Diagnostic System Check - Data Link Communications. Cadillac Eldorado 1999

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Diagnostic System Check - Data Link Communications

Step	Action	Value(s)	Yes	No
1	Connect a scan tool to the vehicle. Turn the ignition switch to RUN. Attempt to establish communications with the vehicle. Does the scan tool communicate with the vehicle?	--	Go to Step 2	Go to Data Link Communications System Check
2	Inspect for any communication DTCs (DTCs that start with the letter U). Are any communication DTCs set?	--	Go to Diagnostic Trouble Code (DTC) List	System OK

Step

Action

Value(s)

Yes

Does the scan tool communicate with the vehicle?

Inspect for any communication DTCs (DTCs that start with the letter U).

Are any communication DTCs set?

System OK