Data Link Communications System Check. Cadillac Seville 1999

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Restraints 🢒 SIR 🢒 Data Link Communications System Check

Step	Action	Normal Result(s)	Abnormal Result(s)*
1	Connect scan tool to the data link connector (DLC). Turn ignition switch to RUN.	The scan tool turns on.	Scan Tool Does Not Communicate with Class 2 Data Line
2	Attempt to establish communication with the class 2 serial data line.	Scan tool communicates with the class 2 serial data line.	Scan Tool Does Not Communicate with Class 2 Data Line