The Communication Line Check In the self-diagnosis mode, after the odo/trip LCD Segments Check, the self-diagnosis starts the Communication Line Check. If all segments comes on, the communication line is OK.

- If the word ‘‘Error 1'' is indicated, there is a malfunction in the communication line between the gauge control module and the frame-controller area network (F-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.
- If the word ‘‘Error 2'' is indicated, there is a malfunction in the communication line between the gauge control module and the body-controller area network (B-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.
- If the word ‘‘Error 3'' is indicated, there is a malfunction in the communication line between the gauge control module and the body-controller area network (B-CAN) and the frame-controller area network (F-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.

If any communication line errors are found, go to MICS test mode A.