On-Board Diagnostics

Diagnostics for this system require use of the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent. The module controlling the system being diagnosed communicates with the Data Link Connector (DLC) located beneath the instrument panel.

Connect the OBD II style communication cable to the NGS. Attach the NGS and communication cable to the DLC beneath the instrument panel. Select the proper vehicle model and year from the NGS menu. You may then access the testing area of the NGS menu required to diagnose this vehicle system.

The anti-lock brake control module monitors system operation and can store all defined Diagnostic Trouble Codes (DTCs) in its memory. It is important to understand that the anti-lock brake control module cannot recognize some failures, therefore if a concern exists and no DTCs are stored by the anti-lock brake control module, other diagnostic steps must be followed.

The anti-lock brake control module cannot store a DTC if there is no power to the anti-lock brake control module. This condition can be found by using the Quick Check Sheet. Quick Check Sheet

If you get the response "Link Communication Error, Module Not Responding" when trying to retrieve DTCs, it means the NGS is not able to communicate with the anti-lock brake control module. It does not mean the anti-lock brake control module is defective. Check the following items when this message occurs:

1. Confirm that the ignition switch is in RUN position.
2. Check the fuse panel and power distribution box for blown fuses.
3. Check the NGS connection to the diagnostic connector.
4. There is an 8-pin connector on the LH front fender apron (by the power distribution box). This connector is used by the assembly plant. Ensure that there is a cap on this connector. If the cap is not in place, power cannot get to the anti-lock brake control module.

If none of these actions will restore the communication link, proceed to Anti-Lock Quick Check Sheet to check battery power, ignition feed, and diagnostic link. Quick Check Sheet