer states that another repair shop was unable to communicate with the vehicle OBD system
using a generic scan tool.
Note: An inspection of the DLC is recommended even if a VAS scan tool functions normally, as
generic scan tools and emissions test stations may have shorter pins.
 The ODIS scan tool does not communicate with the vehicle when connected to the DLC.
Diagnosis Tip:
 Visually check for any damage at the DLC. Check each terminal for a pushed-back condition or
looseness in the connector body. A pin-drag check may also be necessary.
Repair:
 Ensure any pushed-back pins are fully seated and retained properly in the connector body. Any
damaged pins (loose, bent, or deformed) should be replaced.
 Following a repair to the DLC, verify communication with the vehicle using a scan tool.

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