Automotive Diagnostics — Tester Present
Consider tester present service as a way to indicate to the server/ECU that the client/tester is still connected and working. It can be viewed as a heartbeat for servers to recognize if there would be any diagnostic activity
Different sub-functions supported by the tester present are
Important points about tester present
- If the server/ECU is present in a non-default session, the client uses the tester present service to maintain the server in a non-default session.
- To maintain the ECU…