The Communication Line Check
While in the self-diagnostic mode, the Communication Line Check starts after the LCD Segments Check.
If all segments come on, the communication line is OK. If faulty, the word "Error" will be indicated on the odometer display followed by number(s).
Error Code List
ERROR CODE LIST
| Error code | Type of communication line(s) error |
|---|---|
| Error 1 | F-CAN communication |
| Error 2 | UART communication |
| Error 3 | F-CAN and UART communication |
Example Indication
- If the word "Error 1" is indicated, there is a malfunction in the communication line between the gauge control module and the fast-controller area network (F-CAN). Check for DTCs in the ECM/PCM and troubleshoot any DTCs found. If no DTCs are found, go to indicated troubleshooting.
- If the word "Error 2" is indicated, there is a malfunction in the UART communication line between the gauge control module and the multiplex control unit. Go to the gauge control module input test and check the No. 27 terminal. If the wire harness is OK, substitute a known-good gauge control module and recheck.
- If the word "Error 3" is indicated, there is a malfunction in the communication line between the gauge control module and F-CAN and UART. Check for DTCs in the ECM/PCM and troubleshoot any DTCs found.