The Communication Line Check

In the self-diagnostic mode, after the ODO/trip LCD segments check, the self-diagnostic starts the communication line check.

If all segments come on, the communication line is OK.

If the word "Error" is indicated, there is a malfunction in the communication line between the gauge assembly, the multiplex control unit, the keyless control unit, and the ECM/PCM.

Fig 1: Identifying Malfunctioning Code

Courtesy of AMERICAN HONDA MOTOR CO., INC.