Multiplex Control Unit Input

Remove driver's multiplex control unit from driver's under-dash fuse/relay box, and disconnect connector. See Fig 1 . Inspect connector and terminals for damage, and to ensure they are making good contact. Repair or replace as necessary, then recheck system. With connector still disconnected, perform input tests at connector and driver's under-dash fuse/relay box sockets. See Fig 2 . Repair or replace any parts as necessary.

Fig 1: Identifying Driver's Multiplex Control Unit

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Multiplex Control Unit Input Test

Courtesy of AMERICAN HONDA MOTOR CO., INC.