1

1. Connect the scan tool to the data link connector (DLC).
2. Turn the ignition switch to the RUN position.
3. Attempt to establish communication with the UART serial data line.

2

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

3

Attempt to establish communication with the E and C serial data line.

The scan tool communicates with the E and C serial data line.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.