Data Link Communications System Check. Buick Park Avenue 1999

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Data Link Communications System Check

Step	Action	Normal Result(s)	Abnormal Result(s)*
1	Connect a scan tool to the data link connector (DLC). Set the ignition switch to RUN. Attempt to establish communication with the class 2 serial data line.	The scan tool communicates with the Class 2 serial data line.	Scan Tool Does Not Communicate with Class 2 Data Line
2	Attempt to establish communication with the E and C serial data line.	The scan tool communicates with the E and C serial data line.	Scan Tool Does Not Communicate with E and C Data Line
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.