Symptoms - Data Communications: Notes
IMPORTANT:
The following steps must be completed before using the symptom tables.
- Perform the Diagnostic System Check - Vehicle
before using the symptom tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control modules can communicate via the serial data links.
- Review the system operation in order to familiarize yourself with the system functions. Refer to Data Link Communications Description and Operation .